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Proceedings Paper

The design and qualification of the GEMS X-ray polarimeters
Author(s): J. E. Hill; R. G Baker; J. K. Black; M. J. Browne; W. H. Baumgartner; E. M. Caldwell; J. D. Cantwell; A. Davies; A. B. Desai; P. L. Dickens; N. K. Dobson; R. L. Foxwell; A. S. Francomacaro; D. Gall; K. J. Gregory; S. Griffiths; A. Hayato; R. O. Hampshire; T. Hwang; M. D. Jhabvala ; K. Jahoda; P. Kaaret; S. J. Lehtonen; N. F. Martin; J. S. Mohammed; K. Montt de Garcia; A. Morell; D. S. Nolan; R. E. Russell; M. A. Sampson; J. A. Sanders; K. Simms; M. J. Singer; J. H. Swank; T. Tamagawa; A. Weaver; S. N. Yerushalmi; J. J. Xu
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Paper Abstract

The Gravity and Extreme Magnetism Small Explorer (GEMS) will realize its scientific objectives through high sensitivity linear X-ray polarization measurements in the 2-10 keV band. The GEMS X-ray polarimeters, based on the photoelectric effect, provide a strong polarization response with high quantum efficiency over a broad band-pass by a novel implementation of the time projection chamber (TPC). This paper will discuss the basic principles of the TPC polarimeter and describe the details of the mechanical and electrical design of the GEMS flight polarimeter. We will present performance measurements from two GEMS engineering test units in response to polarized and unpolarized X-rays and before and after thermal and vibration tests performed to demonstrate that the design is at a technology readiness level 6 (TRL-6).

Paper Details

Date Published: 17 September 2012
PDF: 13 pages
Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 84431Q (17 September 2012); doi: 10.1117/12.928435
Show Author Affiliations
J. E. Hill, NASA Goddard Space Flight Ctr. (United States)
R. G Baker, NASA Goddard Space Flight Ctr. (United States)
Sigma Space Corp. (United States)
J. K. Black, NASA Goddard Space Flight Ctr. (United States)
Rock Creek Scientific (United States)
M. J. Browne, NASA Goddard Space Flight Ctr. (United States)
SGT Inc. (United States)
W. H. Baumgartner, NASA Goddard Space Flight Ctr. (United States)
CRESST/Univ. of Maryland (United States)
E. M. Caldwell, NASA Goddard Space Flight Ctr. (United States)
J. D. Cantwell, NASA Goddard Space Flight Ctr. (United States)
SGT Inc. (United States)
A. Davies, NASA Goddard Space Flight Ctr. (United States)
A. B. Desai, NASA Goddard Space Flight Ctr. (United States)
P. L. Dickens, NASA Goddard Space Flight Ctr. (United States)
SGT Inc. (United States)
N. K. Dobson, NASA Goddard Space Flight Ctr. (United States)
R. L. Foxwell, NASA Goddard Space Flight Ctr. (United States)
Jackson and Tull (United States)
A. S. Francomacaro, Johns Hopkins Univ. Applied Physics Lab. (United States)
D. Gall, Univ. of Iowa (United States)
K. J. Gregory, NASA Goddard Space Flight Ctr. (United States)
S. Griffiths, The Univ. of Iowa (United States)
A. Hayato, NASA Goddard Space Flight Ctr. (United States)
RIKEN (Japan)
R. O. Hampshire, NASA Goddard Space Flight Ctr. (United States)
SGT Inc. (United States)
T. Hwang, NASA Goddard Space Flight Ctr. (United States)
Bastion Technologies, Inc (United States)
M. D. Jhabvala , NASA Goddard Space Flight Ctr. (United States)
K. Jahoda, NASA Goddard Space Flight Ctr. (United States)
P. Kaaret, The Univ. of Iowa (United States)
S. J. Lehtonen, Johns Hopkins Univ. Applied Physics Lab. (United States)
N. F. Martin, NASA Goddard Space Flight Ctr. (United States)
J. S. Mohammed, NASA Goddard Space Flight Ctr. (United States)
K. Montt de Garcia, NASA Goddard Space Flight Ctr. (United States)
A. Morell, NASA Goddard Space Flight Ctr. (United States)
D. S. Nolan, NASA Goddard Space Flight Ctr. (United States)
SGT Inc. (United States)
R. E. Russell, NASA Goddard Space Flight Ctr. (United States)
SGT Inc. (United States)
M. A. Sampson, NASA Goddard Space Flight Ctr. (United States)
SGT Inc. (United States)
J. A. Sanders, NASA Goddard Space Flight Ctr. (United States)
Vantage Systems Inc. (United States)
K. Simms, NASA Goddard Space Flight Ctr. (United States)
M. J. Singer, NASA Goddard Space Flight Ctr. (United States)
SGT Inc. (United States)
J. H. Swank, NASA Goddard Space Flight Ctr. (United States)
T. Tamagawa, RIKEN (Japan)
A. Weaver, NASA Goddard Space Flight Ctr. (United States)
Vantage Systems Inc. (United States)
S. N. Yerushalmi, NASA Goddard Space Flight Ctr. (United States)
SGT Inc. (United States)
J. J. Xu, NASA Goddard Space Flight Ctr. (United States)
Bastion Technologies, Inc (United States)


Published in SPIE Proceedings Vol. 8443:
Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray
Tadayuki Takahashi; Stephen S. Murray; Jan-Willem A. den Herder, Editor(s)

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