Next-Generation MicroShutter Array for HWO UV Multi-Object Spectrograph

We report recent advances in the Next-Generation MicroShutter Array (NGMSA) technology, which enables programmable field selection for the Habitable Worlds Observatory’s Ultraviolet Multi-Object Spectrograph with the capability to simultaneously capture over 256 spectra per quadrant (384 × 768 pixels) across various astronomical targets. By replacing the James Webb Space Telescope’s flying magnetic actuation system with an electrostatic actuation mechanism, NGMSA achieves scalability to formats exceeding 7.2′ × 7.2′ with over one million shutters in 2 × 2 mosaic configurations, while maintaining low mass (approximately 1.5 kg per quadrant) and eliminating mechanical complexity and life-limited components. This technology, baselined for LUVOIR, HabEx, and CETUS Decadal Survey mission concepts, is slated for integration into the HWO’s UV multi-object spectrograph instrument to enable spectroscopic capabilities for targets ranging from cosmological objects to solar system bodies.