Share Email Print
cover

Proceedings Paper

Efficient light collection from crystal scintillators using a compound parabolic concentrator coupled to an avalanche photodiode
Author(s): P. A. Jenke; M. S. Briggs; P. N. Bhat; P. Reardon; V. Connaughton; C. Wilson-Hodge
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

In support of improved gamma-ray detectors for astrophysics and observations of Terrestrial Gamma-ray Flashes (TGFs), we have designed a new approach for the collection and detection of optical photons from scintillators such as Sodium Iodide and Lanthanum Bromide using a light concentrator coupled to an Avalanche photodiode (APD). The APD has many advantages over traditional photomultiplier tubes such as their low power consumption, their compact size, their durability, and their very high quantum efficiency. The difficulty in using these devices in gamma-ray astronomy has been coupling their relatively small active area to the large scintillators necessary for gamma-ray science. Our solution is to use an acrylic Compound Parabolic Concentrator (CPC) to match the large output area of the scintillation crystal to the smaller photodiode. These non-imaging light concentrators exceed the light concentration of focused optics and are light and inexpensive to produce. We present our results from the analysis and testing of such a system including gains in light collecting efficiency, energy resolution of nuclear decay lines, as well as our design for a new, fast TGF detector.

Paper Details

Date Published: 26 September 2013
PDF: 6 pages
Proc. SPIE 8861, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VI, 886105 (26 September 2013); doi: 10.1117/12.2024392
Show Author Affiliations
P. A. Jenke, The Univ. of Alabama in Huntsville (United States)
M. S. Briggs, The Univ. of Alabama in Huntsville (United States)
P. N. Bhat, The Univ. of Alabama in Huntsville (United States)
P. Reardon, The Univ. of Alabama in Huntsville (United States)
V. Connaughton, The Univ. of Alabama in Huntsville (United States)
C. Wilson-Hodge, NASA Marshall Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 8861:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy VI
Stephen L. O'Dell; Giovanni Pareschi, Editor(s)

© SPIE. Terms of Use
Back to Top