Magnetic Shielding for a Spaceborne Adiabatic Demagnetization Refrigerator (ADR)

Brent A. Warner, Peter J. Shirron, Stephen H. Castles, Aristides T. Serlemitsos
Code 552
NASA/ Goddard Space Flight Center
Greenbelt, MD 20771

The Goddard Space Flight Center has studied magnetic shielding for an adiabatic demagnetization refrigerator. Four types of shielding were studied: active coils, passive ferromagnetic shells, passive superconducting coils, and passive superconducting shells. The passive superconducting shells failed by allowing flux penetration. The other three methods were successful, singly or together.

Experimental studies of passive ferromagnetic shielding are compared with calculations made using the Poisson Group of programs, distributed by the Los Alamos Acceleratory Code Group of the Los Alamos National Laboratory. Agreement between calculation and experiment is good. The ferromagnetic material is a silicon iron alloy.

Advances in Cryogenic Engineering, Vol. 37 Part B, ed. R.W. Fast, pp. 907 - 914 (1992, Plenum Press).

• Return to ADR references
• ADR Page
• Cryogenics & Fluids Home