Grating design for the Water Recovery X-ray Rocket

Miles, Drew M.; McEntaffer, Randall L.; Donovan, Benjamin D.; Tutt, James H.; Steiner, Tyler; Hillman, Christopher; McCoy, Jake; Zhang, Ningxiao

doi:10.1117/12.2312648

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The fabrication of the master grating followed the processes in Ref. 29, and the grating replicas were produced using substrate-conformal imprint lithography (SCIL) at SCIL Nanoimprint Solutions. 30 The detailed design of the WRXR gratings and mirrors is presented in Ref.…”

Section: Optical Componentsmentioning

confidence: 99%

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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: Optical Componentsmentioning

confidence: 99%

“…The ALS experimental setup, data collection, and analysis followed the procedures discussed in Ref. 29. Figure 6 shows the absolute total and single-order diffraction efficiency from one of the gratings tested at the ALS.…”

Section: Component-level Measurementsmentioning

confidence: 99%

Water Recovery X-Ray Rocket grating spectrometer

Miles

Hull

Schultz

et al. 2019

J. Astron. Telesc. Instrum. Syst.

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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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The Rockets for Extended-source X-ray Spectroscopy Instrument Design

Miles,

McEntaffer,

Tutt

et al. 2024

ApJ

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The Rockets for Extended-source X-ray Spectroscopy (tREXS) are a series of suborbital rocket payloads designed to collect spectral emission from extended astronomical sources of soft X-rays. The tREXS spectrograph uses mechanical beam-shaping modules and reflection gratings to passively focus and then disperse incident X-rays to an array of Teledyne/e2v CIS 113 CMOS X-ray sensors. Designed to achieve a moderate spectral resolution, R ⪆ 50, from ≈15 to 40 Å over a large field of view (>10 deg2), the tREXS instrument is sensitive to line emission from key ion species over the soft-X-ray band. Here we present the complete end-to-end design of the tREXS spectrograph and discuss its significance and expected performance, using simulated observations of the Cygnus Loop supernova remnant and an enhanced region in the soft X-ray background.

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Grating design for the Water Recovery X-ray Rocket

Cited by 3 publications

References 7 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

The Rockets for Extended-source X-ray Spectroscopy Instrument Design

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