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Proceedings Paper

Measurements of the quantum efficiency and depletion depth in gallium-arsenide detectors
Author(s): Christian Erd; Alan Owens; G. Brammertz; David H. Lumb; Marcos Bavdaz; Anthony J. Peacock; Seppo Arvo Anter Nenonen; Hans Andersson
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Paper Abstract

Measurements of quantum efficiencies are presented for three epitaxial gallium arsenide detectors with nominal depletion depths of 40, 325, and 400 μm. Attempts to measure the depletion as a function of bias indicated that the apparent depletion depth was much less than the intrinsic layer thickness. Expectation that the of the detection efficiency could be increased using a larger intrinsic layer could not be met. The largest value of a depletion depth measured by X-rays was determined at about 100 μm for the 400 μm device.

Paper Details

Date Published: 10 January 2003
PDF: 8 pages
Proc. SPIE 4784, X-Ray and Gamma-Ray Detectors and Applications IV, (10 January 2003); doi: 10.1117/12.451168
Show Author Affiliations
Christian Erd, European Space Agency/ESTEC (Netherlands)
Alan Owens, European Space Agency/ESTEC (Netherlands)
G. Brammertz, European Space Agency/ESTEC (Netherlands)
David H. Lumb, European Space Agency/ESTEC (Netherlands)
Marcos Bavdaz, European Space Agency/ESTEC (Netherlands)
Anthony J. Peacock, European Space Agency/ESTEC (Netherlands)
Seppo Arvo Anter Nenonen, Metorex International Oy (Finland)
Hans Andersson, Metorex International Oy (Finland)


Published in SPIE Proceedings Vol. 4784:
X-Ray and Gamma-Ray Detectors and Applications IV
Ralph B. James; Larry A. Franks; Arnold Burger; Edwin M. Westbrook; Roger D. Durst; Edwin M. Westbrook; Roger D. Durst, Editor(s)

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