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Proceedings Paper

Microchannel plate performance and life-test results for the TIMED Solar EUV experiment
Author(s): Virginia Ann Drake; Francis G. Eparvier; William E. McClintock; Thomas N. Woods; Gregory J. Ucker; Chuck Hill
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Paper Abstract

The EUV grating spectrograph (EGS) as part of the Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) solar EUV experiment (SEE) presents a number of performance challenges for its microchannel plate (MCP)- based detector. The EGS measures the solar spectral irradiance from 25 to 200 nm. The intensities of the line and continuum emissions over this spectral range vary by up to five orders of magnitude. While a variety of transmission filters are strategically used to bring the signal over the entire spectrum into the dynamic range of a single chevron pair of MCPs, a number of concerns regarding the characteristic behavior of MCPs remain. The nominal TIMED mission is two years while the extended mission potentially doubles to four years. Over this period, the MCP response is expected to change to some extent. Detailed changes in MCP performance are notoriously application dependent,however. In order to better anticipate and accommodate these changes over the duration of the mission as well as to potentially enhance detector performance, we are performing a series of life-tests on a variety of MCPs. In these tests we characterize MCP gain, pulse height distribution, quantum detection efficiency, and linearity as function of accumulated charge and exposure to atmosphere. Here we report on the result of these test.s

Paper Details

Date Published: 10 November 1998
PDF: 12 pages
Proc. SPIE 3445, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX, (10 November 1998); doi: 10.1117/12.330322
Show Author Affiliations
Virginia Ann Drake, Univ. of Colorado/Boulder (United States)
Francis G. Eparvier, Univ. of Colorado/Boulder (United States)
William E. McClintock, Univ. of Colorado/Boulder (United States)
Thomas N. Woods, Univ. of Colorado/Boulder (United States)
Gregory J. Ucker, Univ. of Colorado/Boulder (United States)
Chuck Hill, Hampton Univ. (United States)

Published in SPIE Proceedings Vol. 3445:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy IX
Oswald H. W. Siegmund; Mark A. Gummin, Editor(s)

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