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Optical Engineering

Optical imaging chamber for x-ray astronomy
Author(s): Robert A. Austin; Brian D. Ramsey
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Paper Abstract

The light emitted by electron avalanches in a parallel plate chamber can be used to image the tracks of photoelectrons liberated by the interaction of an incident x-ray with the gas filling the chamber. The differing morphologies of photoelectron tracks and high-energy charged particle tracks can be used for background rejection. The initial direction (before scattering) of the liberated photoelectron also contains information about the polarization of the incident radiation. We have built a small test chamber with which we have imaged photoelectron tracks using an intensified CCD camera. Our results show that optical imaging could be used in a hard x-ray imaging polarimeter useful for astronomy.

Paper Details

Date Published: 1 August 1993
PDF: 5 pages
Opt. Eng. 32(8) doi: 10.1117/12.147148
Published in: Optical Engineering Volume 32, Issue 8
Show Author Affiliations
Robert A. Austin, NASA Marshall Space Flight Ctr. (United States)
Brian D. Ramsey, NASA Marshall Space Flight Ctr. (United States)


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