Design improvements and x-ray performance of a time projection chamber polarimeter for persistent astronomical sources

Joanne E. Hill; J. Kevin Black; Thomas J. Emmett; Teruaki Enoto; Keith M. Jahoda; Philip Kaaret; David S Nolan; Toru Tamagawa

doi:10.1117/12.2057259

Design improvements and x-ray performance of a time projection chamber polarimeter for persistent astronomical sources

Joanne E. Hill, J. Kevin Black, Thomas J. Emmett, Teruaki Enoto, Keith M. Jahoda, Philip Kaaret, David S Nolan, Toru Tamagawa

Atmospheric Sciences

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

9 Scopus citations

Abstract

The design of the Time-Projection Chamber (TPC) Polarimeter for the Gravity and Extreme Magnetism Small Explorer (GEMS) was demonstrated to Technology Readiness Level 6 (TRL-6)³ and the flight detectors fabricated, assembled and performance tested. A single flight detector was characterized at the Brookhaven National Laboratory Synchrotron Light Source with polarized X-rays at 10 energies from 2.3-8.0 keV at five detector positions. The detector met all of the GEMS performance requirements. Lifetime measurements have shown that the existing flight design has 23 years of lifetime⁴, opening up the possibility of relaxing material requirements, in particular the consideration of the use of epoxy, to reduce risk elsewhere. We report on design improvements to the GEMS detector to enable a narrower transfer gap that, when operated with a lower transfer field, reduces asymmetries in the detector response. In addition, the new design reduces cost and risk by simplifying the assembly and reducing production time. Finally, we report on the performance of the narrow-gap detector in response to polarized and unpolarized X-rays.

Original language	English (US)
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Publisher	SPIE
Volume	9144
ISBN (Print)	9780819496126
DOIs	https://doi.org/10.1117/12.2057259
State	Published - 2014
Event	Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray - Montreal, Canada Duration: Jun 22 2014 → Jun 26 2014

Other

Other	Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray
Country	Canada
City	Montreal
Period	6/22/14 → 6/26/14

Keywords

Gas Electron Multiplier
GEMS.
Gravity and Extreme Magnetism Small explorer
X-ray Polarimetry

ASJC Scopus subject areas

Applied Mathematics
Computer Science Applications
Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1117/12.2057259

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Hill, J. E., Black, J. K., Emmett, T. J., Enoto, T., Jahoda, K. M., Kaaret, P., Nolan, D. S., & Tamagawa, T. (2014). Design improvements and x-ray performance of a time projection chamber polarimeter for persistent astronomical sources. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 9144). [91441N] SPIE. https://doi.org/10.1117/12.2057259

Design improvements and x-ray performance of a time projection chamber polarimeter for persistent astronomical sources. / Hill, Joanne E.; Black, J. Kevin; Emmett, Thomas J.; Enoto, Teruaki; Jahoda, Keith M.; Kaaret, Philip; Nolan, David S; Tamagawa, Toru.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9144 SPIE, 2014. 91441N.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hill, JE, Black, JK, Emmett, TJ, Enoto, T, Jahoda, KM, Kaaret, P, Nolan, DS & Tamagawa, T 2014, Design improvements and x-ray performance of a time projection chamber polarimeter for persistent astronomical sources. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 9144, 91441N, SPIE, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, Montreal, Canada, 6/22/14. https://doi.org/10.1117/12.2057259

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