NDLI: Basic properties of gas electron multipliers for cosmic X-Ray polarimeters

Content Provider	IEEE Xplore Digital Library
Author	Iwahashi, T. Tamagawa, T. Hayato, A. Nakamura, S. Konami, S. Asami, F. Makishima, K. Yasuda, N. Kitamura, H. Sakurai, H. Tokanai, F.
Copyright Year	2008
Description	Author affiliation: RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan (Tamagawa, T.; Hayato, A.; Nakamura, S.; Konami, S.; Asami, F.; Makishima, K.) \|\| Yamagata University, 1-4-12 Kojirakawa, 990-8560, Japan (Sakurai, H.; Tokanai, F.) \|\| National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba-shi, Chiba 263-8555, Japan (Yasuda, N.; Kitamura, H.) \|\| RIKEN (The Institute of Physical and Chemical Resarch), 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan (Iwahashi, T.)
Abstract	A gas electron multiplier (GEM) is a key device for the photoelectric X-ray polarimeters, which will be launched in the near future. Our GEMs have spatial resolution enough for tracking of photoelectrons and low risk of discharge. GEMs need to perform well in all sorts of tolerance tests for space missions before launch. As a result of gain stability test after switching ON/OFF 6500 times repeatedly, our GEM gain variation is within ±2%. This repetition time scale corresponds to 2-year space mission in the Low Earth Orbit. As a result of charged particle (Fe) irradiation to GEM, our GEM survived more than 500 seconds of Fe ion irradiation (flux is 130 $cts/cm^{2}/s).$ This corresponds to 40-year irradiation in space. Thus, we conclude that our GEMs are stable enough for space missions and tolerance against discharge which is caused by charged particles.
Starting Page	1959
Ending Page	1962
File Size	8156311
Page Count	4
File Format	PDF
ISBN	9781424427147
ISSN	10957863
DOI	10.1109/NSSMIC.2008.4774770
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-19
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electron multipliers Spatial resolution Polarization Chemical lasers Liquid crystal polymers Space missions Magnetic field measurement Clouds Etching Testing
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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