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

Two-Dimensional Position-Sensitive Silicon Detectors For The ACE Solar Isotope Spectrometer


Two-dimensional position-sensitive silicon detectors ('matrix detectors') have been designed, procured, and tested as part of the development of the solar isotope spectrometer (SIS) instrument for NASA's Advanced Composition Explorer (ACE) mission. Important characteristics of these devices include: thickness approximately 50 - 90 micrometer, active area 34 cm^2, 64 strips on each surface with 1 mm strip pitch. The SIS instrument uses four such detectors, processing signals from each of the 512 individual strips with a separate 12-bit pulse height analyzer implemented with custom-designed VLSI circuits. A set of 25 matrix detectors have been characterized through a variety of tests intended both toe select the best candidates for use in the flight instrument and to provide the calibrations needed to interpret flight data. We discuss the design of the SIS matrix detectors and present selected results from the detector tests that have been performed.

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. We wish to acknowledge C. Wilburn, A. Lucas, and the rest of the personnel at Micron Semiconductor for their close cooperation and very significant efforts in developing state-of-the-art position sensitive silicon detectors for SIS. We are grateful to the staffs of the GSI and MSU accelerators, and particularly to D. Schardt and N. Anantaraman·, for their support of the SIS calibrations. We thank D. Aalami, G. Allbritton, B. Gauld, B. Keeman, S. Kleinfelder, M. Madden, H. Marshall, B. Milliken, R. Radocinski, B. Sears, and S. Shuman for their contributions to various aspects of developing and testing the matrix detectors and associated electronics.

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