Ryan Allured
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View article: Temporally averaged speckle noise in wavefront sensors for beam projection in weak turbulence
Temporally averaged speckle noise in wavefront sensors for beam projection in weak turbulence Open
Adaptive optics (AO) compensation for imaging or coherent illumination of a remote object relies on accurate sensing of atmospheric aberrations. When a coherent beacon is projected onto the object to enable wavefront sensing, the reflected…
View article: Design and fabrication of prototype piezoelectric adjustable X-ray mirrors
Design and fabrication of prototype piezoelectric adjustable X-ray mirrors Open
Lynx, a next generation X-ray observatory concept currently under study, requires lightweight, high spatial resolution X-ray mirrors. Here we detail the development and fabrication of one of the candidate technologies for Lynx, piezoelectr…
View article: Lynx Mission concept status
Lynx Mission concept status Open
Lynx is a concept under study for prioritization in the 2020 Astrophysics Decadal Survey. Providing orders of magnitude increase in sensitivity over Chandra, Lynx will examine the first black holes and their galaxies, map the large-scale s…
View article: Arcus: exploring the formation and evolution of clusters, galaxies, and stars
Arcus: exploring the formation and evolution of clusters, galaxies, and stars Open
Arcus, a Medium Explorer (MIDEX) mission, was selected by NASA for a Phase A study in August 2017. The observatory provides high-resolution soft X-ray spectroscopy in the 12-50Å bandpass with unprecedented sensitivity: effective areas of >…
View article: Toward large-area sub-arcsecond x-ray telescopes II
Toward large-area sub-arcsecond x-ray telescopes II Open
In order to advance significantly scientific objectives, future x-ray astronomy missions will likely call for x-ray telescopes with large aperture areas (≈3 m[superscript 2]) and fine angular resolution (≈1[superscript 2 ]). Achieving such…
View article: Arcus: the x-ray grating spectrometer explorer
Arcus: the x-ray grating spectrometer explorer Open
Arcus will be proposed to the NASA Explorer program as a free-flying satellite mission that will enable high-resolution soft X-ray spectroscopy (8-50Å) with unprecedented sensitivity - effective areas of > 500 sq cm and spectral resolution…
View article: On the alignment and focusing of the Marshall Grazing Incidence X-ray Spectrometer (MaGIXS)
On the alignment and focusing of the Marshall Grazing Incidence X-ray Spectrometer (MaGIXS) Open
The Marshall Grazing Incidence X-ray Spectrometer (MaGIXS) is a NASA sounding rocket instrument that is designed to observe soft X-ray emissions from 24 - 6.0 Å (0.5 - 2.0 keV energies) in the solar atmosphere. For the first time, high-tem…
View article: Line spread functions of blazed off-plane gratings operated in the Littrow mounting
Line spread functions of blazed off-plane gratings operated in the Littrow mounting Open
Future soft x-ray (10 to 50 Å) spectroscopy missions require higher effective areas and resolutions to perform critical science that cannot be done by instruments on current missions. An x-ray grating spectrometer employing off-plane refle…
View article: Line Spread Functions of Blazed Off-Plane Gratings Operated in the\n Littrow Mounting
Line Spread Functions of Blazed Off-Plane Gratings Operated in the\n Littrow Mounting Open
Future soft X-ray (10 - 50 Angstrom) spectroscopy missions require higher\neffective areas and resolutions to perform critical science that cannot be done\nby instruments on current missions. An X-ray grating spectrometer employing\noff-pl…
View article: Line Spread Functions of Blazed Off-Plane Gratings Operated in the Littrow Mounting
Line Spread Functions of Blazed Off-Plane Gratings Operated in the Littrow Mounting Open
Future soft X-ray (10 - 50 Angstrom) spectroscopy missions require higher effective areas and resolutions to perform critical science that cannot be done by instruments on current missions. An X-ray grating spectrometer employing off-plane…
View article: Performance testing of an off-plane reflection grating and silicon pore optic spectrograph at PANTER
Performance testing of an off-plane reflection grating and silicon pore optic spectrograph at PANTER Open
An x-ray spectrograph consisting of aligned, radially ruled off-plane reflection gratings and silicon pore optics (SPO) was tested at the Max Planck Institute for Extraterrestrial Physics PANTER x-ray test facility. SPO is a test module fo…
View article: X-Ray Surveyor Discussion Session Results From The X-Ray Vision Workshop
X-Ray Surveyor Discussion Session Results From The X-Ray Vision Workshop Open
This paper summarizes the results of a brainstorming session held during the X-ray Vision Workshop (Oct 6-8, 2015, Washington DC). The workshop was convened to discuss the scientific potential of the X-ray Surveyor mission. The X-ray Surve…
View article: Performance Testing of a Novel Off-plane Reflection Grating and Silicon\n Pore Optic Spectrograph at PANTER
Performance Testing of a Novel Off-plane Reflection Grating and Silicon\n Pore Optic Spectrograph at PANTER Open
An X-ray spectrograph consisting of radially ruled off-plane reflection\ngratings and silicon pore optics was tested at the Max Planck Institute for\nextraterrestrial Physics PANTER X-ray test facility. The silicon pore optic\n(SPO) stack …
View article: Performance Testing of a Novel Off-plane Reflection Grating and Silicon Pore Optic Spectrograph at PANTER
Performance Testing of a Novel Off-plane Reflection Grating and Silicon Pore Optic Spectrograph at PANTER Open
An X-ray spectrograph consisting of radially ruled off-plane reflection gratings and silicon pore optics was tested at the Max Planck Institute for extraterrestrial Physics PANTER X-ray test facility. The silicon pore optic (SPO) stack use…