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Proceedings Paper

High-Resolution Pulse-Counting Array Detectors for Imaging and Spectroscopy at Ultraviolet Wavelengths
Author(s): J. Gethyn Timothy; Richard L. Bybee
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Paper Abstract

Multi-Anode Microchannel Array (MAMA) detector systems with formats as large as 256 x 1024 pixels are currently under evaluation at ultraviolet wavelengths. Sealed MAMA detector tubes with semi-transparent Cs2Te photocathodes are being used at wavelengths between 1800 and 3000 A, and sealed and open-structure MAMA detector tubes with opaque CsI photocathodes are being used at wavelengths from 1800 A to below 10 A. These detectors provide a high-resolution imaging capability with pixel dimensions of 25 x 25 microns 2 and have the unique capability to determine the arrival time of the detected photon to an accuracy of 100 ns or better. Very large format MAMA detectors with CsI and Cs2Te photocathodes and active areas of 52 x 52 mm2 (2048 x 2048 pixels) have been selected for use as the ultraviolet "solar blind" detectors for the NASA Goddard Space Flight Center's Space Telescope Imaging Spectrograph (STIS). This second-generation instrument will be installed in the Hubble Space Telescope by shuttle astronauts at some time between 1992 and 1995. The MAMA detectors have also been baselined for use in the prime 900 to 1200 A spectrograph on the Lyman far-ultraviolet spectroscopic explorer mission. This paper will review the performance characteristics of the current range of ultraviolet detector systems and will describe the program for the development of the (1024 x 1024) and (2048 x 2048)-pixel imaging detector systems.

Paper Details

Date Published: 10 December 1986
PDF: 8 pages
Proc. SPIE 0687, Ultraviolet Technology, (10 December 1986); doi: 10.1117/12.936549
Show Author Affiliations
J. Gethyn Timothy, Stanford University (United States)
Richard L. Bybee, Ball Aerospace Systems Division (United States)


Published in SPIE Proceedings Vol. 0687:
Ultraviolet Technology
Robert E. Huffman, Editor(s)

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