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Proceedings Paper

RadSensor: x-ray detection by direct modulation of an optical probe beam
Author(s): Mark E. Lowry; Corey V Bennett; Stephen P Vernon; Tiziana Conese Bond; Rebecca Welty; Elaine M. Behymer; Holly E. Petersen; Adam Krey; Richard E. Stewart; Nobuhiko P. Kobayashi; Victor R. Sperry; Phillip L. Stephan; Cathy Reinhardt; Sean Simpson; Paul Stratton; Richard M Bionta; Mark A. McKernan; Elden Ables; Linda L. Ott; Steven W. Bond; Jay Ayers; Otto L. Landen; Perry M. Bell
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Paper Abstract

We present a new x-ray detection technique based on optical measurement of the effects of x-ray absorption and electron hole pair creation in a direct band-gap semiconductor. The electron-hole pairs create a frequency dependent shift in optical refractive index and absorption. This is sensed by simultaneously directing an optical carrier beam through the same volume of semiconducting medium that has experienced an xray induced modulation in the electron-hole population. If the operating wavelength of the optical carrier beam is chosen to be close to the semiconductor band-edge, the optical carrier will be modulated significantly in phase and amplitude. This approach should be simultaneously capable of very high sensitivity and excellent temporal response, even in the difficult high-energy xray regime. At xray photon energies near 10 keV and higher, we believe that sub-picosecond temporal responses are possible with near single xray photon sensitivity. The approach also allows for the convenient and EMI robust transport of high-bandwidth information via fiber optics. Furthermore, the technology can be scaled to imaging applications. The basic physics of the detector, implementation considerations, and preliminary experimental data are presented and discussed.

Paper Details

Date Published: 28 January 2004
PDF: 12 pages
Proc. SPIE 5194, Fourth-Generation X-Ray Sources and Ultrafast X-Ray Detectors, (28 January 2004); doi: 10.1117/12.509747
Show Author Affiliations
Mark E. Lowry, Lawrence Livermore National Lab. (United States)
Corey V Bennett, Lawrence Livermore National Lab. (United States)
Stephen P Vernon, Lawrence Livermore National Lab. (United States)
Tiziana Conese Bond, Lawrence Livermore National Lab. (United States)
Rebecca Welty, Lawrence Livermore National Lab. (United States)
Elaine M. Behymer, Lawrence Livermore National Lab. (United States)
Holly E. Petersen, Lawrence Livermore National Lab. (United States)
Adam Krey, Lawrence Livermore National Lab. (United States)
Richard E. Stewart, Lawrence Livermore National Lab. (United States)
Nobuhiko P. Kobayashi, Lawrence Livermore National Lab. (United States)
Victor R. Sperry, Lawrence Livermore National Lab. (United States)
Phillip L. Stephan, Lawrence Livermore National Lab. (United States)
Cathy Reinhardt, Lawrence Livermore National Lab. (United States)
Sean Simpson, Lawrence Livermore National Lab. (United States)
Paul Stratton, Lawrence Livermore National Lab. (United States)
Richard M Bionta, Lawrence Livermore National Lab. (United States)
Mark A. McKernan, Lawrence Livermore National Lab. (United States)
Elden Ables, Lawrence Livermore National Lab. (United States)
Linda L. Ott, Lawrence Livermore National Lab. (United States)
Steven W. Bond, Lawrence Livermore National Lab. (United States)
Jay Ayers, Lawrence Livermore National Lab. (United States)
Otto L. Landen, Lawrence Livermore National Lab. (United States)
Perry M. Bell, Lawrence Livermore National Lab. (United States)


Published in SPIE Proceedings Vol. 5194:
Fourth-Generation X-Ray Sources and Ultrafast X-Ray Detectors
Zenghu Chang; Roman O. Tatchyn; Jean-Claude Kieffer; Jerome B. Hastings, Editor(s)

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