TY - JOUR A1 - Hartmann, Jürgen T1 - Development and test of a long wavelength infrared radiation thermometer for non-contact temperature measurements in gas turbines during operation JF - Technisches Messen N2 - The aim of this work was the development of a long wavelength infrared radiation thermometer for the non-contact measurement of surface temperatures in stationary gas turbines during operation within the EU-project, Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines (acronym STARGATE)". In this work, the infrared-optical properties of the thermal barrier coatings and the combustion gases were determined at ZAE Bayern at high temperatures up to 1600 K and pressures up to 13 bar. Based on these experimental characterizations, a suitable spectral range could be identified which lies around 10 mu m for the long-wavelength infrared radiation thermometer. According to these findings, a laboratory setup with suitable optical components (filters, IR-fibers, etc.) was firstly realized and verified. Subsequently, a prototype for measurements in gas turbines during operation of the turbines has … Y1 - 2018 VL - 85 IS - 1 SP - 28 EP - 39 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Harrer, S. A1 - Dotterweich, C. A1 - Zink, Markus H. A1 - Hemberger, Frank A1 - Ebert, Hans-Peter A1 - Schnitzler, Tim T1 - Phase change materials for use in thermally and electrically stressed insulation for high voltage applications T2 - 2016 IEEE Electrical Insulation Conference N2 - The temperature of high voltage equipment is often the limiting factor when transmitting electrical energy because the electrical insulation can get severely aged when the temperature is exceeding a certain limit. Hence, cooling has to be improved or heat generation must be reduced to avoid damage of the insulation. In this paper a new method was examined by investigating electrically insulating phase change materials which are able to store latent heat during a phase change from the solid to liquid state in times of high energy demand. To verify the electrically insulating properties of paraffins, one class of phase change materials, a special test cell was designed allowing the determination of breakdown voltage of phase change materials. The measurements on one paraffin sample proved the promising electrical insulating properties and it was shown that the breakdown voltage in the liquid state is comparable … Y1 - 2016 UR - https://ieeexplore.ieee.org/iel7/7541933/7548553/07548675.pdf SN - 978-1-4673-8706-4 SP - 605 EP - 608 PB - IEEE ER - TY - CHAP A1 - Hartmann, Jürgen T1 - I3. 4-Radiometric calibration of the NIRSpec instrument on the James Webb Space Telescope in the wavelength range from 0.7 μm to 5.0 μm T2 - SENSOR+TEST Conference 2009 - IRS² 2009 Proceedings Y1 - 2009 UR - http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.1019.284&rep=rep1&type=pdf SP - 249 EP - 254 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Strahlungsthermometrie BT - Temperaturen berührungslos messen JF - PTB-Mitteilungen 117 N2 - Der prinzipielle Aufbau eines Strahlungsthermometers ist in Bild 2 dargestellt. Eine Optik bildet das Messobjekt mittels der Wärmestrahlung auf die Gesichtsfeldblende vor dem Detektor ab. Die Aperturblende und die Gesichtsfeldblende definieren den Raumwinkel und die Fläche (Messfeld) der vom Detektor nachgewiesenen Strahlung. Bei den meisten Strahlungsthermometern wird ein Spektralfilter zur Eingrenzung des Wellenlängenbereiches der auf den Detektor treffenden Strahlung verwendet. Dieser Spektralfilter wird oft unmittelbar vor dem Detektor angeordnet oder ist als Fenster in das Detektorgehäuse integriert. Bei hochwertigen Strahlungsthermometern wird der Detektor und manchmal auch zusätzlich der Spektralfilter temperiert. Interne Referenzstrahlungsquellen oder nur die Messung und Verarbeitung der internen Temperatur des Detektors oder der optischen Komponenten sorgen im allgemeinen für eine stabile Anzeige von Messwerten der Strahlungstemperatur innerhalb eines weiten Eigentemperaturbereichs des Strahlungsthermometers. Die Leistungsfähigkeit eines Strahlungsthermometers wird wesentlich von der Güte seiner Optik und der Empfindlichkeit seines Strahlungsempfängers bestimmt. Hochwertige Strahlungsthermometer arbeiten mit einem festen Fokus, der dem empfohlenen Messabstand entspricht, oder mit variablem Fokus zur Anpassung an den Messabstand. Aus der abstandsabhängigen Einstellung des Fokus resultiert ein Messfeld, in dem die mittlere Strahlungstemperatur des Messobjektes ermittelt wird. Genaue Messungen der Strahlungstemperatur sollten mit abbildenden optischen Systemen erfolgen … Y1 - 2007 UR - http://www.relativity.li/uploads/pdf/weitere/PTB_2007_Heft_3.pdf#page=53 VL - 117 IS - 3 SP - 272 EP - 281 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard A1 - Monte, C. A1 - Gutschwager, B. A1 - Hollandt, Jörg T1 - Traceable calibration of radiation sources from the visible to the far infrared for space borne applications at PTB T2 - Proceedings of SPIE Volume 7474, Sensors, Systems, and Next-Generation Satellites XIII N2 - The Physikalisch-Technische Bundesanstalt (PTB) has developed dedicated instrumentations and methods for the traceable calibration of space borne instruments in terms of the three fundamental radiometric units, i.e. spectral radiance (radiation temperature), spectral radiant intensity and spectral photon flux. The traceable calibration under conditions similar to the space environment is achieved by use of two major radiometric calibration facilities of PTB, the Spectral Radiance Comparator Facility (SRCF) and the Reduced Background Calibration Facility (RBCF) which are part of the Primary Temperature Radiator Facility of PTB and cover the wavelength range from the UV to the FIR (THz range). The improved detector instrumentations of the SRCF and RBCF, detailed calibration schemes and results of calibrations for space missions are presented. Y1 - 2009 UR - https://doi.org/10.1117/12.830082 ER - TY - CHAP A1 - Hartmann, Jürgen ED - Zvizdic, D. T1 - Long term stability of the spectral responsivity of filter radiometers at the PTB T2 - Proc. of TEMPMEKO N2 - The Physikalisch-Technische Bundesanstalt (PTB) uses calibrated filter radiometers to measure the thermodynamic temperature of blackbodies applied for the realisation and dissemination of the spectral radiance and spectral irradiance. This paper presents the PTB experience with the stability of the spectral responsivities of two different sets of filter radiometers, a set of four broad-band filter radiometers with centroid wavelengths in the visible spectral range (437 nm, 510 nm, 558 nm and 728 nm), using a combination of coloured glass filters as wavelength selective elements and a set of five narrow-band interference filter radiometers with centroid wavelengths in the visible and in the near infrared wavelength range (676 nm, 802 nm, 903 nm and 1003 nm). The time period of their continuous investigation with respect to the relevant stability parameters, the integrated spectral responsivity and the centroid wavelength, is about seven years for the broad-band filter radiometers and up to ten years for the narrow-band interference filter radiometers. Both types of filter radiometers show sufficient stability for their application as high-accuracy temperature measurement instruments. Relative changes in the integrated spectral responsivity up to some parts in 103 and for the interference filter radiometers a linear increase of the centroid wavelength with time in the order of several ten picometers per year have been observed. A comparison between the two types of filter radiometers is given, with respect to the contribution of the stability of these parameters to the uncertainty budget of thermodynamic temperature determination. Reasons for the observed … Y1 - 2004 UR - https://www.researchgate.net/profile/Juergen_Hartmann3/publication/259810265_Long_Term_Stability_of_the_Spectral_Responsivity_of_Filter_Radiometers_at_the_PTB/links/5f4cc8dba6fdcc14c5f4740e/Long-Term-Stability-of-the-Spectral-Responsivity-of-Filter-Radiometers-at-the-PTB.pdf SP - 977 EP - 982 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - McEvoy, H.C. A1 - Machin, Graham A1 - Friedrich, R. A1 - Hollandt, Jörg T1 - Comparison of the New NPL Primary Standard Ag Fixed‐Point Blackbody Source with the Primary Standard Fixed Point of PTB T2 - AIP Conference Proceedings (684) N2 - Above the freezing point of silver (961.78 °C), the International Temperature Scale of 1990 is defined in terms of Planck’s radiation law. The scale is maintained and disseminated using a validated and linear pyrometer in conjunction with a blackbody reference source at either the Ag, Au (1064.18 °C) or Cu (1084.62 °C) freezing point. In order to realize the scale with the highest precision high quality, well‐characterised, reproducible fixed‐point blackbody sources are required. Such sources have been maintained at NPL for a number of years, but it was felt that improvements to the design would be beneficial. A new Ag point blackbody source has therefore been constructed. The new design will improve the quality and reproducibility of the melting and freezing plateaux and reduce errors due to the ‘out‐of‐focus’ size‐of‐source effect which is difficult to measure and to eliminate. Full details of the design of the new … Y1 - 2003 UR - https://aip.scitation.org/doi/abs/10.1063/1.1627244 SN - 0-7354-0153-5 SP - 909 EP - 914 PB - American Institute of Physics ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard T1 - Assessing blackbody emissivity by monte carlo simulation T2 - Proc. of the Int. Conference of Infrared Sensors and Systems Y1 - 2002 SP - 133 EP - 138 PB - AMA Service GmbH ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Fischer, Joachim ED - Carleer, M. ED - Hilton, M. ED - Lamp, T. ED - Reuter, R. ED - Russwurm, G.M. ED - Schaefer, K. ED - Weber, K. ED - Weitkamp, K. ED - Wolf, J. ED - Woppowa, L. T1 - Radiator standards for accurate IR calibrations in remote sensing based on heatpipe blackbodies T2 - Proceedings Volume 3821, Environmental Sensing and Applications N2 - The demand of instrumentation in the field of remote sensing is increasing rapidly. For international compatibility, for reliable results and precise long-term investigation, necessary for example in the measurement of climatic trends, accurate traceability of the results to international standards or SI-units is mandatory. Additionally, interpretation of the results strongly requires a careful evaluation of the involved errors and the resulting uncertainties in order to allow for a rating of the obtained results. For that purpose quality assurance was introduced, not only for industrial fabrication, but also, and with increasing tendency, for industrial and scientific research. As an overview, the necessity and the possibilities of quality assurance in the area of remote sensing are discussed. Taking remote sensing of temperature as an example, the general approach is described. For that purpose, a description of heatpipe blackbodies … Y1 - 1999 UR - https://www.spiedigitallibrary.org/conference-proceedings-of-spie/3821/0000/Radiator-standards-for-accurate-IR-calibrations-in-remote-sensing-based/10.1117/12.364203.short IS - 3821 SP - 395 EP - 403 PB - International Society for Optics and Photonics - Proceedings of SPIE ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Fischer, Joachim ED - Dubbeldam, J.F. ED - de Groot, M.J. T1 - Calibration of tungsten strip lamps as transfer standards for temperature T2 - Proceedings of TEMPMEKO (99) N2 - An advanced method for the calibration of tungsten strip lamps is reviewed in detail. The method is based on measuring the ratio of the spectral radiances of two sources at different radiance temperatures TL by radiation thermometry. Instead of using the distribution temperature and the colour emissivity for the calculation of the radiance temperature, the derivative dTL/dλ in the vicinity of the effective wavelength of the detection system is applied. In a first step high-stability vacuum tungsten strip lamps are calibrated as first-order working standards with respect to fixed points of the International Temperature Scale of 1990 (ITS-90). In a subsequent step, secondary working standards are calibrated relative to these first order working standards with light of different wavelengths determined by interference filters. A detailed description of the evaluation procedure for the determination of the radiance temperature of the lamps is given and several problems encountered in operating the lamps are discussed. The standard uncertainties of the radiance temperature are below 0.2 K for the first order working standards. Y1 - 1999 UR - https://www.researchgate.net/profile/Juergen_Hartmann3/publication/237441225_CALIBRATION_OF_TUNGSTEN_STRIP_LAMPS_AS_TRANSFER_STANDARDS_FOR_TEMPERATURE/links/02e7e52f7dbbe2abcb000000/CALIBRATION-OF-TUNGSTEN-STRIP-LAMPS-AS-TRANSFER-STANDARDS-FOR-TEMPERATURE.pdf SP - 561 EP - 566 PB - IMEKO CY - Delft ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Hollandt, Jörg A1 - Schreiber, Ekkehard A1 - Yamada, Y. T1 - Improved thermal stability of the linear pyrometer LP3 for high temperature measurements within the EU-project Himert JF - VDI Bericht 1784 Y1 - 2003 SP - 135 EP - 141 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Realisation and dissemination of thermodynamic temperature above 1234.93 K JF - CCT Working Documents Y1 - 2010 UR - https://www.bipm.org/cc/CCT/Allowed/25/D12r_MeP-HT_v8.pdf ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Intercomparison of radiation temperature scales between PTB and NMIJ from 1000/spl deg/C to 2500/spl deg/C T2 - Proceedings of the 41st SICE Annual Conference N2 - The intercomparison of radiation temperature scales between PTB and NMIJ was carried out in September 2001. PTB sent their radiation thermometer LP3 to Japan and NMIJ made the comparison between the LP3 and NMIJs Topcon radiation thermometers with a comparison blackbody from 1000/spl deg/C to 2500/spl deg/C. Both scales agreed within /spl plusmn/0.8/spl deg/C in the whole range. Y1 - 2002 UR - https://ieeexplore.ieee.org/iel5/8505/26882/01195182.pdf SP - 58 EP - 62 PB - IEEE ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Zipf, Matthias A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - Infrared-optical characterization of emitting and absorbing gases at high temperatures and high pressures JF - High Temperatures – High Pressures N2 - In the context of the optimization of stationary gas turbines, the surface temperatures of the turbine blades have to be measured by a non-contact technique using radiation thermometers during operation of the turbine. Nowadays turbine blades are protected by thermal barrier coatings. The infrared-optical properties of these coatings require the usage of the MIR or LWIR region for non-contact measurement of the surface temperatures. For performing such measurements and for properly analyzing the derived data, the transmission and absorption spectra of the combustion gas mixture within the turbine were determined at the local conditions during operation of the turbine. Therefore, subject of this work is the measurement of the transmission spectra of carbon dioxide and water vapor at high temperatures and high pressures to identify a wavelength range, which is almost free of absorption and emission effects. In … Y1 - 2018 VL - 47 IS - 1 SP - 3 EP - 21 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Machin, Graham A1 - Yamada, Y. A1 - Lowe, D. A1 - Sasajima, N. A1 - Anhalt, Klaus A1 - Goebel, R. A1 - McEvoy, H.C. A1 - Bloembergen, P. ED - Zvizdic, D. T1 - A comparison of high temperature fixed-points of Pt-C and Re-C constructed by BIPM, NMIJ and NPL BT - Proc. 9th Int. Symp. on Temperature and Thermal Measurements in Industry and Science T2 - Proceedings of Tempmeko 2004 Y1 - 2005 SP - 1049 EP - 1056 PB - LPM/FSB CY - Zagrep ER - TY - JOUR A1 - Hartmann, Jürgen T1 - A study on the feasibility of measuring the emissivity with the laser-flash method JF - International Journal of Thermophysics N2 - The laser-flash method is a fast, widely used and well established technique to measure the thermal diffusivity. Since its introduction in the 1960s, it was proposed to expand this technique to the measurement of heat capacity and emissivity. Currently, the measurement of spectral emissivity at high temperatures is connected with relatively large uncertainties, although the spectral emissivity is an essential parameter for applications, e.g., in the lamp industry and fusion research. In this work, a theoretical study is presented on the possibility of emissivity measurements using the laser-flash method. Two mathematical approaches are discussed which solve the problem, that a measured temperature rise—necessary to calculate the emissivity—itself depends on the emissivity. It is shown that both methods have a negligible arithmetic error, making them applicable to be used in future work. Y1 - 2010 UR - https://link.springer.com/content/pdf/10.1007/s10765-010-0767-z.pdf VL - 31 IS - 4-5 SP - 998 EP - 1010 ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Thermodynamic temperature measurements of the melting curves of RE-C, TIC-C And ZRC-C eutectic irradiance mode fixed-point cells T2 - Proceedings TEMPMEKO 2004 N2 - The thermodynamic temperatures of the phase transition of Re-C, TiC-C, and ZrC-C eutectic fixed-point cells have been measured for the first time using different filter radiometers in irradiance mode. The spectral responsivity of these filter radiometers was measured traceable to the primary detector standard of the PTB, a laser based cryogenic radiometer. The relative extended uncertainties of the spectral responsivities of the filter radiometers in the irradiance mode were in the range from 5· 10-4 up to 2.5· 10-3. The measurements have been performed at the high temperature calibration facilities of the VNIIOFI and the PTB with eutectic fixed-point cells manufactured by VNIIOFI. Y1 - 2004 UR - http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.454.3165&rep=rep1&type=pdf SP - 189 EP - 194 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - A comparison of the blackbody cavities for infrared ear thermometers of NMIJ, NPL, and PTB JF - AIST Bulletin of Metrology N2 - A comparison of the NMIJ, the NPL, and the PTB blackbody cavities for infrared ear thermometers has been performed for the first time. The NMIJ and the PTB have transported their standard blackbodies to the NPL and radiance temperatures of the blackbodies of the institutes have been directly compared simultaneously using high-resolution infrared ear thermometers as comparators. The results of the comparison show that radiance temperatures realized by the NMIJ, the NPL, and the PTB cavities agree within +/-0.01 deg C, well within their uncertainty levels of around 0.04 deg C in the temperature range from 35 deg C to 42 deg C. Y1 - 2007 VL - 5 IS - 4 SP - 251 EP - 256 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Friedrich, R. A1 - Schiller, S. A1 - Fischer, J. ED - Fellmuth, B. ED - Seidel, J. ED - Scholze, G. T1 - Non-isothermal temperature distribution and resulting emissivity corrections for the high temperature blackbody BB3200 T2 - Proc. 8th International Symposium on Temperature and Thermal Measurements in Industry and Science - Proceedings of Tempmeko 2001 Y1 - 2002 SP - 227 EP - 232 PB - VDI Verlag CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen T1 - A comparison of Co-C, Pd-C, Pt-C, Ru-C and Re-C eutectic fixed points independently manufactured by three different institutes T2 - Proc. Newrad (Davos, Switzerland) N2 - In order to assess the performance and capability as well as the reproducibility of cell production five different Metal-carbon (MC) eutectic cells from three institutes were measured by radiation thermometry at PTB. The reproducibility of the melting temperature approached the requirements set by CCT/CCPR but significant differences were seen between different manufactures. Y1 - 2005 UR - https://www.academia.edu/download/41206514/A_comparison_of_CoC_PdC_PtC_RuC_and_ReC_20160114-3055-1lybi4p.pdf20160115-19908-1rtghdd.pdf SP - 289 EP - 290 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Sadli, M. A1 - Machin, G. A1 - Morice, R. ED - Fellmuth, B. ED - Seidel, J. ED - Scholze, G. T1 - Realisation and comparison of metal-carbon eutectic points for radiation thermometry applications and W-Re thermocouple calibration T2 - Proc. 8th Int. Symp. on Temperature and Thermal Measurements in Industry and Science - Proceedings of Tempmeko 2001 N2 - For the sake of ensuring improved accuracy and traceability for temperature measurements above the copper point (1084 OC), four laboratories are joining their efforts in developing high-temperature fixed points based on eutectic transitions of metal-carbon mixtures [1]. These phase transitions, on the basis of radiation thermometry results presented thus far [2, 3], encouraged the participants to work towards two eventual applications: hightemperature fixed—point calibration sources for radiation thermometry, and fixed points for the calibration of contact thermometers, including Pt/Pd, Pt/Rh and W/Re thermocouples. Here will be given the up-to—date works accomplished within or in relation with this project in the participating laboratories. The perspectives of this work are wide and should allow the usage of such fixed points at temperatures ranging from 1150 C to 2700 C. The remaining uncertainty concerns the … Y1 - 2002 UR - https://www.researchgate.net/profile/Graham_Machin/publication/259712992_Realisation_and_comparison_of_metal-carbon_eutectic_points_for_radiation_thermometry_applications_and_W-Re_thermocouple_calibration/links/02e7e52d6c8d4c143c000000.pdf SP - 507 EP - 512 PB - VDI Verlag CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Measurement of T-T90 down to zinc point temperatures with absolute filter radiometry T2 - Proc. of TEMPMEKO Y1 - 2001 SP - 377 EP - 382 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard A1 - Fischer, Joachim ED - Dubbeldam, J.F. ED - de Groot, M.J. T1 - Characterization of the double-heatpipe blackbody LABB for use at temperatures below 500 C T2 - Proceedings of TEMPMEKO (99) N2 - The large area double-heatpipe blackbody (LABB) used for comparing thermodynamic temperatures with the International Temperature Scale of 1990 (ITS-90) at temperatures higher than 600 C is based on two sodium heat pipes. The lowest temperature at which the sodium heat pipes work properly is strongly correlated to the onset of sodium evaporation. This is expected for temperatures well above 500 C. Planning to use the LABB for extending the comparison of thermodynamic temperatures with the ITS-90 to temperatures as low as possible, we measured the isothermal behaviour of the blackbody cavity starting at heatpipe temperatures of 400 C. The temperature of the cylindrical part of the cavity was measured with a standard platinum resistance thermometer (SPRT) sensing the bottom of the cavity and up to three quarter of the cylindrical part of the cavity. The obtained temperature profiles are well explained assuming the occurrence of two superimposing effects: a real nonisothermal behaviour of the LABB for temperatures below 500 C and a cooling of the SPRT caused by radiation loss through the aperture of the cavity. Applying a Monte-Carlo simulation we calculated the emissivity of the LABB at different heatpipe temperatures below 600 C using the obtained non-isothermal temperature distribution at the cylindrical walls. It was found that even at temperatures as low as 415 C the accuracy of the LABB is sufficient for comparison of thermodynamic temperatures and the ITS-90. Y1 - 1999 UR - https://www.researchgate.net/profile/Juergen_Hartmann3/publication/279059568_Characterization_of_a_double-heatpipe_blackbody_LABB_for_use_at_temperatures_below_500_c/links/5589455b08ae9076016e9a81/Characterization-of-a-double-heatpipe-blackbody-LABB-for-use-at-temperatures-below-500-c.pdf SP - 511 EP - 516 PB - IMEKO CY - Delft ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Traceable Radiometric Calibration of Semiconductor Detectors and their Application for Thermodynamic Temperature Measurement JF - Journal of Metrology Society of India N2 - The non-contact measurement of temperature by using the emitted thermal radiation has been an innovative field of measurement science and fundamental physics for more than a hundred years. It saw the first highlight in Gustav Kirchhoff’s principle of a blackbody with ideal emission characteristics and culminated in Max Planck’s formulation of the law of thermal radiation, the so-called Planck’s law, forming the foundation of quantum physics. A boost in accuracy was the development of semiconductor detectors and the cryogenic electrical substitution radiometer in the late 1970s. Semiconductor detectors, namely photodiodes, deliver an electrical current proportional to the absorbed optical radiation. Due to the measurements of thermal radiation over a wide range of temperature and wavelength, thermodynamic temperature measurements with radiometric methods have set benchmarks to all, the … Y1 - 2010 UR - http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.452.930&rep=rep1&type=pdf VL - 25 IS - 1 SP - 3 EP - 10 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Sakuma, F. A1 - Ma, L. T1 - Intercomparison of Radiation Temperature Scales between PTB and NMIJ from 1000-degree Celsius to 2500-degree Celsius T2 - SICE Annual Conference Program and Abstracts SICE Annual Conference 2002 N2 - The intercomparison of radiation temperature scales between PTB and NMIJ was carried out in September 2001. PTB sent their radiation thermometer LP3 to Japan and NMIJ made the comparison between the LP3 and NMIJ’s Topcon radiation thermometers with a comparison blackbody from 1000 C to 2500 C. Both scales agreed within±0.8 C in the whole range. Y1 - 2002 UR - https://doi.org/10.11499/sicep.2002.0.13.0 SP - 13 EP - 13 PB - The Society of Instrument and Control Engineers ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Thermal characterisation of diamond T2 - Properties, Growth and Applications of Diamond N2 - Thermal characterisation of diamond is one of the key issues in assessing material quality since thermal parameters are strongly related to other features like isotopic constitution, defect content and microstructure (see Datareview A 1.5). Hence, the macroscopic thermal conductivity can often be taken as a figure-of-merit for diamond quality relevant for industrial applications. Determining thermal conductivity of diamond materials does not require, in principle, techniques other than those used for thermal assessment of more common materials and the standard methods as well as their application to diamond have been described in detail in rather complete review articles [1, 2]. Recent advancements in methodology have mainly been focused on thermal microscopy for measuring conductivity in extremely small volumes and finally single grains of polycrystalline material [3] and to quantitatively determine resistances across thermal barriers related to grain boundaries in thin films [4]. In this survey we summarise the main features of the standard techniques and briefly review the technology of quantitative thermal microscopy. It is difficult to precisely control and measure heat flow and radiation and, hence, thermal measurements generally yield only a rather limited precision; this fully applies also to measurements on diamond materials. An accuracy of a few per cent has to be regarded as excellent while the precision of most measurements is at a 5 to 10% level or below. As demonstrated by a recent round robin test [5], this especially applies to the characterisation of polycrystalline thin films where measurements may be strongly affected by the … Y1 - 2001 PB - Institute of Engineering & Technology ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Ricolfi, T. A1 - Batuello, M. A1 - Bosma, R. A1 - van der Ham, E. A1 - Fischer, J. ED - Fellmuth, B. ED - Seidel, J. ED - Scholze, G. T1 - Comparison of local realizations of the ITS-90 between 920° C and 1590° C at 950 nm using vacuum tungsten strip lamps as transfer standards T2 - Proc. of TEMPMEKO (2001) Y1 - 2002 SP - 839 EP - 844 PB - VDI Verlag CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Breuer, J. A1 - Johannsen, U. A1 - Rabus, H. A1 - Werner, L. T1 - PTB detector calibration capabilities for optical radiometry T2 - Sensor 2001 Proceedings N2 - In the first part of this paper we give a brief survey of the approaches taken to achieve these rather challenging goals. Then we will focus on some aspects of transfer detector standards that have to be taken into account if the highest possible accuracy is to be reached. The final section of the paper deals with a new and very promising method for the dissemination of the spectral responsivity of semiconductor photodiodes. Y1 - 2001 SP - 227 EP - 232 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Gutschwager, B. A1 - Fischer, J. T1 - Calibration facility for infrared thermography systems at PTB T2 - Sensor 2001 Proceedings N2 - Section 2 of the present paper introduces the two calibration facilities, presents the applied blackbody radiation sources with the achievable uncertainties, the collimator optics, and the climate box. A short introduction of the experimental techniques used and presentation of some experimental results for different camera systems follows in Section 3. A final conclusion is given in Section 4. Y1 - 2001 SP - 233 EP - 238 ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Complete characterization of local thermal transfer in high quality CVD diamond T2 - AIP Conference Proceedings (463) N2 - Room temperature microscopic thermal transfer in a high quality chemical vapor deposited diamond sample is completely characterized with micrometer resolution. A thermoreflectance microscope measures thermal conductivity and its slight variations inside a grain. Measurements reveal an inhomogeneous conductivity distribution with highest values close to that of natural IIa diamond. Using the same microscope, frequency dependent investigations of thermal barriers located between diamond grains are performed. Thermal resistance is found to vary between 10−9 and 10−8 m2K/W. Frequency dependent measurements sensitive to three-dimensional heat flow and averaging over a variable number of grains yield an enormous decrease of thermal conductivity with decreasing modulation frequency. Taking the average of thermal conductivity inside the grains and an average value for the barrier height together … Y1 - 1999 SP - 295 EP - 299 ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Reichling, M. T1 - Photothermische Mikroskopie BT - Berührungslose Temperaturmessung mit höchster räumlicher Auflösung Y1 - 1998 SP - 221 EP - 226 PB - VDI-Bericht 1379 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Condensed matter: structural, mechanical, and thermal properties BT - local variation of room-temperature thermal conductivity in high-quality polycrystalline diamond JF - Applied Physics Letters Y1 - 1998 VL - 73 IS - 6 SP - 756 EP - 758 ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Improvement of the active layers of a MIS-structure semiconductor gas sensor for HF and F Y1 - 1995 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Arduini, Mariacarla T1 - A Novel Approach for Non-Destructive Testing of the Adhesion of Thermal Barrier Coatings N2 - The operation temperatures of gas turbine engines have been increased significantly to optimize their efficiency factor. To protect the metallic blades from these high temperatures, thermal barrier coatings (TBCs) are applied onto the turbine blades. These layers must have a good adhesion to the supporting turbine blade. A poor adhesion may lead to a delamination of the layer during operation and finally to a destruction of the turbine blade and eventually the complete turbine. It is therefore necessary, to check the quality of the layer adhesion regularly during service or preferably during operation. Approaches for non-contact and nondestructive techniques by using optical or infrared radiation are not sophisticated up to now. Hence in this paper a new attempt to improve these optical or infrared-optical methods is described. The presented idea relies on the application of different wavelengths for the used measurement system. Using a short wavelength range, where the TBC is semitransparent, allows the measurement of the temperature of the turbine blade. Using a second, long wavelength range where the TBC is non-transparent, the temperature of the surface of the TBC can be determined. As the thermal contact is usually correlated with the mechanical adhesion such measurements can be a possible tool for nondestructively testing the adhesion of TBCs. Y1 - 2016 UR - https://www.researchgate.net/profile/Juergen_Hartmann3/publication/309291712_A_Novel_Approach_for_Non-Destructive_Testing_of_the_Adhesion_of_Thermal_Barrier_Coatings/links/5ec230b2458515626cb0b295/A-Novel-Approach-for-Non-Destructive-Testing-of-the-Adhesion-of-Thermal-Barrier-Coatings.pdf SP - 12 EP - 13 PB - The Future of Gas Turbine Technology ; 8 th International Gas Turbine Conference CY - Brüssel (Belgien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Werner, L. A1 - Fischer, J. A1 - Johannsen, U. T1 - Accurate determination of the spectral responsivity of silicon trap detectors between 238 nm and 1015 nm using a laser-based cryogenic radiometer BT - Newrad’99 Y1 - 1999 CY - Madrid (Spanien) ER - TY - GEN A1 - Hartmann, Jürgen A1 - Reichling, M. T1 - A new insight into local heat transfer in polycrystalline diamond BT - Diamond ´97 (Poster) Y1 - 1997 CY - Edinburgh (Schottland) ER - TY - GEN A1 - Hartmann, Jürgen A1 - Reichling, M. T1 - Quantitative photothermal measurement of thermal barriers in CVD-Diamond BT - Diamond ´97 (Poster) Y1 - 1997 CY - Edinburgh (Schottland) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Reichling, M. A1 - Matthias, E. T1 - Thermoreflectance measurements of single thermal barriers in CVD-Diamond BT - 9th International conference on Photothermal and Photoacoustic Phenomena Y1 - 1996 CY - Nanjing (China) ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Photothermal microscopy on CVD-diamond BT - Workshop´95 Photoacoustics and Photothermics Y1 - 1995 CY - Ebernburg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Nilsson, O. A1 - Fricke, J. T1 - Thermal diffusivity measurements on two-layered systems with the laser-flash method BT - 13th European Conference on Thermophysical Properties Y1 - 1993 CY - Lissabon (Portugal) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Mehling, H. T1 - The role of the index of refraction in the generation and propagation of blackbody radiation BT - Tempemko 2013 Y1 - 2013 CY - Funchal (Portugal) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Ebert, Hans-Peter A1 - Lenhart-Rydzek, M. A1 - Tutschke, Andreas A1 - Hallam, Andrew T1 - LWIR pyrometry for the measurement of thermal barrier coatings within the EU project STARGATE BT - Tempmeko 2013 Y1 - 2013 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Lenhart-Rydzek, M. A1 - Stark, Thomas A1 - Arduini-Schuster, Mariacarla A1 - Manara, Jochen T1 - Enhanced measuring technique to determine the angle dependent surface emittance from 200 °C up to 1600 °C BT - Tempmeko 2013 Y1 - 2013 CY - Funchal (Portugal) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Edler, F. T1 - High-temperature fixed-points for improved temperature metrology above 1100 °C BT - 9. Workshop on subsecond thermophysics, September 2010 Y1 - 2010 CY - Graz ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Krenek, S. A1 - Anhalt, Klaus A1 - Lindemann, A. A1 - Hollandt, Jörg T1 - Dynamic Emissivity Measurement: First Results BT - 9. Workshop on subsecond thermophysics Y1 - 2010 CY - Graz ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Sarge, S.M. A1 - Pagel, R. A1 - Schindler, A. A1 - Denner, T. T1 - Eutectic high-temperature fixed-points for improves traceability in DSC/DTA BT - 9. Workshop on subsecond thermophysics Y1 - 2010 CY - Graz ER - TY - GEN A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Pagel, R. A1 - Sarge, S. T1 - Temperature calibration of thermoanalytical apparatus above 1000 °C by means of Metal-Carbon Eutectics BT - ESTAC 2010 (Poster, Best Poster Award) Y1 - 2010 CY - Rotterdam (Niederlande) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Krüger, U. A1 - Anhalt, Klaus A1 - Taubert, Dieter Richard A1 - Schmidt, Franz T1 - CCD-camera for measuring temperature and spectral radiance BT - CIE Division 2 symposium Y1 - 2010 CY - Bern ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Taubert, Dieter Richard A1 - Krüger, U. A1 - Schmidt, Franz T1 - CCD-camera for measuring temperature and spectral radiance BT - Tempmeko 2010 Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. T1 - Experimental set-up for dynamic material investigation BT - European Conference on Thermophysical Properties 2017 Y1 - 2017 CY - Graz (Österreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Harrer, S. A1 - Dotterweich, C. A1 - Zink, Markus H. T1 - On the conduction process of dielectric liquids based on mineral oil BT - International Symposium on High Voltage Engineering 2017 Y1 - 2017 CY - Buenos Aires (Argentinien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Zipf, Matthias A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - Non-Contact Temperature Measurement Of Combustion Gases at High Temperatures and High Pressures BT - Tempmeko 2016 Y1 - 2016 CY - Zakopane (Polen) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Hollandt, Jörg A1 - Schreiber, Ekkehard A1 - Yamada, Y. T1 - Improved thermal stability of the linear pyrometer LP3 for high temperature measurements within the EU-Project HIMERT BT - Temperatur 2003 Y1 - 2003 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard T1 - Assessing blackbody emissivity by Monte Carlo Simulation BT - IRS² 2002 Y1 - 2002 CY - Erfurt ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark A1 - Hodge, D. T1 - Development of Long Wavelength Infrared Radiation Thermometry for Measurements in Gas Turbines BT - Material Science and Engineering 2016 Y1 - 2016 CY - Darmstadt ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Arduini, Mariacarla T1 - An Attempt to Non-Destructively Qualify the Adhesion of Thermal Barrier Coatings BT - Tempmeko 2016 Y1 - 2016 CY - Zakopane (Polen) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark T1 - Construction, Calibration and Application of a LWIR Pyrometer within the EU Project STARGATE BT - Tempmeko 2016 N2 - The EU project STARGATE (Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines) has the headline objective to develop a suite of advanced sensors, instrumentation and related systems in order to contribute to the development of the next generation of green and efficient gas turbine engines. To increase the efficiency of gas turbines higher combustion temperatures and higher turbine inlet temperatures are required. This implies that turbine blades and vanes are exposed to higher temperatures. Advanced thermal barrier coatings (TBCs) based on ceramic materials protect the components from overheating and ensure mechanical integrity. Still, materials and coatings need to be stressed to their limits to reach the challenging goals of an efficiency increase. Under these circumstances, it is crucial to have sensing techniques available that are capable of accurately monitoring the temperature of turbine parts in order to prevent damages within the engine. The approach to overcome current limitations of existing techniques is to use long wavelength infrared (LWIR) pyrometry as TBCs are usually semi-transparent in the near or short wavelength infrared. Therefore one work package within the STARGATE project is dedicated to the development of a LWIR radiation thermometer to measure the surface temperature of TBCs contactless during operation of the gas turbine engines. The paper shortly gives an overview of the investigation performed within the STARGATE project. The construction, calibration and application of the LWIR radiation thermometer is described in detail and results obtained on a test facility are presented. The paper closes with an outlook on future plans of implementing the LWIR pyrometer in the quality system of gas turbine operation. Y1 - 2016 UR - https://www.researchgate.net/publication/341432336_CONSTRUCTION_CALIBRATION_AND_APPLICATION_OF_A_LWIR_PYROMETER_WITHIN_THE_EU_PROJECT_STARGATE CY - Zakopane (Polen) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark T1 - Long Wavelength Infrared Radiation Thermometry for Non-Contact Temperature Measurements in Gas Turbines BT - GTI Gas Turbine Instrumentation Conference Y1 - 2015 CY - London ER - TY - CHAP A1 - Hartmann, Jürgen T1 - New developments in high-temperature measurement techniques BT - Science in Practice 2014 Y1 - 2014 CY - Osijek (Kroatien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Ochs, Dennis A1 - Zänglein, Marc A1 - Manara, Jochen A1 - Arduini, Mariacarla A1 - Hemberger, Frank A1 - Vidi, Stephan T1 - Einsatz optischer Sensoranwendungen für additive Fertigungsverfahren BT - Werkstoffwoche 2019 Y1 - 2019 CY - Dresden ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Ochs, Dennis A1 - Zänglein, Marc A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Hemberger, Frank A1 - Vidi, Stephan A1 - Manara, Jochen A1 - Müller, Michael A1 - Möller, F. T1 - Systematische thermophysikalische Charakterisierung von Wärmedämmschichten BT - Sensoren und Messsysteme 2019 Y1 - 2019 CY - Nürnberg ER - TY - GEN A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Zänglein, Marc A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Brunner, Martin A1 - Müller, Michael T1 - Messsystem für dynamische Materialuntersuchung bei hohen Temperaturen BT - Sensoren und Messsysteme 2018 (Poster) Y1 - 2018 CY - Nürnberg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark T1 - Entwicklung und Test eines langwelligen Strahlungsthermometers zur berührungslosen Temperaturmessung in Gasturbinen während des Betriebs BT - Temperatur 2017 Y1 - 2017 SN - 978-3-944659-04-6 SP - 43 EP - 48 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Joumani, Y. A1 - Hay, B. A1 - Razouk, R. A1 - Anhalt, Klaus A1 - Sarge, S. A1 - Wu, J. A1 - Milosevic, N. A1 - Cataldi, M. A1 - Lorrette, C. A1 - Boboridis, K. A1 - Manara, Jochen A1 - Vidi, Stephan A1 - Pichler, P. A1 - Denner, T. T1 - EMPIR Hi-TRACE project – Metrological facilities for measuring thermophysical properties up to 3000 °C BT - Tempmeko 2019 Y1 - 2019 CY - Chengdu (China) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Zänglein, Marc A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Schmidt, Franz A1 - Brunner, Martin T1 - Optical Sensor systems for additive manufacturing BT - Tempmeko 2019 Y1 - 2019 CY - Chengdu (China) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Ochs, Dennis A1 - Zänglein, Marc A1 - Schreiber, Ekkehard A1 - Schmidt, Franz T1 - Experimental set-up for dynamic material investigation at high-temperatures for power engineering and additive manufacturing BT - 44. Freiburger Infrarot Kolloquium Y1 - 2019 CY - Freiburg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Knopp, Kevin A1 - Zänglein, Marc T1 - Hochtemperaturmessung und Materialuntersuchung für Energietechnik und additive Fertigungsverfahren BT - Werkstoffwoche 2017 Y1 - 2017 CY - Dresden ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Zipf, Matthias T1 - Non-contact temperature measurement of combustion gases at high temperatures and high pressures BT - European Conference on Thermophysical Properties 2017 Y1 - 2017 CY - Graz (Österreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - High temperature test-rig for emissvity and non-contact temperature measurements BT - European Conference on Thermophysical Properties 2017 Y1 - 2017 CY - Graz (Österreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus T1 - Radiometric measurements of eutectic fixed-point cells at PTB BT - SICE Annual Conference 2005 Y1 - 2005 CY - Okayama (Japan) ER - TY - CHAP A1 - Machin, Graham A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Beyon, G. A1 - Edler, F. A1 - Fourez, S. A1 - Jimeno-Largo, p. A1 - Lowe, D. A1 - Morice, R. A1 - Sadli, M. A1 - Villamanan, M. T1 - Future perspectives for high-temperature metrology from the FP5 HIMERT project BT - Metrologie 2005 Y1 - 2005 CY - Lyon (Frankreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Tegeler, E. T1 - Activities in the field of legal metrology and standardisation of clinical thermometers BT - Tempmeko 2004 Y1 - 2004 CY - Dubrovnik (Kroatien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Gutschwager, B. A1 - Hollandt, Jörg T1 - PTB Activities in the Field of Testing and Calibration of Clinical IR Ear Thermometers BT - IRS² 2004 Y1 - 2004 CY - Nürnberg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Machin, Graham A1 - Beynon, G. A1 - Fourrez, S. A1 - Lowe, D. A1 - Morice, R. A1 - Sadli, M. A1 - Villamanan, M. T1 - HIMERT: A pan-European project for development of metal-carbon eutectics as temperature standards BT - Temperature 2002 Y1 - 2002 CY - Chicago (USA) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, D. A1 - Hollandt, Jörg A1 - Fischer, J. T1 - Investigation of the accuracy of the ITS-90 with reference to thermodynamic temperature in the range from 400 °C to 600 °C BT - Temperature 2002 Y1 - 2002 CY - Chicago (USA) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - McEvoy, H.C. A1 - Machin, Graham A1 - Friedrich, R. A1 - Hollandt, Jörg T1 - Comparison of the new NPL primary standard Ag fixed-point blackbody source with the primary standard fixed-point of PTB BT - Temperature 2002 Y1 - 2002 CY - Chicago (USA) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Bloembergen, P. A1 - Sasajima, N. A1 - Yamada, Y. T1 - Comparing alternative schemes for realizing the high-temperature part of a future ITS-20XX with the aid of metal-carbon eutectic fixed points BT - Temperature 2002 Y1 - 2002 CY - Chicago (USA) ER - TY - GEN A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard A1 - Friedrich, R. A1 - Hollandt, Jörg T1 - Improved calibration of the spectral responsivity of interference filter radiometers in the visible and near infrared spectral range at PTB BT - Newrad 2002 (Poster) Y1 - 2002 CY - Gaithersburg (USA) ER - TY - GEN A1 - Hartmann, Jürgen A1 - Fischer, J. A1 - Seidel, J. T1 - Improved accuracy in measurement of radiometric apertures with a non-contact technique BT - Newrad’99 (Poster) Y1 - 1999 CY - Madrid (Spanien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Taubert, Dieter Richard A1 - Hollandt, Jörg T1 - Absolute radiometry for the MeP-K BT - The irradiance measurement method T2 - Tempmeko 2010 Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Krenek, S. A1 - Anhalt, Klaus A1 - Lindemann, A. A1 - Hollandt, Jörg T1 - A dynamic method to measure emissivity at high-temperatures BT - Tempmeko 2010 Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Keawprasert, T. A1 - Anhalt, Klaus A1 - Taubert, Dieter Richard A1 - Abd ElMageed, A. A1 - Sperling, A. T1 - Monochromator based absolute calibration of radiation thermometers BT - Tempmeko 2010 Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Schindler, A. A1 - Moriya, Y. A1 - Sarge, S. A1 - Pagel, R. A1 - Denner, T. T1 - Metal(carbide)-carbon eutectic high-temperature fixed-points for dynamic differential scanning calorimetry BT - Tempmeko 2010 Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - GEN A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Bünger, L. A1 - Schreiber, Ekkehard T1 - Practical high-temperature furnace for the application on thermometry and radiometry BT - Tempmeko 2010 (Poster) Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - GEN A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Machin, Graham A1 - Woolliams, E. A1 - Dury, M. A1 - Yoon, H. T1 - Absolute radiometry of metal-carbon eutectic fixed-points for a new temperature scale BT - Tempmeko 2010 (Poster) Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Völker, S. T1 - Thermisches Management von Lichtquellen BT - Sensoren und Messsysteme 2010 Y1 - 2010 CY - Nürnberg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Völker, S. T1 - Thermal Management an Lichtquellen BT - Temperatur 2009 Y1 - 2009 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard A1 - Monte, C. A1 - Baltruschat, C. A1 - Gutschwager, B. A1 - Hollandt, Jörg A1 - Kochems, D. A1 - Küchel, C. A1 - te Plate, M. T1 - Radiometric calibration of the NIRSpec instrument on the James Webb Space Telescope in the wavelength range from 0.7 µm to 5.0 µm BT - IRS² 2009 Y1 - 2009 UR - https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=a3bb797fd2e46dfe0b642a9a63dfac14a34b4d7c CY - Nürnberg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Schindler, A. A1 - Denner, T. A1 - Sarge, S. A1 - Pagel, R. T1 - Eurtektische Hochtemperatur Fixpunkte für die dynamische Differenzkalorimetrie BT - Sensoren und Messsysteme 2010 Y1 - 2010 CY - Nürnberg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard A1 - Monte, C. A1 - Gutschwager, B. A1 - Baltruschat, C. A1 - Hollandt, Jörg A1 - Kochems, D. A1 - Küchel, C. T1 - The Spectral Photon Flux of the Radiometric Calibration Spectral Source for the NIRSpec Instrument of the James Webb Space Telescope T2 - Proceedings of NEWRAD Y1 - 2008 SP - 79 EP - 80 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Monte, C. A1 - Anhalt, Klaus A1 - Gutschwager, B. A1 - Taubert, Dieter Richard A1 - Hollandt, Jörg T1 - Calibration of Radiation Thermometers and Measurement of Spectral Emissivity Traceable non-contact temperature measurements in industrial and scientific applications BT - VDI-Berichte 2011 T2 - Proceedings Sensoren und Messsysteme 2008 Y1 - 2008 SP - 249 EP - 261 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus T1 - Neuartige Hochtemperaturfixpunkte für die Photometrie, die Radiometrie und die Thermometrie BT - Proceedings der Licht 2006 Y1 - 2006 CY - Bern (Schweiz) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus T1 - Neuartige Metall-Kohlenstoff-Fixpunkte für die Anwendung in der Strahlungsthermometrie und der Radiometrie T2 - Temperatur 2006 Y1 - 2006 SP - 135 EP - 141 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus T1 - Novel High-temperature fixed-points for radiation thermometry, radiometry and photometry T2 - Proceedings of Sensoren and Messsysteme 2006 Y1 - 2006 SN - 978-3-8007-2939-5 SP - 145 EP - 148 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Edler, F. A1 - Anhalt, Klaus A1 - Schiller, S. T1 - Novel temperature standards for high-temperature calibration above 1100 °C T2 - Proceedings of Sensor 2005 Y1 - 2005 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Gutschwager, B. A1 - Hollandt, Jörg T1 - A novel lens-free high-accuracy InGaAs radiation thermometer for radiation temperatures above 300 °C T2 - VDI-Bericht 1784 Y1 - 2003 SP - 155 EP - 162 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Sakuma, F. A1 - Ma, L. T1 - Intercomparison of radiation temperatures scales between PTB and NMIJ from 1000 °C and 2500 °C T2 - Proceedings of SICE 2002 Y1 - 2002 SP - 111 EP - 115 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Gutschwager, B. A1 - Fischer, Joachim A1 - Hollandt, Jörg T1 - Calibration of thermal cameras for temperature measurements using blackbody radiation in the temperature range -60°C up to 3000 °C BT - AMA Service GmbH T2 - Proceedings of the International Conference Infrared Sensors & Systems Y1 - 2002 SP - 119 EP - 124 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Gutschwager, B. A1 - Fischer, Joachim A1 - Hollandt, Jörg T1 - Calibration of thermal cameras for temperature measurements using blackbody radiation in the temperature range –60 °C up to 3000 °C T2 - IRS² 2002 Y1 - 2002 CY - Erfurt ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard A1 - Monte, C. A1 - Gutschwager, B. A1 - Hollandt, Jörg T1 - Traceable Calibration of Radiation Sources from the Visible to the Far Infrared for Space Borne Applications at PTB BT - SPIE Konferenz Remote Sensing Y1 - 2009 CY - Berlin ER -