scholarly journals A wide energy range calibration algorithm for X-ray photon counting pixel detectors using high-Z sensor material

2019 ◽  
Vol 925 ◽  
pp. 164-171 ◽  
Author(s):  
P. Zambon ◽  
P. Trueb ◽  
M. Rissi ◽  
C. Broennimann
Keyword(s):  
Energy Range ◽  
Photon Counting ◽  
Wide Energy Range ◽  
X Ray ◽  
Sensor Material ◽  
Pixel Detectors ◽  
Calibration Algorithm ◽  
Wide Energy

Design of an ultrahigh-energy-resolution and wide-energy-range soft X-ray beamline

2013 ◽  
Vol 21 (1) ◽  
pp. 273-279 ◽  
Author(s):  
L. Xue ◽  
R. Reininger ◽  
Y.-Q. Wu ◽  
Y. Zou ◽  
Z.-M. Xu ◽  
...  
Keyword(s):  
Energy Range ◽  
Energy Resolution ◽  
Wide Energy Range ◽  
Ultrahigh Energy ◽  
Exit Slit ◽  
Shanghai Synchrotron Radiation Facility ◽  
X Ray ◽  
Variable Line ◽  
Line Spacing ◽  
Wide Energy

A new ultrahigh-energy-resolution and wide-energy-range soft X-ray beamline has been designed and is under construction at the Shanghai Synchrotron Radiation Facility. The beamline has two branches: one dedicated to angle-resolved photoemission spectroscopy (ARPES) and the other to photoelectron emission microscopy (PEEM). The two branches share the same plane-grating monochromator, which is equipped with four variable-line-spacing gratings and covers the 20–2000 eV energy range. Two elliptically polarized undulators are employed to provide photons with variable polarization, linear in every inclination and circular. The expected energy resolution is approximately 10 meV at 1000 eV with a flux of more than 3 × 1010 photons s−1at the ARPES sample positions. The refocusing of both branches is based on Kirkpatrick–Baez pairs. The expected spot sizes when using a 10 µm exit slit are 15 µm × 5 µm (horizontal × vertical FWHM) at the ARPES station and 10 µm × 5 µm (horizontal × vertical FWHM) at the PEEM station. The use of plane optical elements upstream of the exit slit, a variable-line-spacing grating and a pre-mirror in the monochromator that allows the influence of the thermal deformation to be eliminated are essential for achieving the ultrahigh-energy resolution.

XAFS and X-MCD spectroscopies with undulator gap scan

1998 ◽  
Vol 5 (3) ◽  
pp. 989-991 ◽  
Author(s):  
Andrei Rogalev ◽  
Vincent Gotte ◽  
Jose´ Goulon ◽  
Christophe Gauthier ◽  
Joel Chavanne ◽  
...  
Keyword(s):  
Energy Range ◽  
Absorption Spectroscopy ◽  
Emission Peak ◽  
Photon Statistics ◽  
Wide Energy Range ◽  
X Ray ◽  
Polarization Rate ◽  
Spin Polarized ◽  
Wide Energy ◽  
X Ray Absorption

The first experimental applications of the undulator gap-scan technique in X-ray absorption spectroscopy are reported. The key advantage of this method is that during EXAFS scans the undulator is permanently tuned to the maximum of its emission peak in order to maximize the photon statistics. In X-MCD or spin-polarized EXAFS studies with a helical undulator of the Helios type, the polarization rate can also be kept almost constant over a wide energy range.

Large-Area X-ray Lithography System for LIGA Process Operating in Wide Energy Range of Synchrotron Radiation

2005 ◽  
Vol 44 (7B) ◽  
pp. 5500-5504 ◽  
Author(s):  
Yuichi Utsumi ◽  
Takefumi Kishimoto ◽  
Tadashi Hattori ◽  
Hirotsugu Hara
Keyword(s):  
Synchrotron Radiation ◽  
Energy Range ◽  
Wide Energy Range ◽  
Large Area ◽  
X Ray ◽  
Wide Energy ◽  
Area X ◽  
Lithography System

Detective quantum efficiency for photon-counting hybrid pixel detectors in the tender X-ray domain: application to Medipix3RX

2016 ◽  
Vol 23 (1) ◽  
pp. 206-213 ◽  
Author(s):  
Jean Rinkel ◽  
Debora Magalhães ◽  
Franz Wagner ◽  
Florian Meneau ◽  
Flavio Cesar Vicentin
Keyword(s):  
Energy Range ◽  
Quantum Efficiency ◽  
Imaging Techniques ◽  
Photon Counting ◽  
Absorption Efficiency ◽  
Detective Quantum Efficiency ◽  
Electronic Noise ◽  
X Rays ◽  
X Ray ◽  
Pixel Detectors

Synchrotron-radiation-based X-ray imaging techniques using tender X-rays are facing a growing demand, in particular to probe theKabsorption edges of low-Zelements. Here, a mathematical model has been developed for estimating the detective quantum efficiency (DQE) at zero spatial frequency in the tender X-ray energy range for photon-counting detectors by taking into account the influence of electronic noise. The experiments were carried out with a Medipix3RX ASIC bump-bonded to a 300 µm silicon sensor at the Soft X-ray Spectroscopy beamline (D04A-SXS) of the Brazilian Synchrotron Light Laboratory (LNLS, Campinas, Brazil). The results show that Medipix3RX can be used to develop new imaging modalities in the tender X-ray range for energies down to 2 keV. The efficiency and optimal DQE depend on the energy and flux of the photons. The optimal DQE values were found in the 7.9–8.6 keV photon energy range. The DQE deterioration for higher energies due to the lower absorption efficiency of the sensor and for lower energies due to the electronic noise has been quantified. The DQE for 3 keV photons and 1 × 104 photons pixel−1s−1is similar to that obtained with 19 keV photons. Based on our model, the use of Medipix3RX could be extended down to 2 keV which is crucial for coming applications in imaging techniques at modern synchrotron sources.

scholarly journals X-ray Variability of Blazars

2002 ◽  
Vol 19 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Elena Pian
Keyword(s):  
Energy Range ◽  
High Energy ◽  
Space Missions ◽  
Present Review ◽  
Wide Energy Range ◽  
Spectral Variability ◽  
X Ray ◽  
Energy Emission ◽  
Wide Energy ◽  
High Energy Emission

AbstractCritical progress in our understanding of high energy emission from AGN has been determined in the last 10 years by X-ray monitoring campaigns with many space missions, notably ROSAT, ASCA, RXTE, BeppoSAX, and XMM, often in conjunction with observations at other frequencies. The emphasis of the present review is on recent findings about X-ray variability of blazars. Among AGN, these exhibit the largest amplitude variations of the X-ray emission, often well correlated with variations at higher energies (GeV and TeV radiation). The accurate sampling of the X-ray spectra over more than three decades in energy, made possible by the wide energy range of BeppoSAX, has also shown strong spectral variability in blazar active states, suggesting extreme electron energies and leading to the identification of a class of ‘extreme synchrotron’ sources.

Evolution of stress and microstructure in Ni/C multilayers used as x-ray optics in a wide energy range

2001 ◽  
Author(s):  
Reiner Dietsch ◽  
Thomas Holz ◽  
Danny Weiflbach ◽  
Valeri Melov ◽  
Juergen Schreiber ◽  
...  
Keyword(s):  
Energy Range ◽  
Wide Energy Range ◽  
Ray Optics ◽  
X Ray ◽  
Wide Energy

scholarly journals The X-ray Astronomy Satellite SAX

1990 ◽  
Vol 115 ◽  
pp. 302-306
Author(s):  
R.C. Butler
Keyword(s):  
Energy Range ◽  
Scintillation Counter ◽  
Broad Band ◽  
Wide Energy Range ◽  
Wide Field ◽  
X Ray ◽  
Wide Energy ◽  
Cyclotron Line ◽  
Galactic Sources

AbstractThe SAX satellite is forseen for launch at the end of 1992 to study the X-ray emission from galactic and extra-galactic sources in the energy range 0.1-200 keV. The payload consists of four concentrator/spectrometer systems (3 units 1-10keV, 1 unit 0.1-10keV), a high pressure gas scintillation proportional counter (3-120keV), a phoswich scintillation counter (15-200keV), and two wide field cameras (2-30keV). Together these instruments will perform the following:- - Broad band spectroscopy (E/ΔE=12) in the energy range 0.1-10 keV with imaging resolution of 1 arcmin- Continuum and cyclotron line spectroscopy (E/ΔE=5-20) in the wide energy range 3-200 keV- Variability studies of bright source energy spectra on time scales from milliseconds to days and months- Systematic long term source variability studies in selected regions of the sky down to a source intensity of 1 mCrab.

A newly developed multilayer semiconductor x‐ray detector for the observations of wide energy‐range x rays

1995 ◽  
Vol 66 (2) ◽  
pp. 2311-2313 ◽  
Author(s):  
M. Hirata ◽  
T. Cho ◽  
J. Kohagura ◽  
K. Yatsu ◽  
T. Tamano ◽  
...  
Keyword(s):  
Energy Range ◽  
Wide Energy Range ◽  
X Rays ◽  
X Ray ◽  
Wide Energy
Sign in / Sign up

Export Citation Format

Share Document