Proton-induced radiation damage in germanium detectors

High-purity germanium (HPGe) detectors will be used in future space missions for gamma-ray measurements and will be subject to interactions with energetic particles. To simulate this process, several large-volume n-type HPGe detectors were incrementally exposed to a particle fluence of up to 10/sup...

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Veröffentlicht in:	IEEE transactions on nuclear science 1991-04, Vol.38 (2), p.209-217
Hauptverfasser:	Bruckner, J., Korfer, M., Wanke, H., Schroeder, A.N.F., Filges, D., Dragovitsch, P., Englert, P.A.J., Starr, R., Trombka, J.I., Taylor, I., Drake, D.M., Shunk, E.R.
Format:	Artikel
Sprache:	eng
Schlagworte:	440200 - Radiation Effects on Instrument Components, Instruments, or Electronic Systems ANNEALING BARYONS ELEMENTARY PARTICLES Energy measurement Exact sciences and technology FERMIONS Gamma ray detection Gamma ray detectors GE SEMICONDUCTOR DETECTORS Germanium HADRONS HEAT TREATMENTS HIGH-PURITY GE DETECTORS INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY Instruments, apparatus, components and techniques common to several branches of physics and astronomy IRRADIATION MEASURING INSTRUMENTS NUCLEONS Other topics in instruments, apparatus, components and techniques common to several branches of physics and astronomy Particle measurements Physics PROTONS RADIATION DETECTORS RADIATION EFFECTS RESOLUTION SEMICONDUCTOR DETECTORS Shape SPACE FLIGHT Space missions Spacecraft Instrumentation Temperature
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Beschreibung
Zusammenfassung:	High-purity germanium (HPGe) detectors will be used in future space missions for gamma-ray measurements and will be subject to interactions with energetic particles. To simulate this process, several large-volume n-type HPGe detectors were incrementally exposed to a particle fluence of up to 10/sup 8/ protons cm/sup -2/ (proton energy: 1.5 GeV) at different operating temperatures (90 to 120 K) to induce radiation damage. Basic scientific and engineering data on detector performance were collected. During the incremental irradiation, the peak shape produced by the detectors showed a significant change from a Gaussian shape to a broad complex structure. After the irradiation, all detectors were thoroughly characterized by measuring many parameters. To remove the accumulated radiation damage, the detectors were stepwise-annealed at temperatures of T
ISSN:	0018-9499 1558-1578
DOI:	10.1109/23.289298