High resolution full shell replicated x-ray optics for FOXSI-4

Wayne H. Baumgartner; Stephen Bongiorno; Jeffery Kolodziejczak; Srikanth Singam; Danielle Gurgew; Chet Speegle; David Banks; Patrick Champey; Nicholas Thomas; C. Grant Davis

doi:10.1117/12.2680486

6 October 2023 High resolution full shell replicated x-ray optics for FOXSI-4

Wayne H. Baumgartner, Stephen Bongiorno, Jeffery Kolodziejczak, Srikanth Singam, Danielle Gurgew, Chet Speegle, David Banks, Patrick Champey, Nicholas Thomas, C. Grant Davis

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Proceedings Volume 12679, Optics for EUV, X-Ray, and Gamma-Ray Astronomy XI; 126790C (2023) https://doi.org/10.1117/12.2680486
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

NASA / MSFC has made new full-shell NiCo replicated hard X-ray optics for the fourth flight of the Focusing Optics X-ray Solar Imager sounding rocket set to observe the sun in March 2023. The new FOXSI-4 high resolution optics were made using enhanced mandrel polishing techniques incorporating a Zeeko CNC deterministic polishing machine and an improved module assembly station with in-situ metrology. FOXSI-4 will fly three new 2-meter focal length high resolution mirror modules with two shells each. The previous FOXSI-3 optics achieved an angular resolution of 20 arcsec HPD (5 arcsec FWHM) for ten-shell modules. Initial X-ray measurements of FOXSI-4 shells before module integration show a performance of 8 arcsec HPD and 3 arcsec FWHM, a substantial improvement over the FOXSI-3 optics. We present the advances made in the polishing, replication, and assembly processes, and measurements of the performance of the completed modules taken in the Marshall 100 meter X-ray beam line.

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Wayne H. Baumgartner, Stephen Bongiorno, Jeffery Kolodziejczak, Srikanth Singam, Danielle Gurgew, Chet Speegle, David Banks, Patrick Champey, Nicholas Thomas, and C. Grant Davis "High resolution full shell replicated x-ray optics for FOXSI-4", Proc. SPIE 12679, Optics for EUV, X-Ray, and Gamma-Ray Astronomy XI, 126790C (6 October 2023); https://doi.org/10.1117/12.2680486

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KEYWORDS

X-ray optics

X-rays

Polishing

Metrology

Mirrors

Polishing equipment

Rockets

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