Microchannel plate performance and life-test results for the TIMED solar EUV experiment

被引：3

作者：

Drake, VA ^{[1
]}

Eparvier, FG ^{[1
]}

McClintock, WE ^{[1
]}

Woods, TN ^{[1
]}

Ucker, G ^{[1
]}

Hill, C ^{[1
]}

机构：

[1] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA

来源：

EUV, X-RAY, AND GAMMA-RAY INSTRUMENTATION FOR ASTRONOMY IX | 1998年 / 3445卷

关键词：

D O I：

10.1117/12.330322

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Extreme UltraViolet (EUV) Grating Spectrograph (EGS) as part of the Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) Solar EW Experiment (SEE) presents a number of performance challenges for it's 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 results of these tests.

引用

页码：603 / 614

页数：12