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Optical Engineering

Proton radiation testing of digital micromirror devices for space applications
Author(s): Kenneth D. Fourspring; Zoran Ninkov; Bryan C. Fodness; Massimo Robberto; Sally Heap; Alex G. Kim
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Paper Abstract

Scientists are interested in using digital micromirror devices (DMD) as slit-masks in multiobject spectrometers on future space missions. A favored orbit is at the second Lagrangian point (L2). A requirement for mission planning is to determine how long such microelectrical mechanical systems devices would remain operational given the L2 radiation environment, which is primarily composed of solar protons and cosmic rays. To this end, we initiated DMD proton testing. Three DMDs were irradiated with high-energy protons (35 to 50 MeV) at the Lawrence Berkeley National Laboratory 88 in. Cyclotron. Assuming a typical spacecraft shielding of 100 mils of aluminum, our tests imply that DMDs remain fully operable in a five-year mission at L2 with a margin of safety of 4.5.

Paper Details

Date Published: 13 May 2013
PDF: 12 pages
Opt. Eng. 52(9) 091807 doi: 10.1117/1.OE.52.9.091807
Published in: Optical Engineering Volume 52, Issue 9
Show Author Affiliations
Kenneth D. Fourspring, Rochester Institute of Technology (United States)
Zoran Ninkov, Rochester Institute of Technology (United States)
Bryan C. Fodness, Rochester Institute of Technology (United States)
Massimo Robberto, Space Telescope Science Institute (United States)
Sally Heap, NASA Goddard Space Flight Ctr. (United States)
Alex G. Kim, Lawrence Berkeley National Lab. (United States)

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