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Highly curved microchannel platesSeveral 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.
Document ID
19920037636
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
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)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: EUV, X-ray and Gamma-Ray Instrumentation for Astronomy
Location: San Diego, CA
Country: United States
Start Date: July 11, 1990
End Date: July 13, 1990
Accession Number
92A20260
Funding Number(s)
CONTRACT_GRANT: NGL-05-003-497
Distribution Limits
Public
Copyright
Other

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