J. Phys. IV France 08 (1998) Pr3-181-Pr3-184
Testing the GP-B telescope readout electronics on a flight quality telescopeS. Wang1, D.-H. Gwo1, K.A. Bower1, L.W. Huff1, R.K. Kirschman1, 2, J.A. Lipa1, M. Jhabvala3, S. Babu4 and N. Das5
1 Hansen Experimental Physics Laboratory, Stanford University, Stanford, California, U.S.A.
2 Consulting Physicist, Mountain View, California, U.S.A.
3 NASA Goddard Space Flight Center, Greenbelt, Maryland, U.S.A.
4 Ball Aerospace and Technologies Corp., Boulder, Colorado, U.S.A.
5 Hughes/STX, Lanham, Maryland, U.S.A.
Integrated photodiodes and silicon JFET preamps are used for the optical readout of the Gravity Probe B cryogenic star tracking telescope. The heated circuit assembly is mounted on a thermal isolator so that it can be heated to around 80 K while the telescope remains at its operating temperature of 2.8 K. We present test results of the readout with a flight quality telescope.
© EDP Sciences 1998