Modeling and measuring charge sharing in hard x-ray imagers using HEXITEC CdTe detectors

2017 ◽  
Author(s):  
Daniel F. Ryan ◽  
Steven D. Christe ◽  
Albert Y. Shih ◽  
Andrew Inglis ◽  
Wayne H. Baumgartner ◽  
...  
Keyword(s):  
Charge Sharing ◽  
X Ray

Addressing of imperfection of a hybrid pixel sensor for X-ray detection with a circuit for charge sharing cancellation implemented

2018 ◽  
Vol 13 (12) ◽  
pp. C12014-C12014
Author(s):  
A. Krzyżanowska ◽  
G. Deptuch ◽  
P. Maj ◽  
P. Gryboś ◽  
R. Szczygieł
Keyword(s):  
Charge Sharing ◽  
X Ray

scholarly journals Towards hybrid pixel detectors for energy-dispersive or soft X-ray photon science

2016 ◽  
Vol 23 (2) ◽  
pp. 385-394 ◽  
Author(s):  
J. H. Jungmann-Smith ◽  
A. Bergamaschi ◽  
M. Brückner ◽  
S. Cartier ◽  
R. Dinapoli ◽  
...  
Keyword(s):  
Detection System ◽  
Low Noise ◽  
Energy Dispersive ◽  
Development Effort ◽  
Charge Sharing ◽  
X Ray ◽  
Pixel Detectors ◽  
Starting Point ◽  
Synchrotron Light ◽  
Photon Science

JUNGFRAU (adJUstiNg Gain detector FoR the Aramis User station) is a two-dimensional hybrid pixel detector for photon science applications at free-electron lasers and synchrotron light sources. The JUNGFRAU 0.4 prototype presented here is specifically geared towards low-noise performance and hence soft X-ray detection. The design, geometry and readout architecture of JUNGFRAU 0.4 correspond to those of other JUNGFRAU pixel detectors, which are charge-integrating detectors with 75 µm × 75 µm pixels. Main characteristics of JUNGFRAU 0.4 are its fixed gain and r.m.s. noise of as low as 27 e−electronic noise charge (<100 eV) with no active cooling. The 48 × 48 pixels JUNGFRAU 0.4 prototype can be combined with a charge-sharing suppression mask directly placed on the sensor, which keeps photons from hitting the charge-sharing regions of the pixels. The mask consists of a 150 µm tungsten sheet, in which 28 µm-diameter holes are laser-drilled. The mask is aligned with the pixels. The noise and gain characterization, and single-photon detection as low as 1.2 keV are shown. The performance of JUNGFRAU 0.4 without the mask and also in the charge-sharing suppression configuration (with the mask, with a `software mask' or a `cluster finding' algorithm) is tested, compared and evaluated, in particular with respect to the removal of the charge-sharing contribution in the spectra, the detection efficiency and the photon rate capability. Energy-dispersive and imaging experiments with fluorescence X-ray irradiation from an X-ray tube and a synchrotron light source are successfully demonstrated with an r.m.s. energy resolution of 20% (no mask) and 14% (with the mask) at 1.2 keV and of 5% at 13.3 keV. The performance evaluation of the JUNGFRAU 0.4 prototype suggests that this detection system could be the starting point for a future detector development effort for either applications in the soft X-ray energy regime or for an energy-dispersive detection system.

Reducing the MIPs charge-sharing background in X-ray spectroscopic SDD arrays

2021 ◽  
pp. 1-1
Author(s):  
Mihail Antoniu Iliescu ◽  
Marco Miliucci ◽  
Aidin Amirkhani ◽  
Massimiliano Bazzi ◽  
Catalina Curceanu ◽  
...  
Keyword(s):  
Charge Sharing ◽  
X Ray
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