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Published October 18, 1996 | Published
Book Section - Chapter Open

Characterization Of Large-Area Silicon Ionization Detectors For The ACE Mission


We report on extensive tests of large-area (10 cm diameter) high-purity ion-implanted silicon detectors for the solar isotope spectrometer (SIS), and lithium-drifted silicon detectors for the cosmic ray isotope spectrometer (CRIS), which are under development for launch on the advanced composition explorer (ACE) mission. Depletion and breakdown characteristics versus bias were studied, as were long-term current and noise stability in a thermally cycled vacuum. Dead-layer and total thickness maps were obtained using laser interferometry, beams of energetic argon nuclei and radioactive sources of alpha particles. Results, selection criteria, and yields are presented.

Additional Information

SPIE © 1996. This research was supported by the National Aeronautics and Space Administration at the California Institute of Technology (under contract NAS5-32626 and grant NAGW-1919), the Jet Propulsion Laboratory, and the Goddard Space Flight Center. BLD is grateful for support from the National Research Council. The Si(Li) detectors were fabricated at the Lawrence Berkeley National Laboratory, and the high-purity detectors were purchased from Micron Semiconductor, Ltd. of Sussex in the United Kingdom. Special thanks go to J. Walton, Y. Wong; C. Wilburn and A. Lucas for making the$e detectors. We thank G. Allbritton, M. Madden and B. Nahory for contributions in testing detectors and in taking data at MSU, as well as the personnel at the NSCL for their support. We also thank B. Sears for aid in analyzing this data.

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