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Record Details

Record 45 of 1325
Highly curved microchannel plates
Author and Affiliation:
Siegmund, O. H. W.(California Univ., Berkeley, CA, United States)
Cully, S.(California Univ., Berkeley, CA, United States)
Warren, J.(California Univ., Berkeley, CA, United States)
Gaines, G. A.(California, University, Berkeley, United States)
Priedhorsky, W.(California Univ., Berkeley, CA, United States)
Bloch, J.(Los Alamos National Laboratory, NM, United States)
Abstract: Several spherically curved microchannel plate (MCP) stack configurations were studied as part of an ongoing astrophysical detector development program, and as part of the development of the ALEXIS satellite payload. MCP pairs with surface radii of curvature as small as 7 cm, and diameters up to 46 mm have been evaluated. The experiments show that the gain (greater than 1.5 x 10 exp 7) and background characteristics (about 0.5 events/sq cm per sec) of highly curved MCP stacks are in general equivalent to the performance achieved with flat MCP stacks of similar configuration. However, gain variations across the curved MCP's due to variations in the channel length to diameter ratio are observed. The overall pulse height distribution of a highly curved surface MCP stack (greater than 50 percent FWHM) is thus broader than its flat counterpart (less than 30 percent). Preconditioning of curved MCP stacks gives comparable results to flat MCP stacks, but it also decreases the overall gain variations. Flat fields of curved MCP stacks have the same general characteristics as flat MCP stacks.
Publication Date: Jan 01, 1990
Document ID:
19920037636
(Acquired Nov 22, 1995)
Accession Number: 92A20260
Subject Category: INSTRUMENTATION AND PHOTOGRAPHY
Document Type: Conference Paper
Publication Information: (SEE A92-20226)
Publisher Information: United States
Meeting Information: EUV, X-ray and Gamma-Ray Instrumentation for Astronomy; July 11-13, 1990; San Diego, CA; United States
Contract/Grant/Task Num: NGL-05-003-497
Financial Sponsor: NASA; United States
Organization Source: California Univ.; Berkeley, CA, United States
Los Alamos National Lab.; NM, United States
Description: 9p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: FOCAL PLANE DEVICES; IMAGING TECHNIQUES; MICROCHANNEL PLATES; MICROWAVE EQUIPMENT; SPACECRAFT EQUIPMENT; INTEGRATED CIRCUITS; RADIATION DETECTORS; REMOTE SENSING
Imprint And Other Notes: IN: EUV, X-ray, and Gamma-ray instrumentation for astronomy; Proceedings of the Meeting, San Diego, CA, July 11-13, 1990 (A92-20226 06-35). Bellingham, WA, Society of Photo-Optical Instrumentation Engineers, 1990, p. 346-354. Research supported by University of California.
Availability Source: Other Sources
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