Zitieren Sie bitte immer diesen URN: urn:nbn:de:kobv:b43-323075
A comparative study on the performance of digital detector systems for high energy applications
- For cast components reaching or exceeding total material thicknesses of 150mm, high energy sources such as linear accelerators or Betatrons are required in order to obtain reasonable exposure times. In this study, the performance of digital detector systems, involving imaging plates (IP) and digital detector arrays (DDA), was evaluated with respect to the testing class B requirements as formulated in the standard EN ISO 17636-2. As a reference, traditional radiographic film and a Cobalt-60 source was used. With film exposures, testing class B was achieved with Co-60 and Betatron (7.5 MV) at longer exposure times. The preliminary results show that the testing class B was not obtained with the examined digital detector arrays (DDA) and the high resolution imaging plates (IP) , even at 40, 60 and 80 minutes exposure time with a 7.5 MV Betatron. Class A was achieved using high resolution imaging plates with optimized metal filters between object and IPs and a high resolution DDA withFor cast components reaching or exceeding total material thicknesses of 150mm, high energy sources such as linear accelerators or Betatrons are required in order to obtain reasonable exposure times. In this study, the performance of digital detector systems, involving imaging plates (IP) and digital detector arrays (DDA), was evaluated with respect to the testing class B requirements as formulated in the standard EN ISO 17636-2. As a reference, traditional radiographic film and a Cobalt-60 source was used. With film exposures, testing class B was achieved with Co-60 and Betatron (7.5 MV) at longer exposure times. The preliminary results show that the testing class B was not obtained with the examined digital detector arrays (DDA) and the high resolution imaging plates (IP) , even at 40, 60 and 80 minutes exposure time with a 7.5 MV Betatron. Class A was achieved using high resolution imaging plates with optimized metal filters between object and IPs and a high resolution DDA with intermediate Cu filters. Class A was also achieved applying a DDA with lower basic spatial resolution than required by Table B.13 of EN ISO 17636-2, but using the compensation principle as described in this standard. The next generation of digital detector arrays might potentially be able to obtain class B performance with the expected spatial resolution and sensitivity improvements.…
Autor*innen: | A. Schumm, E. Martin, M. Beaumont, Uwe Ewert, Sanjeevareddy Kolkoori, Uwe ZscherpelORCiD, Norma Wrobel, Bernhard Redmer |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Graue Literatur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | The e-journal of nondestructive testing & ultrasonics |
Jahr der Erstveröffentlichung: | 2014 |
Veröffentlichende Institution: | Bundesanstalt für Materialforschung und -prüfung (BAM) |
Verlag: | NDT.net |
Verlagsort: | Kirchwald |
Jahrgang/Band: | 19 |
Ausgabe/Heft: | 12 |
Aufsatznummer: | 16394 |
Erste Seite: | 1 |
Letzte Seite: | 6 |
DDC-Klassifikation: | Naturwissenschaften und Mathematik / Chemie / Analytische Chemie |
Freie Schlagwörter: | Betatron; Casting; Comparison of detectors; Digital detector array (DDA); High energy radiography; Image quality; Radiography; Standards; Steel weldment |
Veranstaltung: | ECNDT 2014 - 11th European conference on non-destructive testing |
Veranstaltungsort: | Prague, Czech Republic |
Beginndatum der Veranstaltung: | 06.10.2014 |
Enddatum der Veranstaltung: | 10.10.2014 |
URN: | urn:nbn:de:kobv:b43-323075 |
URL: | https://www.ndt.net/?id=16394 |
ISSN: | 1435-4934 |
Verfügbarkeit des Dokuments: | Datei für die Öffentlichkeit verfügbar ("Open Access") |
Lizenz (Deutsch): | Creative Commons - Namensnennung-Keine Bearbeitung |
Datum der Freischaltung: | 20.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 18.12.2014 |
Schriftenreihen ohne Nummerierung: | Wissenschaftliche Artikel der BAM |