In-flight performance of the NIRSpec Micro Shutter Array
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In-flight performance of the NIRSpec Micro Shutter Array. / Rawle, Timothy D.; Giardino, Giovanna; Franz, David E.; Rapp, Robert; te Plate, Maurice; Zincke, Christian A.; Abul-Huda, Yasin M.; de Oliveira, Catarina Alves; Bechtold, Katie; Beck, Tracy; Birkmann, Stephan M.; Boker, Torsten; Ehrenwinkler, Ralf; Ferruit, Pierre; Garland, Dennis; Jakobsen, Peter; Karakla, Diane; Karl, Hermann; Keyes, Charles D.; Koehler, Robert; Nimisha, Kumari; Lutzgendorf, Nora; Manjavacas, Elena; Marston, Anthony; Moseley, S. Harvey; Mosner, Peter; Muzerolle, James; Ogle, Patrick; Proffitt, Charles; Sabbi, Elena; Sirianni, Marco; Wahlgren, Glenn; Wislowski, Emily; Wright, Raymond H.; Wu, Chi Rai; Zeidler, Peter.
In: Proceedings of SPIE, Vol. 12180, 121803R, 27.08.2022.Research output: Contribution to journal › Conference article › Research › peer-review
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TY - GEN
T1 - In-flight performance of the NIRSpec Micro Shutter Array
AU - Rawle, Timothy D.
AU - Giardino, Giovanna
AU - Franz, David E.
AU - Rapp, Robert
AU - te Plate, Maurice
AU - Zincke, Christian A.
AU - Abul-Huda, Yasin M.
AU - de Oliveira, Catarina Alves
AU - Bechtold, Katie
AU - Beck, Tracy
AU - Birkmann, Stephan M.
AU - Boker, Torsten
AU - Ehrenwinkler, Ralf
AU - Ferruit, Pierre
AU - Garland, Dennis
AU - Jakobsen, Peter
AU - Karakla, Diane
AU - Karl, Hermann
AU - Keyes, Charles D.
AU - Koehler, Robert
AU - Nimisha, Kumari
AU - Lutzgendorf, Nora
AU - Manjavacas, Elena
AU - Marston, Anthony
AU - Moseley, S. Harvey
AU - Mosner, Peter
AU - Muzerolle, James
AU - Ogle, Patrick
AU - Proffitt, Charles
AU - Sabbi, Elena
AU - Sirianni, Marco
AU - Wahlgren, Glenn
AU - Wislowski, Emily
AU - Wright, Raymond H.
AU - Wu, Chi Rai
AU - Zeidler, Peter
PY - 2022/8/27
Y1 - 2022/8/27
N2 - The NIRSpec instrument on the James Webb Space Telescope (JWST) brings the first multi-object spectrograph (MOS) into space, enabled by a programmable Micro Shutter Array (MSA) of similar to 250,000 individual apertures. During the 6-month Commissioning period, the MSA performed admirably, completing similar to 800 reconfigurations with an average success rate of similar to 96% for commanding shutters open in science-like patterns. We show that 82.5% of the unvignetted shutter population is usable for science, with electrical short masking now the primary cause of inoperable apertures. In response, we propose a plan to recheck existing shorts during nominal operations, which is expected to reduce the number of affected shutters. We also present a full assessment of the Failed Open and Failed Closed shutter populations, which both show a marginal increase in line with predictions from ground testing. We suggest an amendment to the Failed Closed shutter flagging scheme to improve flexibility for MSA configuration planning. Overall, the NIRSpec MSA performed very well during Commissioning, and the MOS mode was declared ready for science operations on schedule.
AB - The NIRSpec instrument on the James Webb Space Telescope (JWST) brings the first multi-object spectrograph (MOS) into space, enabled by a programmable Micro Shutter Array (MSA) of similar to 250,000 individual apertures. During the 6-month Commissioning period, the MSA performed admirably, completing similar to 800 reconfigurations with an average success rate of similar to 96% for commanding shutters open in science-like patterns. We show that 82.5% of the unvignetted shutter population is usable for science, with electrical short masking now the primary cause of inoperable apertures. In response, we propose a plan to recheck existing shorts during nominal operations, which is expected to reduce the number of affected shutters. We also present a full assessment of the Failed Open and Failed Closed shutter populations, which both show a marginal increase in line with predictions from ground testing. We suggest an amendment to the Failed Closed shutter flagging scheme to improve flexibility for MSA configuration planning. Overall, the NIRSpec MSA performed very well during Commissioning, and the MOS mode was declared ready for science operations on schedule.
KW - JWST
KW - NIRSpec
KW - MEMS
KW - Micro Shutters
KW - Multi-object spectroscopy
KW - MOS
KW - Operations
KW - INFRARED SPECTROGRAPH NIRSPEC
U2 - 10.1117/12.2629231
DO - 10.1117/12.2629231
M3 - Conference article
VL - 12180
JO - Progress in Biomedical Optics and Imaging
JF - Progress in Biomedical Optics and Imaging
SN - 1605-7422
M1 - 121803R
T2 - Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave
Y2 - 17 July 2022 through 22 July 2022
ER -
ID: 325371692