Zobrazeno 1 - 10
of 199
pro vyhledávání: '"McEntaffer, Randall"'
X-ray diffraction gratings play an essential role in high-resolution spectroscopy of astrophysical phenomena. We present some scientific highlights from the X-ray grating spectrometers (XGS) on board of the Chandra and XMM/Newton missions, XGS optica
Externí odkaz:
http://arxiv.org/abs/2409.02297
Autor:
Barsukova, Maria, Grisé, Fabien, Zhang, Zeyu, Vaidya, Sachin, Guglielmon, Jonathan, Weinstein, Michael I., He, Li, Zhen, Bo, McEntaffer, Randall, Rechtsman, Mikael C.
We experimentally observe photonic Landau levels that arise due to a strain-induced pseudomagnetic field in a silicon photonic crystal slab. The Landau levels are dispersive (i.e., they are not flat bands) due to the distortion of the unit cell by th
Externí odkaz:
http://arxiv.org/abs/2306.04011
Autor:
Kruczek, Nicholas, Miles, Drew M., Fleming, Brian, McEntaffer, Randall, France, Kevin, Grisé, Fabien, McCandliss, Stephan
Modern grating manufacturing techniques suffer from inherent issues that limit their peak efficiencies. The anisotropic etching of silicon facilitates the creation of custom gratings that have sharp and atomically smooth facets, directly addressing t
Externí odkaz:
http://arxiv.org/abs/2207.07659
Autor:
McCoy, Jake A., Schultz, Ted B., Tutt, James H., Rogers, Thomas, Miles, Drew M., McEntaffer, Randall L.
Publikováno v:
Journal of Astronomical Instrumentation | Vol. 05, No. 01, 1640002 (2016) | Special Issue - Solar and Astrophysical Sounding Rockets and Instrumentation; Guest Editors: Steven Christe and Ben Zeiger
Photon counting detector systems on sounding rocket payloads often require interfacing asynchronous outputs with a synchronously clocked telemetry (TM) stream. Though this can be handled with an on-board computer, there are several low cost alternati
Externí odkaz:
http://arxiv.org/abs/2203.11913
Autor:
Carlson, Mackenzie, McCandliss, Stephan, McEntaffer, Randall, Grisé, Fabien, Kruczek, Nicholas, Fleming, Brian
The Far-UV Off Rowland-circle Telescope for Imaging and Spectroscopy (FORTIS) has been successful in maturing technologies for carrying out multi-object spectroscopy in the far-UV, including: the successful implementation of the Next Generation of Mi
Externí odkaz:
http://arxiv.org/abs/2108.09297
We present a new, inexpensive, bench-top method for measuring groove period over large areas with high mapping resolution and high measurement accuracy, dubbed the grating mapper for accurate period (GMAP). The GMAP has the ability to measure large g
Externí odkaz:
http://arxiv.org/abs/2104.11262
Publikováno v:
Journal of Vacuum Science and Technology B: Nanotechnology and Microelectronics, volume 36 (2018), p. 06JA01
Thermally activated selective topography equilibration (TASTE) enables the creation of 3D structures in resist using grayscale electron-beam lithography followed by a thermal treatment to induce a selective polymer reflow. A blazed grating topography
Externí odkaz:
http://arxiv.org/abs/2102.12359
Autor:
Donovan, Benjamin D., McEntaffer, Randall L., Tutt, James H., O'Meara, Bridget C., Grisé, Fabien, Zhang, William W., Biskach, Michael P., Saha, Timo T., Holland, Andrew D., Evan, Daniel, Lewis, Matthew R., Soman, Matthew R., Holland, Karen, Colebrook, David, Cooper, Fraser, Farn, David
The Off-plane Grating Rocket Experiment (OGRE) is a soft X-ray grating spectrometer to be flown on a suborbital rocket. The payload is designed to obtain the highest-resolution soft X-ray spectrum of Capella to date with a resolution goal of $R(\lamb
Externí odkaz:
http://arxiv.org/abs/2101.01749
Autor:
Urban, Martin, Nentvich, Ondrej, Baca, Tomas, Vertat, Ivo, Marsikova, Veronika, Doubravova, Daniela, Daniel, Vladimir, Inneman, Adolf, Pina, Ladisla, McEntaffer, Randall L., Schultz, Ted B., Miles, Drew M., Tutt, James H.
This paper presents Rocket Experiment (REX) that was part of a dual payload rocket campaign for NASA's sounding rocket Black Brant IX with water recovery technology. This mission was a suborbital sounding rocket flight that was launched and recovered
Externí odkaz:
http://arxiv.org/abs/2011.10072
Autor:
Donovan, Benjamin D., McEntaffer, Randall L., DeRoo, Casey T., Tutt, James H., Grisé, Fabien, Eichfel, Chad M., Gall, Oren Z., Burwitz, Vadim, Hartner, Gisela, Pelliciari, Carlo, La Caria, Marlis-Madeleine
The soft X-ray grating spectrometer on board the Off-plane Grating Rocket Experiment (OGRE) hopes to achieve the highest resolution soft X-ray spectrum of an astrophysical object when it is launched via suborbital rocket. Paramount to the success of
Externí odkaz:
http://arxiv.org/abs/2011.01100