R Shepherd
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Explore the profile of R Shepherd including associated specialties, affiliations and a list of published articles.
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Articles
174
Citations
1728
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Recent Articles
1.
Magee E, Shepherd R, Beiersdorfer P, Clark J, MacDonald M, Hell N, et al.
Rev Sci Instrum
. 2025 Feb;
96(2).
PMID: 39898805
Short pulse laser (SPL) heated matter has opened an avenue to studying matter at conditions previously unattainable. While SPLs can generate matter at extreme densities and temperatures, characterization of the...
2.
Kraus B, Gao L, Hill K, Bitter M, Efthimion P, Hollinger R, et al.
Rev Sci Instrum
. 2022 Nov;
93(10):103527.
PMID: 36319349
A high-resolution x-ray spectrometer was coupled with an ultrafast x-ray streak camera to produce time-resolved line shape spectra measured from hot, solid-density plasmas. A Bragg crystal was placed near laser-produced...
3.
Beier N, Allison H, Efthimion P, Flippo K, Gao L, Hansen S, et al.
Phys Rev Lett
. 2022 Oct;
129(13):135001.
PMID: 36206410
Short-pulse, laser-solid interactions provide a unique platform for studying complex high-energy-density matter. We present the first demonstration of solid-density, micron-scale keV plasmas uniformly heated by a high-contrast, 400 nm wavelength...
4.
MacDonald M, Liedahl D, Brown G, Aberg D, Cliche D, Foord M, et al.
Rev Sci Instrum
. 2022 Oct;
93(9):093517.
PMID: 36182496
K-shell x-ray emission spectroscopy is a standard tool used to diagnose the plasma conditions created in high-energy-density physics experiments. In the simplest approach, the emissivity-weighted average temperature of the plasma...
5.
Davis N, Donaldson J, Shepherd R, Neisius A, Petrik A, Seitz C, et al.
J Pediatr Urol
. 2022 Feb;
18(2):132-140.
PMID: 35148953
Introduction: Bladder stones (BS) are still endemic in children in developing nations and account for a high volume of paediatric urology workload in these areas. The aim of this systematic...
6.
Hell N, Beiersdorfer P, Brown G, Lockard T, Magee E, Shepherd R, et al.
Rev Sci Instrum
. 2021 Jul;
92(4):043507.
PMID: 34243402
During the past few years, the Orion high-resolution x-ray spectrometers have been successful tools for measuring x-ray spectra from plasmas generated in the Orion laser facility. Duplicate spectrometers also operate...
7.
MacDonald M, Widmann K, Beiersdorfer P, Hell N, Hoarty D, Magee E, et al.
Rev Sci Instrum
. 2021 Mar;
92(2):023509.
PMID: 33648146
We present absolute throughput analysis of several crystals for the Orion High-REsolution X-ray (OHREX) imaging crystal spectrometer using ray tracing and experimental measurements. The OHREX spectrometer is a high-resolution x-ray...
8.
Jiang S, Lazicki A, Hansen S, Sterne P, Grabowski P, Shepherd R, et al.
Phys Rev E
. 2020 Mar;
101(2-1):023204.
PMID: 32168658
We report measurements of K-shell fluorescence lines induced by fast electrons in ramp-compressed Co targets. The fluorescence emission was stimulated by fast electrons generated through short-pulse laser-solid interaction with an...
9.
Hell N, Lockard T, Beiersdorfer P, Magee E, Brown G, Shepherd R, et al.
Rev Sci Instrum
. 2018 Nov;
89(10):10F121.
PMID: 30399853
The Orion high-resolution X-ray (OHREX) imaging spherically bent crystal spectrometer, operated with both image plates and CCD cameras, provides time-averaged plasma diagnostics through high-resolution spectroscopy with good signal-to-noise at the...
10.
Beiersdorfer P, Magee E, Brown G, Hell N, McKelvey A, Shepherd R, et al.
Rev Sci Instrum
. 2018 Nov;
89(10):10F120.
PMID: 30399793
The Orion high-resolution x-ray (OHREX) spectrometer has been a successful tool for measuring the shapes of density-broadened spectral lines produced in short-pulse heated plasmas at the Orion laser facility. We...