Optical design of the Off-plane Grating Rocket Experiment

Donovan, Benjamin D.; McEntaffer, Randall L.; Tutt, James H.; Schultz, Ted; Biskach, Michael P.; Chan, Kai Wing; Hlinka, Michal; Kearney, John D.; Mazzarella, James R.; McClelland, Ryan S.; Riveros, Raul E.; Saha, Timo T.; Zhang, William W.; Holland, Andrew D.; Lewis, Morgan; Soman, Matthew R.; Holland, Karen; Murray, Neil J.

doi:10.1117/12.2312219

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…The WRXR was a technology-driven astrophysics payload that sought to demonstrate the performance of two technologies assigned the highest priority to NASA Astrophysics technology development in the 2019 Astrophysics Biennial Technology Report: 1 x-ray reflection gratings and an x-ray hybrid CMOS detector (HCD). Both technologies were studied or are actively under development for the Lynx flagship mission concept, [2][3][4] explorer and probe mission concepts, [5][6][7][8] and smaller missions, such as suborbital rocket payloads 9,10 and cubesats. 11 The WRXR, along with the Colorado Highresolution Echelle Stellar Spectrograph, 12 also enabled the first successful demonstrations of NASA water recovery technology for astrophysics suborbital rocket payloads.…”

Section: Introductionmentioning

confidence: 99%

Water Recovery X-Ray Rocket grating spectrometer

Miles

Hull

Schultz

et al. 2019

J. Astron. Telesc. Instrum. Syst.

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The Water Recovery X-Ray Rocket (WRXR) was a suborbital rocket payload that was launched and recovered in April 2018. The WRXR flew two technologies being developed for future large x-ray missions: x-ray reflection gratings and a hybrid CMOS detector (HCD). The large-format replicated gratings on the WRXR were measured in ground calibrations to have absolute single-order diffraction efficiency of ∼60%, ∼50%, and ∼35% at CVI, OVII, and OVIII emission energies, respectively. The HCD was operated with ∼6 e − read noise and ∼88 eV energy resolution at 0.5 keV. The WRXR was also part of a two-payload campaign that successfully demonstrated NASA sounding rocket water recovery technology for science payloads. The primary instrument, a soft x-ray grating spectrometer, targeted diffuse emission from the Vela supernova remnant over a field-of-view >10 deg 2 . The flight data show that the detector was operational during flight and detected x-ray events from an on-board calibration source, but there was no definitive detection of x-ray events from Vela. Flight results are presented along with a discussion of factors that could have contributed to the null detection.

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Section: Introductionmentioning

confidence: 99%

Water Recovery X-Ray Rocket grating spectrometer

Miles

Hull

Schultz

et al. 2019

J. Astron. Telesc. Instrum. Syst.

Self Cite

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Fabrication and Diffraction Efficiency of a Large-format, Replicated X-Ray Reflection Grating

Miles

McCoy

McEntaffer

et al. 2018

ApJ

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We present the methodology used to fabricate an X-ray reflection grating and describe a technique for grating replication. Further, we present the experimental procedure and results of a study to measure the diffraction efficiency of a replicated X-ray reflection grating in an extreme off-plane geometry. The blazed grating demonstrates a total diffraction efficiency of ∼60% from 0.34 to 1.2 keV at a grazing angle of ∼1.°5, with single-order efficiency ranging from ∼35% to 65% for energies within the blaze envelope. The diffraction efficiency of the grating measured relative to the reflectivity of the metal coating averages ∼90% above 0.34 keV. Data collected as a function of beam position on the grating indicate a relative variation in total efficiency of <1% rms across the grating surface.

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Optical design of the Off-plane Grating Rocket Experiment

Cited by 2 publications

References 17 publications

Water Recovery X-Ray Rocket grating spectrometer

Water Recovery X-Ray Rocket grating spectrometer

Fabrication and Diffraction Efficiency of a Large-format, Replicated X-Ray Reflection Grating

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