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Proceedings Paper

Measurement of transparency of thin beryllium x-ray windows by means of fluorescense lines produced by a Cm244 alpha source
Author(s): Claudio Gizzi; Giorgio Patria; Tor Andersson; Maria Nerina Cinti; Enrico Costa; Philip E. Kaaret; Paolo Soffitta; John A. Tomsick
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Paper Abstract

We present the results of the measurement of transparency of five round beryllium windows for the LEIPC (low energy imaging proportional counter) of the stellar x-ray polarimeter (SXRP) experiment which will be flown on board the spectrum x-gamma Russian satellite. Each window was tested across its entire surface by using an x-ray fluorescence beam produced by a Cm244 alpha source. We mapped the physical properties of the whole set in order either to verify the performance of the manufacturing method and to select the window having the highest counting rate and the most homogeneous transparency. This is crucial in order to both enhance the scientific capability of the experiment and to reduce the impact of possible systematic effects due to pointing instability which could occur during the observation of celestial sources.

Paper Details

Date Published: 15 October 1997
PDF: 8 pages
Proc. SPIE 3114, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII, (15 October 1997); doi: 10.1117/12.283800
Show Author Affiliations
Claudio Gizzi, Instituto di Astofisica Spaziale (Italy)
Giorgio Patria, Instituto di Astofisica Spaziale (Italy)
Tor Andersson, Metorex International Oy (Finland)
Maria Nerina Cinti, Istituto di Astrofisica Spaziale (Italy)
Enrico Costa, Istituto di Astrofisica Spaziale (Italy)
Philip E. Kaaret, Columbia Univ. (United States)
Paolo Soffitta, Istituto di Astrofisica Spaziale (Italy)
John A. Tomsick, Columbia Univ. (United States)

Published in SPIE Proceedings Vol. 3114:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII
Oswald H. W. Siegmund; Mark A. Gummin, Editor(s)

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