A compact light shield for the Psyche gamma-ray spectrometer

被引：1
作者：
Hines, Nathan R. [1 ,2 ]
Burks, Morgan T. [1 ]
Kim, Geon-Bo [1 ]
Lawrence, David J. [3 ]
McNeil, Walter J. [2 ]
机构：
[1] Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA
[2] Kansas State Univ, 1200 N MLK Jr Dr, Manhattan, KS 66506 USA
[3] Johns Hopkins Univ, Appl Phys Lab, 11100 Johns Hopkins Rd, Laurel, MD 20723 USA
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2022年 / 1043卷
关键词：
HPGe; Gamma-ray; Spectroscopy; Leakage current; Vacuum; (16) Psyche;
D O I：
10.1016/j.nima.2022.167491
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A compact, low-mass light shield has been designed for the Psyche space mission high-purity germanium gamma-ray spectrometer. The spectrometer will be vented to space, which can allow solar photons to enter the cryostat and cause charge-induced noise. The light shield was designed to block more than 99.9% of solar photons while maintaining high molecular conductance to space vacuum. COMSOL simulations and experiments were performed to characterize light shield photon attenuation and molecular conductance. The light shield was integrated onto the gamma-ray spectrometer and photon suppression and vacuum performance were demonstrated.
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页数：6
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