15 March 2016 The effects of heavy ion radiation on digital micromirror device performance
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There is a need for a space-suitable solution to the selection of targets to be observed in astronomical multiobject spectrometers (MOS). A few digital micromirror device (DMD) - based prototype MOS have been developed for use at ground observatories, However their main use will come in deploying a space based mission. The question of DMD performance under in-orbit radiation remains unanswered. DMDs were tested under accelerated heavy-ion radiation (with the control electronics shielded from radiation), with a focus on detection of single-event effects (SEEs) including latch-up events. Testing showed that DMDs are sensitive to non-destructive ion-induced state changes; however, all SEEs were cleared with a soft reset (that is, sending a new pattern to the device). The DMDs did not experience single-event induced permanent damage or functional changes that required a hard reset (power cycle), even at high ion fluences. This suggests that the SSE rate burden will be manageable for a DMD-based instrument when exposed to solar particle fluxes and cosmic rays on orbit.
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Anton Travinsky, Anton Travinsky, Dmitry Vorobiev, Dmitry Vorobiev, Alan D. Raisanen, Alan D. Raisanen, Jonathan Pellish, Jonathan Pellish, Zoran Ninkov, Zoran Ninkov, Massimo Robberto, Massimo Robberto, Sara Heap, Sara Heap, "The effects of heavy ion radiation on digital micromirror device performance", Proc. SPIE 9761, Emerging Digital Micromirror Device Based Systems and Applications VIII, 976108 (15 March 2016); doi: 10.1117/12.2213634; https://doi.org/10.1117/12.2213634


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