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Proceedings Paper

Sensitive gas tube near-UV photon-counting detector based on excited-state photoionization
Author(s): Norman S. Kopeika; J. Peleg; Moshe Cohen; A. Abramovitch
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Paper Abstract

Photoionization of excited states is the mechanism of detection in gas tube UV photon counting detectors of high sensitivity and variable spectral response. Because of bias to the prebreakdown region, noise current is on the order of only 10-14 A(DOT)Hz-1/2. Spectral response varies according to gas quantum structure and pressure. High gas pressures shift spectral response to shorter wavelengths while lower pressures shift it to longer wavelengths and broaden it. One detector version is therefore almost solar blind. Another exhibits almost flat spectral response over most of the near UV band. In all cases, response falls off strongly with increasing wavelengths at longer UV wavelengths. Picowatt UV radiant powers yield about 1000 counts per minute. Response gamma is fairly constant up towards the microwatt radiant power range before falling off.

Paper Details

Date Published: 12 July 1994
PDF: 8 pages
Proc. SPIE 2278, X-Ray and UV Detectors, (12 July 1994); doi: 10.1117/12.180006
Show Author Affiliations
Norman S. Kopeika, Ben-Gurion Univ. of the Negev (Israel)
J. Peleg, Ben-Gurion Univ. of the Negev (Israel)
Moshe Cohen, Ben-Gurion Univ. of the Negev (Israel)
A. Abramovitch, Ben-Gurion Univ. of the Negev (Israel)

Published in SPIE Proceedings Vol. 2278:
X-Ray and UV Detectors
Richard B. Hoover; Mark W. Tate, Editor(s)

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