@inproceedings{HartmannMachinBeynonetal., author = {Hartmann, J{\"u}rgen and Machin, Graham and Beynon, G. and Fourrez, S. and Lowe, D. and Morice, R. and Sadli, M. and Villamanan, M.}, title = {HIMERT: A pan-European project for development of metal-carbon eutectics as temperature standards}, address = {Chicago (USA)}, language = {en} } @inproceedings{HartmannTaubertHollandtetal., author = {Hartmann, J{\"u}rgen and Taubert, D. and Hollandt, J{\"o}rg and Fischer, J.}, title = {Investigation of the accuracy of the ITS-90 with reference to thermodynamic temperature in the range from 400 °C to 600 °C}, address = {Chicago (USA)}, language = {en} } @inproceedings{HartmannMcEvoyMachinetal., author = {Hartmann, J{\"u}rgen and McEvoy, H.C. and Machin, Graham and Friedrich, R. and Hollandt, J{\"o}rg}, title = {Comparison of the new NPL primary standard Ag fixed-point blackbody source with the primary standard fixed-point of PTB}, address = {Chicago (USA)}, language = {en} } @inproceedings{HartmannBloembergenSasajimaetal., author = {Hartmann, J{\"u}rgen and Bloembergen, P. and Sasajima, N. and Yamada, Y.}, title = {Comparing alternative schemes for realizing the high-temperature part of a future ITS-20XX with the aid of metal-carbon eutectic fixed points}, address = {Chicago (USA)}, language = {en} } @misc{HartmannTaubertFriedrichetal., author = {Hartmann, J{\"u}rgen and Taubert, Dieter Richard and Friedrich, R. and Hollandt, J{\"o}rg}, title = {Improved calibration of the spectral responsivity of interference filter radiometers in the visible and near infrared spectral range at PTB}, address = {Gaithersburg (USA)}, language = {en} } @misc{HartmannFischerSeidel, author = {Hartmann, J{\"u}rgen and Fischer, J. and Seidel, J.}, title = {Improved accuracy in measurement of radiometric apertures with a non-contact technique}, address = {Madrid (Spanien)}, language = {en} } @inproceedings{HartmannAnhaltTaubertetal., author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and Taubert, Dieter Richard and Hollandt, J{\"o}rg}, title = {Absolute radiometry for the MeP-K}, series = {Tempmeko 2010}, booktitle = {Tempmeko 2010}, address = {Portoroz (Slowenien)}, language = {en} } @inproceedings{HartmannKrenekAnhaltetal., author = {Hartmann, J{\"u}rgen and Krenek, S. and Anhalt, Klaus and Lindemann, A. and Hollandt, J{\"o}rg}, title = {A dynamic method to measure emissivity at high-temperatures}, address = {Portoroz (Slowenien)}, language = {en} } @inproceedings{HartmannKeawprasertAnhaltetal., author = {Hartmann, J{\"u}rgen and Keawprasert, T. and Anhalt, Klaus and Taubert, Dieter Richard and Abd ElMageed, A. and Sperling, A.}, title = {Monochromator based absolute calibration of radiation thermometers}, address = {Portoroz (Slowenien)}, language = {en} } @inproceedings{HartmannAnhaltSchindleretal., author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and Schindler, A. and Moriya, Y. and Sarge, S. and Pagel, R. and Denner, T.}, title = {Metal(carbide)-carbon eutectic high-temperature fixed-points for dynamic differential scanning calorimetry}, address = {Portoroz (Slowenien)}, language = {en} } @misc{HartmannAnhaltBuengeretal., author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and B{\"u}nger, L. and Schreiber, Ekkehard}, title = {Practical high-temperature furnace for the application on thermometry and radiometry}, address = {Portoroz (Slowenien)}, language = {en} } @misc{HartmannAnhaltMachinetal., author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and Machin, Graham and Woolliams, E. and Dury, M. and Yoon, H.}, title = {Absolute radiometry of metal-carbon eutectic fixed-points for a new temperature scale}, address = {Portoroz (Slowenien)}, language = {en} } @inproceedings{HartmannVoelker, author = {Hartmann, J{\"u}rgen and V{\"o}lker, S.}, title = {Thermisches Management von Lichtquellen}, address = {N{\"u}rnberg}, language = {de} } @inproceedings{HartmannVoelker, author = {Hartmann, J{\"u}rgen and V{\"o}lker, S.}, title = {Thermal Management an Lichtquellen}, address = {Berlin}, language = {de} } @inproceedings{HartmannTaubertMonteetal., author = {Hartmann, J{\"u}rgen and Taubert, Dieter Richard and Monte, C. and Baltruschat, C. and Gutschwager, B. and Hollandt, J{\"o}rg and Kochems, D. and K{\"u}chel, C. and te Plate, M.}, title = {Radiometric calibration of the NIRSpec instrument on the James Webb Space Telescope in the wavelength range from 0.7 µm to 5.0 µm}, address = {N{\"u}rnberg}, language = {en} } @inproceedings{HartmannAnhaltSchindleretal., author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and Schindler, A. and Denner, T. and Sarge, S. and Pagel, R.}, title = {Eurtektische Hochtemperatur Fixpunkte f{\"u}r die dynamische Differenzkalorimetrie}, address = {N{\"u}rnberg}, language = {de} } @inproceedings{HartmannTaubertMonteetal., author = {Hartmann, J{\"u}rgen and Taubert, Dieter Richard and Monte, C. and Gutschwager, B. and Baltruschat, C. and Hollandt, J{\"o}rg and Kochems, D. and K{\"u}chel, C.}, title = {The Spectral Photon Flux of the Radiometric Calibration Spectral Source for the NIRSpec Instrument of the James Webb Space Telescope}, series = {Proceedings of NEWRAD}, booktitle = {Proceedings of NEWRAD}, pages = {79 -- 80}, language = {en} } @inproceedings{HartmannMonteAnhaltetal., author = {Hartmann, J{\"u}rgen and Monte, C. and Anhalt, Klaus and Gutschwager, B. and Taubert, Dieter Richard and Hollandt, J{\"o}rg}, title = {Calibration of Radiation Thermometers and Measurement of Spectral Emissivity Traceable non-contact temperature measurements in industrial and scientific applications}, series = {Proceedings Sensoren und Messsysteme 2008}, booktitle = {Proceedings Sensoren und Messsysteme 2008}, pages = {249 -- 261}, language = {en} } @inproceedings{HartmannAnhalt, author = {Hartmann, J{\"u}rgen and Anhalt, Klaus}, title = {Neuartige Hochtemperaturfixpunkte f{\"u}r die Photometrie, die Radiometrie und die Thermometrie}, address = {Bern (Schweiz)}, language = {de} } @inproceedings{HartmannAnhalt, author = {Hartmann, J{\"u}rgen and Anhalt, Klaus}, title = {Neuartige Metall-Kohlenstoff-Fixpunkte f{\"u}r die Anwendung in der Strahlungsthermometrie und der Radiometrie}, series = {Temperatur 2006}, booktitle = {Temperatur 2006}, pages = {135 -- 141}, language = {de} } @inproceedings{HartmannAnhalt, author = {Hartmann, J{\"u}rgen and Anhalt, Klaus}, title = {Novel High-temperature fixed-points for radiation thermometry, radiometry and photometry}, series = {Proceedings of Sensoren and Messsysteme 2006}, booktitle = {Proceedings of Sensoren and Messsysteme 2006}, isbn = {978-3-8007-2939-5}, pages = {145 -- 148}, language = {en} } @inproceedings{HartmannEdlerAnhaltetal., author = {Hartmann, J{\"u}rgen and Edler, F. and Anhalt, Klaus and Schiller, S.}, title = {Novel temperature standards for high-temperature calibration above 1100 °C}, series = {Proceedings of Sensor 2005}, booktitle = {Proceedings of Sensor 2005}, language = {en} } @inproceedings{HartmannGutschwagerHollandt, author = {Hartmann, J{\"u}rgen and Gutschwager, B. and Hollandt, J{\"o}rg}, title = {A novel lens-free high-accuracy InGaAs radiation thermometer for radiation temperatures above 300 °C}, series = {VDI-Bericht 1784}, booktitle = {VDI-Bericht 1784}, pages = {155 -- 162}, language = {en} } @inproceedings{HartmannSakumaMa, author = {Hartmann, J{\"u}rgen and Sakuma, F. and Ma, L.}, title = {Intercomparison of radiation temperatures scales between PTB and NMIJ from 1000 °C and 2500 °C}, series = {Proceedings of SICE 2002}, booktitle = {Proceedings of SICE 2002}, pages = {111 -- 115}, language = {en} } @inproceedings{HartmannGutschwagerFischeretal., author = {Hartmann, J{\"u}rgen and Gutschwager, B. and Fischer, Joachim and Hollandt, J{\"o}rg}, title = {Calibration of thermal cameras for temperature measurements using blackbody radiation in the temperature range -60°C up to 3000 °C}, series = {Proceedings of the International Conference Infrared Sensors \& Systems}, booktitle = {Proceedings of the International Conference Infrared Sensors \& Systems}, pages = {119 -- 124}, language = {en} } @inproceedings{HartmannGutschwagerFischeretal., author = {Hartmann, J{\"u}rgen and Gutschwager, B. and Fischer, Joachim and Hollandt, J{\"o}rg}, title = {Calibration of thermal cameras for temperature measurements using blackbody radiation in the temperature range -60 °C up to 3000 °C}, series = {IRS² 2002}, booktitle = {IRS² 2002}, address = {Erfurt}, language = {en} } @inproceedings{HartmannTaubertMonteetal., author = {Hartmann, J{\"u}rgen and Taubert, Dieter Richard and Monte, C. and Gutschwager, B. and Hollandt, J{\"o}rg}, title = {Traceable Calibration of Radiation Sources from the Visible to the Far Infrared for Space Borne Applications at PTB}, address = {Berlin}, language = {en} } @inproceedings{HartmannKrenekAnhaltetal., author = {Hartmann, J{\"u}rgen and Krenek, S. and Anhalt, Klaus and Lindemann, A. and Monte, C. and Hollandt, J{\"o}rg}, title = {A study on the feasibility of measuring the emissivity with the laser-flash method}, address = {Boulder (USA)}, language = {en} } @inproceedings{HartmannWerner, author = {Hartmann, J{\"u}rgen and Werner, L.}, title = {Calibration and interpolation of the spectral responsivity of silicon photodiode based detectors}, address = {Dresden}, language = {en} } @misc{HartmannEdler, author = {Hartmann, J{\"u}rgen and Edler, F.}, title = {Simultaneous contact and non-contact measurements of the melting temperature of a N-C fixed-point cell}, address = {Banf (Kanada)}, language = {en} } @inproceedings{HartmannWerner, author = {Hartmann, J{\"u}rgen and Werner, L.}, title = {Radiation thermometry towards the triple point of water?}, address = {Banf (Kanada)}, language = {en} } @misc{HartmannAnhaltZelenjuketal., author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and Zelenjuk, A. and Taubert, Dieter Richard}, title = {New PTB Set-up for the absolute calibration of the spectral responsivity of radiation thermometers}, address = {Banf (Kanada)}, language = {en} } @inproceedings{HartmannMachinBloembergenetal., author = {Hartmann, J{\"u}rgen and Machin, Graham and Bloembergen, P. and Sadli, M. and Yamada, Y.}, title = {A concerted international project to establish hig-temperature fixed-points for primary thermometry}, address = {Banf (Kanada)}, language = {en} } @misc{HartmannSadliAnhaltetal., author = {Hartmann, J{\"u}rgen and Sadli, M. and Anhalt, Klaus and Schiller, S.}, title = {Thermal effects in the bb3200pg on m-c eutectic implementation}, address = {Banf (Kanada)}, language = {en} } @inproceedings{HartmannAnhaltWangetal., author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and Wang, Y. and Yamada, Y.}, title = {Large and small aperture Fixed-point cells of Cu, Pt-C, and Re-c}, address = {Banf (Kanada)}, language = {en} } @inproceedings{HartmannAnhaltLoweetal., author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and Lowe, D. and Machin, G. and Sadli, M. and Yamada, Y.}, title = {Thermodynamic Temperature determination of Co-C, Pd-C, Pt-C, and Ru-C eutectic fixed point cells}, address = {Davos (Schweiz)}, language = {en} } @inproceedings{BlotevogelEgermannGoldlueckeetal., author = {Blotevogel, Thomas and Egermann, Jan and Goldl{\"u}cke, J{\"u}rgen and Leipertz, Alfred and Hartmann, Matthias and Schenk, Martin and Berckm{\"u}ller, Martin}, title = {Untersuchungen zur Gemsichbildung in Wasserstoffmotoren}, editor = {Leipertz, Alfred}, publisher = {Esytec}, address = {Erlangen}, isbn = {3-931901-27-0}, pages = {12}, abstract = {Mittels der planaren laserinduzierten Fluoreszenz (PLIF) k{\"o}nnen im Brennraum eines Transparentmotors Messungen durchgef{\"u}hrt werden, die den Gemischbildungsprozess beim Wasserstoffmotor zweidimensional qualitativ darstellen. Auch quantitative Messungen und damit Aussagen {\"u}ber das Kraftstoff-Luft-Verh{\"a}ltnis im Brennraum sind m{\"o}glich. F{\"u}r diese Messungen wird ein Gasgemisch ans Helium und einer Tracersubstanz verwendet, und der Motor wird geschleppt. Bei Betrieb des Motors in der Teillast sind auch Messungen im gefeuerten Betrieb, d.h. mit Wasserstoff und zugesetzter Tracersubstanz, m{\"o}glich. Durch direkte Messung des Kraftstoff-Luft-Verh{\"a}ltnisses und der Wasserstoffkonzentration am befeuerten Aggregat mit Hilfe der Raman-Spektroskopie konnte nachgewiesen werden, daß mittels PLIF der Einstr{\"o}mvorgang qualitativ und das Kraftstoff-Luft-Verh{\"a}ltnis quantitativ grunds{\"a}tzlich richtig erfaßt werden. Qualitative und quantitative PLIF-Messungen sind prinzipiell nicht nur bei Wasserstoffmotoren, sondern auch bei Gasmotoren mit anderen Brenngasen denkbar. Allerdings sind noch weitere Arbeiten erforderlich, um den Quantifizierungsfehler deutlich abzusenken. Zuk{\"u}nftiges Verbesserungspotential f{\"u}r diese Meßtechnik besteht in verschiedenen Punkten. Dazu geh{\"o}rt die Optimierung und Anpassung der Mischstrecke zur Erzeugung des Gas-Luft-Gemisches mit definiertem Kraftstoff-Luft-Verh{\"a}ltnis an die jeweiligen Meßaufgaben, um den relativen Fehler des Lambda-Wertes noch weiter zu reduzieren. Eine Verringerung der Tracerkonzentration erscheint problemlos m{\"o}glich. Um das Problem der Hintergrundfluoreszenz zu l{\"o}sen, sind verschiedene M{\"o}glichkeiten denkbar, die noch genauer zu untersuchen sind.}, language = {de} } @article{HartmannMachinBloembergenetal., author = {Hartmann, J{\"u}rgen and Machin, Graham and Bloembergen, P. and Anhalt, Klaus and Sadli, M. and Saunders, P. and Woolliams, E. and Yamada, Y. and Yoon, H.}, title = {Practical implementation of the mise-en-pratique for the definition of the Kelvin above the silver point}, series = {International Journal of Thermophysics}, journal = {International Journal of Thermophysics}, number = {31}, pages = {1779 -- 1788}, language = {en} } @article{HartmannKhlevnoyRougieetal., author = {Hartmann, J{\"u}rgen and Khlevnoy, B. and Rougie, B. and Gibson, C. and Yoon, H. and Gaertner, A. and Taubert, Dieter Richard}, title = {CCPR-S1 Supplementary Comparison for Spectral Radiance in the range of 220 nm to 2500 nm}, series = {Metrologia}, journal = {Metrologia}, number = {46}, pages = {174 -- 180}, language = {en} } @article{HartmannKrenekAnhaltetal., author = {Hartmann, J{\"u}rgen and Krenek, S. and Anhalt, Klaus and Lindemann, A. and Hollandt, J{\"o}rg}, title = {A study on the feasibility of measuring the emissivity with the laser-flash method}, series = {International Journal of Thermophysics}, journal = {International Journal of Thermophysics}, number = {31}, pages = {998 -- 1010}, language = {en} } @article{HartmannAnhaltLindneretal., author = {Hartmann, J{\"u}rgen and Anhalt, Klaus and Lindner, D. and Kr{\"u}ger, U.}, title = {Camera based investigation of high-temperature fixed-points for radiometric application}, series = {Metrologia}, journal = {Metrologia}, number = {46}, pages = {260 -- 265}, language = {en} } @article{HartmannOjanenAnhaltetal., author = {Hartmann, J{\"u}rgen and Ojanen, M. and Anhalt, Klaus and Schiller, S. and Weckstr{\"o}m, T. and K{\"a}rh{\"a}, P. and Heinonen, M. and Ikonen, E.}, title = {Comparison of the radiation temperature scales between MIKES and PTB}, series = {Measurement}, journal = {Measurement}, number = {43}, pages = {183 -- 189}, language = {en} } @article{HoefflinSauerSchiffleretal., author = {H{\"o}fflin, Dennis and Sauer, Christian and Schiffler, Andreas and Hartmann, J{\"u}rgen}, title = {Process Monitoring Using Synchronized Path Infrared Thermography in PBF-LB/M}, series = {Sensors}, volume = {22}, journal = {Sensors}, number = {16}, publisher = {MDPI}, doi = {10.3390/s22165943}, pages = {5943}, abstract = {Additive manufacturing processes, particularly Laser-Based Powder Bed Fusion of Metals (PBF-LB/M), enable the development of new application possibilities due to their manufacturing-specific freedom of design. These new fields of application require a high degree of component quality, especially in safety-relevant areas. This is currently ensured primarily via a considerable amount of downstream quality control. Suitable process monitoring systems promise to reduce this effort drastically. This paper introduces a novel monitoring method in order to gain process-specific thermal information during the manufacturing process. The Synchronized Path Infrared Thermography (SPIT) method is based on two synchronized galvanometer scanners allowing high-speed and high-resolution observations of the melt pool in the SWIR range. One scanner is used to steer the laser over the building platform, while the second scanner guides the field of view of an IR camera. With this setup, the melting process is observed at different laser powers, scan speeds and at different locations with respect to the laser position, in order to demonstrate the positioning accuracy of the system and to initially gain thermal process data of the melt pool and the heat-affected zone. Therefore, the SPIT system shows a speed independent overall accuracy of ±2 Pixel within the evaluated range. The system further allows detailed thermal observation of the melt pool and the surrounding heat-affected zone.}, language = {en} } @incollection{HartmannHollandtSakumaetal., author = {Hartmann, J{\"u}rgen and Hollandt, J{\"o}rg and Sakuma, F. and Khlevnoy, B. and Morozova, S.}, title = {Blackbody and other Calibration Sources, in Radiometric Temperature Measurements Part I Fundamentals}, series = {Experimental Methods in the Physical Sciences}, volume = {42}, booktitle = {Experimental Methods in the Physical Sciences}, editor = {Zhang, Z.M. and Tsai, B.K. and Machin, Graham}, publisher = {Elsevier Academic Press}, address = {Amsterdam}, isbn = {978-0-12-374021-2}, pages = {241 -- 295}, language = {en} } @article{HartmannWernerFischeretal., author = {Hartmann, J{\"u}rgen and Werner, L. and Fischer, J. and Johannsen, U.}, title = {Accurate determination of the spectral responsivity of silicon trap detectors between 238 nm and 1015 nm using a laser-based cryogenic radiometer}, series = {Metrologia}, journal = {Metrologia}, number = {37}, pages = {279 -- 284}, language = {en} } @article{HartmannVoigtReichling, author = {Hartmann, J{\"u}rgen and Voigt, P. and Reichling, M.}, title = {Measuring local thermal conductivity in polycrystalline diamond with a high resolution photothermal microscope}, series = {J. Appl. Phys.}, journal = {J. Appl. Phys.}, number = {81}, pages = {2966 -- 2977}, language = {en} } @article{HartmannFischerSeidel, author = {Hartmann, J{\"u}rgen and Fischer, J. and Seidel, J.}, title = {A non-contact technique providing improved accuracy in area measurements of radiometric apertures}, series = {Metrologia}, journal = {Metrologia}, number = {37}, pages = {637 -- 640}, language = {en} } @article{HartmannWerner, author = {Hartmann, J{\"u}rgen and Werner, L.}, title = {Calibration and interpolation of the spectral responsivity of silicon photodiode based detectors}, series = {Sensors \& Actuators A: Physical}, journal = {Sensors \& Actuators A: Physical}, number = {156}, pages = {185 -- 190}, language = {en} } @article{HartmannKlotzbuecherReichling, author = {Hartmann, J{\"u}rgen and Klotzb{\"u}cher, T. and Reichling, M.}, title = {Local variation of room temperature thermal conductivity in high quality polycrystalline diamond}, series = {Appl. Phys. Lett.}, journal = {Appl. Phys. Lett.}, number = {73}, pages = {756 -- 758}, language = {en} } @article{HartmannCostelloReichling, author = {Hartmann, J{\"u}rgen and Costello, M. and Reichling, M.}, title = {The influence of thermal barriers on heat flow in high quality chemical vapour deposited diamond}, series = {Phys. Rev. Lett.}, journal = {Phys. Rev. Lett.}, number = {80}, pages = {117 -- 120}, language = {en} }