Results 31 to 40 of about 6,477 (211)

A high-efficiency spin-resolved phototemission spectrometer combining time-of-flight spectroscopy with exchange-scattering polarimetry

, 2010
We describe a spin-resolved electron spectrometer capable of uniquely efficient and high energy resolution measurements. Spin analysis is obtained through polarimetry based on low-energy exchange scattering from a ferromagnetic thin-film target.
A. K. Schmid, A. Lanzara, A. V. Fedorov, C. Jozwiak, F. El Gabaly, Feder R., G. Lebedev, J. Graf, N. Andresen, W. Wan, Z. Hussain   +10 more
core   +1 more source

Magnetic Field Structure in Relativistic Jets

EPJ Web of Conferences, 2013
Relativistic jets are ubiquitous when considering an accreting black hole. Two of the most extreme examples of these systems are blazars and gamma-ray bursts (GRBs), the jets of which are thought to be threaded with a magnetic field of unknown structure.
Jermak Helen, Mundell Carole, Steele Iain, Harrison Richard, Kobayashi Shiho, Lindfors Elina, Nilsson Kari, Barres de Almeida Ulisses   +7 more
doaj   +1 more source

Derivation of Instrument Requirements for Polarimetry Using Mg, Fe, and Mn Lines between 250 and 290 nm

The Astrophysical Journal, 2023
Judge et al. recently argued that a region of the solar spectrum in the near-UV between about 250 and 290 nm is optimal for studying magnetism in the solar chromosphere, due to an abundance of Mg ii , Fe ii , and Fe i lines that sample various heights in
A. G. de Wijn, P. G. Judge, R. Ezzeddine, A. Sainz Dalda   +3 more
doaj   +1 more source

High Energy Polarization of Blazars : Detection Prospects

, 2014
Emission from blazar jets in the ultraviolet, optical, and infrared is polarized. If these low-energy photons were inverse-Compton scattered, the upscattered high-energy photons retain a fraction of the polarization.
Chakraborty, Nachiketa, Fields, Brian, Pavlidou, Vasiliki   +2 more
core   +1 more source

Fundamental limitations of the polarization purity of x rays

APL Photonics, 2018
For a few years, x-ray polarimeters have been discussed and even used as a key method for the investigation of fundamental physical questions, from quantum electrodynamics to solid state physics. However, the sensitivity of optical instruments is limited.
K. S. Schulze
doaj   +1 more source

Astronomical Polarimetry with the RIT Polarization Imaging Camera

, 2018
In the last decade, imaging polarimeters based on micropolarizer arrays have been developed for use in terrestrial remote sensing and metrology applications.
Brock, Neal, Ninkov, Zoran, Vorobiev, Dmitry   +2 more
core   +1 more source

Ultrathin Quasi‐2D Perovskite‐Organic Segregated‐Structure Coupling for High‐Performance Narrowband Photomultiplication Detectors

Advanced Science, EarlyView.
Quasi‐2D perovskite‐organic segregated‐structure coupling enables low‐power narrowband photomultiplication photodetectors with 110 nm perovskite layer. The optimal device achieves 1200% EQE and 1.82 × 1011 Jones D* at 3 V, offering a new strategy for miniaturized high‐selectivity optoelectronic sensing.
Hongfei Qu, Peng He, Xingchao Zhao, Yongchao Xie, Fulong Huang, Xiaoling Ma, Byung Hui Lee, Han Young Woo, Yumeng Shi, Zuliang Zhuo, Fujun Zhang, Xixiang Zhu   +11 more
wiley   +1 more source

Training a Dataset Simulated Using RGB Images for an End-to-End Event-Based DoLP Recovery Network

Photonics
Event cameras are bio-inspired neuromorphic sensors that have emerged in recent years, with advantages such as high temporal resolutions, high dynamic ranges, low latency, and low power consumption.
Changda Yan, Xia Wang, Xin Zhang, Conghe Wang, Qiyang Sun, Yifan Zuo   +5 more
doaj   +1 more source

GASP-Galway astronomical Stokes polarimeter

EPJ Web of Conferences, 2010
The Galway Astronomical Stokes Polarimeter (GASP) is an ultra-high-speed, full Stokes, astronomical imaging polarimeter based upon a Division of Amplitude Polarimeter.
Shearer A., Redfern M., Collins P., Sheehan B., Kyne G.   +4 more
doaj   +1 more source

A low-voltage retarding-field Mott polarimeter for photocathode characterization

, 2010
Nuclear physics experiments at Thomas Jefferson National Accelerator Facility's CEBAF rely on high polarization electron beams. We describe a recently commissioned system for prequalifying and studying photocathodes for CEBAF with a load-locked, low ...
A.M. Cook, Al-Khateeb, Anderson, Baylac, Browning, Burnett, Ciccacci, Czyżewski, Dunning, Gay, Gay, Grames, Gray, Hansknecht, Hodge, Huang, J.L. McCarter, K.W. Trantham, Kessler, Leemann, M.L. Stutzman, Maruyama, Maruyama, McClelland, Neufeld, Oro, Pappas, Petrov, Pierce, Qiao, Sinclair, Sinclair, T.G. Anderson, T.J. Gay, Tang, Uhrig   +35 more
core   +1 more source