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

Research output: Chapter in Book/Report/Conference proceedingConference 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 languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Volume9144
ISBN (Print)9780819496126
DOIs
StatePublished - 2014
EventSpace Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray - Montreal, Canada
Duration: Jun 22 2014Jun 26 2014

Other

OtherSpace Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray
CountryCanada
CityMontreal
Period6/22/146/26/14

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

Fingerprint Dive into the research topics of 'Design improvements and x-ray performance of a time projection chamber polarimeter for persistent astronomical sources'. Together they form a unique fingerprint.

  • Cite this

    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