Results 51 to 60 of about 16,272 (256)

Development of Laterally Graded X‐Ray Multilayer Optics

Advanced Materials Technologies, EarlyView.
This work presents the development of laterally graded X‐ray multilayer optics with both constant and variable lateral gradients. By precisely controlling substrate speed profiles and mask design, these multilayers achieve highly accurate lateral gradients and excellent sagittal thickness uniformity, making them ideal for spectroscopy application at ...
Arindam Majhi, Wadwan Singhapong, Wai Jue Tan, Andrey Sokolov, Stefano Agrestini, Mirian Garcia‐Fernandez, Kejin Zhou, Andrew C. Walters, Chris Bowen, Alexander J.G. Lunt, Hongchang Wang, Kawal J. Sawhney   +11 more
wiley   +1 more source

The HARPS polarimeter

, 2010
We recently commissioned the polarimetric upgrade of the HARPS spectrograph at ESO's 3.6-m telescope at La Silla, Chile. The HARPS polarimeter is capable of full Stokes spectropolarimetry with large sensitivity and accuracy, taking advantage of the large
Dolgopolov, Andrey, Jeffers, Sandra, Johns-Krull, Christopher, Keller, Christoph, Kochukhov, Oleg, Makaganiuk, Vitaly, Piskunov, Nikolai, Rodenhuis, Michiel, Snik, Frans, Stempels, Eric, Valenti, Jeff   +10 more
core   +4 more sources

Design and Implementation of a Novel Polarimetric Active Radar Calibrator for Gaofen-3 SAR

Sensors, 2018
The Chinese first fully polarimetric space-borne synthetic aperture radar (SAR)-Gaofen-3 (GF-3) was launched in August 2016, which operates at the C-band and the resolution can reach 1 m.
Liang Li, Yongtao Zhu, Jun Hong, Feng Ming, Yu Wang   +4 more
doaj   +1 more source

Interferometric imaging with the 32 element Murchison Wide-field Array [PDF]

, 2010
The Murchison Wide-field Array (MWA) is a low frequency radio telescope, currently under construction, intended to search for the spectral signature of the epoch of re-ionisation (EOR) and to probe the structure of the solar corona.
Allen, G., Arcus, W., Benkevitch, L., Bernardi, G., Bowman, J. D., Briggs, F. H., Bunton, J. D., Burns, S., Cappallo, R. J., Clark, M. A., Coles, W. A., Corey, B. E., Derome, M., Deshpande, A., deSouza, L., Doeleman, S. S., Edgar, R. G., Emrich, D., Gleadow, S., Goeke, R., Gopalakrishna, M. R., Greenhill, L. J., Herne, D., Hewitt, J. N., Kamini, P. A., Kaplan, D. L., Kasper, J. C., Kincaid, B. B., Kocz, J., Kowald, E., Kratzenberg, E., Kumar, D., Lonsdale, C. J., Lynch, M. J., Madhavi, S., Matejek, M., McWhirter, S. R., Mitchell, D. A., Morales, M. F., Morgan, E., Oberoi, D., Ord, S. M., Pathikulangara, J., Prabu, T., Rogers, A. E. E., Roshi, A., Salah, J. E., Schinkel, A., Shankar, N. Udaya, Srivani, K. S., Stevens, J., Tingay, S. J., Vaccarella, A., Waterson, M., Wayth, R. B., Webster, R. L., Whitney, A. R., Williams, A., Williams, C.   +58 more
core   +3 more sources

Design and Optimization of Full‐Stokes Hyperspectro‐Polarimetric Encoding Metasurfaces Based on Conditional Multi‐Task Deep Learning

Advanced Science, EarlyView.
A conditional multi‐task deep learning framework is developed for designing and optimizing Full‐Stokes Hyperspectro‐Polarimetric Encoding Metasurfaces (FHPEMs). This framework achieves joint spectro‐polarimetric learning and unified forward–inverse design.
Chenjie Gong, Haodong Shi, Qi Wang, Yingchao Li, Hongyu Sun, Jiayu Wang, Guanlin Li, Jian Zhang, Qiang Fu, Huilin Jiang   +9 more
wiley   +1 more source

Preliminary design of the Visible Spectro-Polarimeter for the Advanced Technology Solar Telescope

, 2012
The Visible Spectro-Polarimeter (ViSP) is one of the first light instruments for the Advanced Technology Solar Telescope (ATST). It is an echelle spectrograph designed to measure three different regions of the solar spectrum in three separate focal ...
Casini, Roberto, de Wijn, Alfred G., Huang, Pei, Nelson, Peter G.   +3 more
core   +1 more source

Synergistic Pyro‐Phototronics and Structural Anisotropy in CsAg2I3/GaN Heterostructures for High‐Performance Polarization‐Sensitive UV Photodetectors

Advanced Science, EarlyView.
The development of polarization‐sensitive ultraviolet photodetectors is limited by poor heterojunction quality and low polarization sensitivity. This study integrates synthesized CsAg2I3 single crystals with intrinsic non‐centrosymmetry into van der Waals heterojunction devices, demonstrating pronounced pyro‐phototronic effect.
Yalin Zhai, Siqi Wang, Peng Guo, Songling Feng, Peng Wan, Jilong Tang, Caixia Kan, Hui Li, Daning Shi, Mingming Jiang   +9 more
wiley   +1 more source

Extracting DEM from airborne X-band data based on PolInSAR [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
Polarimetric Interferometric Synthetic Aperture Radar (PolInSAR) is a new trend of SAR remote sensing technology which combined polarized multichannel information and Interferometric information.
X. X. Hou, G. M. Huang, Z. Zhao
doaj   +1 more source

Photometry and polarimetry of the nucleus of comet 2P/Encke [PDF]

, 2008
Broadband imaging photometry, and broadband and narrowband linear polarimetry was measured for the nucleus of 2P/Encke over the phase-angle range 4 - 28 deg.
Bagnulo, S., Boehnhardt, H., Kolokolova, L., Muinonen, K., Nathues, A., Tozzi, G. P.   +5 more
core   +2 more sources

Faraday–Ramsey Rotation in Ultrathin Alkali Vapor Cells as an Analogy to Atomic‐Beam Systems

Laser &Photonics Reviews, EarlyView.
This work demonstrates that ultrathin rubidium vapor cells can emulate atomic‐beam behavior through geometry‐dependent velocity filtering. Employing a spatially separated pump–probe scheme and Faraday–Ramsey rotation, the study reveals coherent atomic dynamics without buffer gas or anti‐relaxation coatings. This approach offers a compact pathway toward
Mark Dikopoltsev, Eliran Talker, Yefim Barash, Noa Mazurski, Uriel Levy   +4 more
wiley   +1 more source