The telescope readout electronics for the gravity probe B satellite

被引：3
|
作者：
Demroff, HP
Babu, S
Bye, MR
Coleman, KL
Das, N
DeBra, DB
Ehrensberger, PD
Farley, RP
Gill, DK
Goebel, JH
Jhabvala, M
Kashani, A
Romero, E
Sullivan, MT
机构：
[1] Lockheed Martin Missiles & Space GP B, Ctr Adv Technol, Palo Alto, CA 94304 USA
[2] Ball Aerosp & Technol Corp, Boulder, CO USA
[3] Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA
[4] Hughes STX, Lanham, MD USA
[5] Stanford Univ, Dept Aeronaut & Astronaut, Stanford, CA 94305 USA
[6] NASA, Ames Res Ctr, Sensors & Instrumentat Branch, Stanford, CA 94305 USA
[7] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
[8] Atlas Sci, Sunnyvale, CA 94086 USA
来源：
JOURNAL DE PHYSIQUE IV | 1998年 / 8卷 / P3期
关键词：
D O I：
10.1051/jp4:1998338
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
dThe pointing and stability requirements for the Gravity Probe B (GP-B) Relativity Mission pose a number of challenges for the star-tracking electronics. Because the telescope-gyroscope assembly operates at 2.8 K, the detector circuit's Si JFETs at the telescope focal plane must be thermally isolated and heated to at least 50 K through self-heating or with the aid of heating resistors. We have designed a low noise, thermally stable photodetector circuit that meets the GP-B requirements as well as fabricated an isolator to give the required thermal isolation and mechanical stability. Test results of the detector - isolator assembly are presented.
引用
收藏
页码：175 / 179
页数：5
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