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The effects of 199 MeV proton radiation damage on CdZnTe photon detectors

Four CdZnTe detectors were irradiated with 199 MeV protons to simulate the damaging radiation in space. The gamma-ray spectra of /sup 241/Am and /sup 57/Co as well as the detector leakage currents were monitored at room temperature to assess the effects of radiation damage. Surprisingly, after a flu...

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Main Authors:	Hull, E.L., Pehl, R.H., Varnell, L.S.
Format:	Conference Proceeding
Language:	English
Subjects:	Degradation Gamma ray detection Gamma ray detectors Gas detectors Germanium Leak detection Leakage current Protons Radiation detectors Temperature measurement
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creator	Hull, E.L. Pehl, R.H. Varnell, L.S.
description	Four CdZnTe detectors were irradiated with 199 MeV protons to simulate the damaging radiation in space. The gamma-ray spectra of /sup 241/Am and /sup 57/Co as well as the detector leakage currents were monitored at room temperature to assess the effects of radiation damage. Surprisingly, after a fluence of a few x10/sup 8/ p/cm/sup 2/, gamma-ray peak shifts and resolution degradation became visible. After a fluence of 5/spl times/10/sup 9/ p/cm/sup 2/ the degradation was quite dramatic. An analysis of these effects clearly demonstrates that radiation damage causes electron trapping in CdZnTe detectors. No increase in leakage current or electronic noise was observed. Radiation damage effects in CdZnTe and germanium detectors are compared. CdZnTe detectors are /spl sim/250 times more sensitive to radiation damage than germanium detectors per unit charge-drift distance.
doi_str_mv	10.1109/NSSMIC.1996.591507
format	conference_proceeding
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The gamma-ray spectra of /sup 241/Am and /sup 57/Co as well as the detector leakage currents were monitored at room temperature to assess the effects of radiation damage. Surprisingly, after a fluence of a few x10/sup 8/ p/cm/sup 2/, gamma-ray peak shifts and resolution degradation became visible. After a fluence of 5/spl times/10/sup 9/ p/cm/sup 2/ the degradation was quite dramatic. An analysis of these effects clearly demonstrates that radiation damage causes electron trapping in CdZnTe detectors. No increase in leakage current or electronic noise was observed. Radiation damage effects in CdZnTe and germanium detectors are compared. CdZnTe detectors are /spl sim/250 times more sensitive to radiation damage than germanium detectors per unit charge-drift distance.</description><identifier>ISSN: 1082-3654</identifier><identifier>ISBN: 0780335341</identifier><identifier>ISBN: 9780780335349</identifier><identifier>EISSN: 2577-0829</identifier><identifier>DOI: 10.1109/NSSMIC.1996.591507</identifier><language>eng</language><publisher>IEEE</publisher><subject>Degradation ; Gamma ray detection ; Gamma ray detectors ; Gas detectors ; Germanium ; Leak detection ; Leakage current ; Protons ; Radiation detectors ; Temperature measurement</subject><ispartof>1996 IEEE Nuclear Science Symposium. 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CdZnTe detectors are /spl sim/250 times more sensitive to radiation damage than germanium detectors per unit charge-drift distance.</description><subject>Degradation</subject><subject>Gamma ray detection</subject><subject>Gamma ray detectors</subject><subject>Gas detectors</subject><subject>Germanium</subject><subject>Leak detection</subject><subject>Leakage current</subject><subject>Protons</subject><subject>Radiation detectors</subject><subject>Temperature measurement</subject><issn>1082-3654</issn><issn>2577-0829</issn><isbn>0780335341</isbn><isbn>9780780335349</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>1996</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><recordid>eNp9js0OgjAQhDf-JKLyAp76AmBrKdAz0egBLxAPXkgji2KUkpaLb2-jnt3LfpmdmSzAitGQMSrXx6LID1nIpIxDIZmgyQi8jUiSgKYbOYY5TVLKueARm4DHnBjwWEQz8K29UzeREM7uwaG8IcGmwctgiW6IayQ5nkhv9KA7YlTdqqF1VKunuiJxlNXnrkTS3z6OGgeX1cYuYdqoh0X_txew2m3LbB-0iFj1pn0q86q-z_K_xzeNHT6i</recordid><startdate>1996</startdate><enddate>1996</enddate><creator>Hull, E.L.</creator><creator>Pehl, R.H.</creator><creator>Varnell, L.S.</creator><general>IEEE</general><scope>6IE</scope><scope>6IL</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIL</scope></search><sort><creationdate>1996</creationdate><title>The effects of 199 MeV proton radiation damage on CdZnTe photon detectors</title><author>Hull, E.L. ; Pehl, R.H. ; Varnell, L.S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-ieee_primary_5915073</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>1996</creationdate><topic>Degradation</topic><topic>Gamma ray detection</topic><topic>Gamma ray detectors</topic><topic>Gas detectors</topic><topic>Germanium</topic><topic>Leak detection</topic><topic>Leakage current</topic><topic>Protons</topic><topic>Radiation detectors</topic><topic>Temperature measurement</topic><toplevel>online_resources</toplevel><creatorcontrib>Hull, E.L.</creatorcontrib><creatorcontrib>Pehl, R.H.</creatorcontrib><creatorcontrib>Varnell, L.S.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan All Online (POP All Online) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE/IET Electronic Library (IEL)</collection><collection>IEEE Proceedings Order Plans (POP All) 1998-Present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Hull, E.L.</au><au>Pehl, R.H.</au><au>Varnell, L.S.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>The effects of 199 MeV proton radiation damage on CdZnTe photon detectors</atitle><btitle>1996 IEEE Nuclear Science Symposium. Conference Record</btitle><stitle>NSSMIC</stitle><date>1996</date><risdate>1996</risdate><volume>2</volume><spage>959</spage><epage>962 vol.2</epage><pages>959-962 vol.2</pages><issn>1082-3654</issn><eissn>2577-0829</eissn><isbn>0780335341</isbn><isbn>9780780335349</isbn><abstract>Four CdZnTe detectors were irradiated with 199 MeV protons to simulate the damaging radiation in space. The gamma-ray spectra of /sup 241/Am and /sup 57/Co as well as the detector leakage currents were monitored at room temperature to assess the effects of radiation damage. Surprisingly, after a fluence of a few x10/sup 8/ p/cm/sup 2/, gamma-ray peak shifts and resolution degradation became visible. After a fluence of 5/spl times/10/sup 9/ p/cm/sup 2/ the degradation was quite dramatic. An analysis of these effects clearly demonstrates that radiation damage causes electron trapping in CdZnTe detectors. No increase in leakage current or electronic noise was observed. Radiation damage effects in CdZnTe and germanium detectors are compared. CdZnTe detectors are /spl sim/250 times more sensitive to radiation damage than germanium detectors per unit charge-drift distance.</abstract><pub>IEEE</pub><doi>10.1109/NSSMIC.1996.591507</doi></addata></record>
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identifier	ISSN: 1082-3654
ispartof	1996 IEEE Nuclear Science Symposium. Conference Record, 1996, Vol.2, p.959-962 vol.2
issn	1082-3654 2577-0829
language	eng
recordid	cdi_ieee_primary_591507
source	IEEE Electronic Library (IEL) Conference Proceedings
subjects	Degradation Gamma ray detection Gamma ray detectors Gas detectors Germanium Leak detection Leakage current Protons Radiation detectors Temperature measurement
title	The effects of 199 MeV proton radiation damage on CdZnTe photon detectors
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