Abstract
A version of the High Energy Astronomical Observatory (HEAO) magnetic spectrometer which is updated for the space shuttle sortie mode is described. A stripped-down experiment is considered with a magnetic spectrometer alone, even though any real space shuttle magnetic spectrometer experiment would almost certainly include other detectors. Problems relating specifically to superconducting magnetic spectrometers are studied. In particular, almost all of the support provided for this contract was spent in investigating new cryostat parameters appropriate to the shuttle weight and duration constraints. It was found that the size and weight of the cryostat, for a two-month lifetime, can be substantially reduced from that contemplated for HEAO. Moreover, with the reduced documentation requirements contemplated for the space shuttle, a considerable cost savings relative to HEAO can be realized. Since a superconducting magnetic spectrometer has considerable magnetic fringe field, methods for shielding sensitive electronic and mechanical components of other experiments, or the space shuttle itself, from the effects of the field, are considered. Experiments placed further away than the immediately neighboring pallet will see a magnetic field only slightly greater than the Earth's. Since even the neighboring pallet's components see a field of less than 100 gauss, magnetic shielding can be accomplishedmore » for practically all sensitive locations by passive, high-permeability shields. (WHK)« less
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