Results 141 to 150 of about 762 (173)
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Stellar And Solar X-Ray Polarimetry
Optical Engineering, 1975The theory of Bragg crystal x-ray polarimeters is presented to-gether with an analysis of the statistics of photon-limited polarimeters. The focusing Bragg crystal polarimeter flown on the OSO-8 Satellite is described and a number of results obtained at 2.6 keV and 5.2 keV are presented.
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Micropattern gas detector for X-ray polarimetry
SPIE Proceedings, 2003We report on a new instrument that brings high efficiency to x-ray polarimetry, which is the last unexplored field of x-ray astronomy. It derives the polarization information from the tracks of the photoelectrons imaged by a finely subdivided gas pixel detector.
Bellazzini R +12 more
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Il Nuovo Cimento C, 1993
Stellar X-ray polarimetry has for a long time been indicated as a very powerful diagnostic tool. In spite of this widely recognised interest, positive results are limited to just one: the detection, in the now far 1978, of the polarisation of the X-ray emission from the Crab Nebula. Novel-generation experiments promise a wider and richer amount mess of
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Stellar X-ray polarimetry has for a long time been indicated as a very powerful diagnostic tool. In spite of this widely recognised interest, positive results are limited to just one: the detection, in the now far 1978, of the polarisation of the X-ray emission from the Crab Nebula. Novel-generation experiments promise a wider and richer amount mess of
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2010
Due to the advent of a new generation of detectors, X-ray polarimetry promises to join X-ray imaging, spectroscopy and timing as one of the main observational techniques in high energy astrophysics. This has renewed interest in the field, and indeed several polarimetric missions have recently been proposed.
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Due to the advent of a new generation of detectors, X-ray polarimetry promises to join X-ray imaging, spectroscopy and timing as one of the main observational techniques in high energy astrophysics. This has renewed interest in the field, and indeed several polarimetric missions have recently been proposed.
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X-ray polarimetry with phase plates
Review of Scientific Instruments, 1995Diamond crystals were used as quarter-wave plates (QWPs) and half-wave plates (HWPs) to produce and completely analyze circular and vertical linear polarization of monochromatic x rays from an undulator source (ID10) at the European Synchrotron Radiation Facility.
C. Giles +5 more
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Hard x-ray polarimetry with EXIST
SPIE Proceedings, 2005The Energetic X-ray Survey Telesccope (EXIST) is under study for the propsed Black Hole Finder Probe, one of the three Einstein Probe missions in NASA's proposed Beyond Einstein Program. EXIST would have the capability to survey the full sky at 5-600 keV and enable black holes to be surveyed and studied on all scales.
T. Narita, J. Hong, J. E. Grindlay
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X-ray polarimetry — A novel application of CCDs
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1996Abstract A new method of X-ray polarimetry based on measuring the photoelectron emission direction in a finely segmented MOS CCD has been established using monochromatic synchrotron radiation and planar channeling radiation. For the smallest pixel dimensions (6.8 × 6.8 μm 2 ) available today in commercial optical CCD cameras an analyzing power for ...
Bögner, M. +5 more
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X-Ray Polarimetry (Instrument/Techniques/Calibration)
2019X-ray polarimetry is an “old” field in Astronomy which is rapidly evolving, thanks to the development of sensitive instrumentation and to mission proposals arrived at a various stages of implementation. It was recognised, since the dawn of X-ray Astronomy, as a formidable tool for the comprehension of the emission mechanisms and of the geometry at work
Paolo Soffitta, Enrico Costa
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Astrophysical motivation for X-ray polarimetry
Advances in Space Research, 2004Abstract In this paper I will review the motivation for measuring polarization in the X-ray band from astrophysical sources. Emission models designed to reproduce X-ray spectra can be tested using polarization, and polarization detected in other wavelength bands makes clear predictions as to the X-ray polarization.
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X-Ray Polarimetry with X-Calibur
2014OF THE DISSERTATION . . . . . . . . . . . . . . . . . . . . . xiv 1 The polarization of cosmic X-ray sources . . . . . . . . . . . . . . . 1 1.1 Elementary processes producing polarized X-rays . . . . . . . . . . . 1 1.1.1 Cyclotron emission . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1.2 Synchrotron emission . . . . . . . . . . . . . . . . . .
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