FROST: a low-noise high-rate photon counting ASIC for X-ray applications

In this work, the spectroscopic performances of new cadmium–zinc–telluride (CZT) pixel detectors recently developed at IMEM-CNR of Parma (Italy) are presented. Sub-millimetre arrays with pixel pitch less than 500 µm, based on boron oxide encapsulated vertical Bridgman grown CZT crystals, were fabricated. Excellent room-temperature performance characterizes the detectors even at high-bias-voltage operation (9000 V cm−1), with energy resolutions (FWHM) of 4% (0.9 keV), 1.7% (1 keV) and 1.3% (1.6 keV) at 22.1, 59.5 and 122.1 keV, respectively. Charge-sharing investigations were performed with both uncollimated and collimated synchrotron X-ray beams with particular attention to the mitigation of the charge losses at the inter-pixel gap region. High-rate measurements demonstrated the absence of high-flux radiation-induced polarization phenomena up to 2 × 106 photons mm−2 s−1. These activities are in the framework of an international collaboration on the development of energy-resolved photon-counting systems for high-flux energy-resolved X-ray imaging.

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Silicon array detector system for high-rate, low-noise X-ray spectroscopy

IEEE Transactions on Nuclear Science ◽

10.1109/23.790698 ◽

1999 ◽

Vol 46 (4) ◽

pp. 886-889 ◽

Cited By ~ 4

Author(s):

B.A. Ludewigt ◽

B. Krieger ◽

D. Lindstrom ◽

M.R. Maier ◽

M. Rutgersson ◽

...

Keyword(s):

Low Noise ◽

Detector System ◽

High Rate ◽

Array Detector ◽

X Ray

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Digital deconvolution of scintillation detector signals for high rate photon-counting x-ray imaging applications

Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XX ◽

10.1117/12.2320425 ◽

2018 ◽

Author(s):

Xiaobing Yue ◽

Zhi Deng

Keyword(s):

Scintillation Detector ◽

Photon Counting ◽

High Rate ◽

X Ray ◽

X Ray Imaging

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High-rate X-ray spectroscopy in mammography with photon counting detectors using a limited number of energy bins

Radiation Measurements ◽

10.1016/j.radmeas.2020.106444 ◽

2020 ◽

Vol 138 ◽

pp. 106444

Author(s):

Bahaa Ghammraoui ◽

Andrey Makeev ◽

Stephen J. Glick

Keyword(s):

Photon Counting ◽

High Rate ◽

X Ray ◽

Photon Counting Detectors

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Investigation of quad-energy high-rate photon counting for X-ray computed tomography using a cadmium telluride detector

Applied Radiation and Isotopes ◽

10.1016/j.apradiso.2017.09.011 ◽

2017 ◽

Vol 130 ◽

pp. 54-59 ◽

Cited By ~ 13

Author(s):

Hiroshi Matsukiyo ◽

Eiichi Sato ◽

Yasuyuki Oda ◽

Satoshi Yamaguchi ◽

Yuichi Sato ◽

...

Keyword(s):

Computed Tomography ◽

Cadmium Telluride ◽

Photon Counting ◽

High Rate ◽

X Ray ◽

X Ray Computed

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GISAXS studies of mesoporous films using a standard laboratory diffractometer

Acta Crystallographica Section A Foundations and Advances ◽

10.1107/s2053273314091165 ◽

2014 ◽

Vol 70 (a1) ◽

pp. C883-C883

Author(s):

Milen Gateshki ◽

Alexander Kharchenko ◽

Patricia Kidd

Keyword(s):

Photon Counting ◽

Grazing Incidence ◽

Low Noise ◽

Mesoporous Films ◽

X Ray ◽

Noise Characteristics ◽

X Ray Scattering ◽

Silica Thin Film ◽

Sample Structure ◽

Set Up

With the increasing number of GISAXS (Grazing-Incidence Small-Angle X-ray Scattering) applications for the investigation of materials surface nano-structures, comes the demand for a mainstream laboratory capability to run alongside the more established synchrotron facilities. GISAXS poses considerable challenges when scaling the method to fit a multipurpose laboratory instrument, including the achievement of good angular resolution at small scattering radius, the reduction of scatter from the direct beam and the observation of low intensity signals. We have developed a hardware solution that addresses these challenges. The recent availability of small size pixel (55 micron) photon counting detectors with very low noise characteristics has enabled the implementation of new 2D imaging GISAXS hardware for a standard 1.8KW laboratory X-ray source. In this work we present a number of results that illustrate the capabilities of the new experimental set-up based on a standard multipurpose diffractometer. We present GISAXS images and analysis of a mesoporous silica thin film with close-packed hexagonal type ordering of the pores. In [1] we have reported reflectometry results and analysis of this sample structure. The addition of GISAXS information demonstrates the versatility of the multipurpose diffractometer and the strength in combining methods on one instrument. Strongly scattering Ti-filled silica mesoporous films illustrate the relative ease with which GISAXS signals can be recorded, including even the weak signal below the critical angle of the sample (fig.1). The scattering patterns from both samples exhibit subtle departures from a simple symmetry, suggesting that the films may exhibit residual strain. Thin films with vertical mesopores provide their own challenges in the observation of scatter close and parallel to the specularly reflected beam. We present results in which scattering from Co-filled mesopore structures with 37nm pitch can be clearly resolved.

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Designing a synchrotron micro-focusing beamline for macromolecular crystallography

Postępy Biochemii ◽

10.18388/pb.2016_44 ◽

2016 ◽

Vol 62 (3) ◽

pp. 395-400

Author(s):

Paweł Grochulski ◽

Mirosław Cygler ◽

Brian Yates

Keyword(s):

Room Temperature ◽

Photon Counting ◽

Low Noise ◽

Macromolecular Crystallography ◽

X Ray Diffraction ◽

X Ray ◽

Photon Counting Detector ◽

Diffraction Patterns ◽

Ultra Low Noise

After a successful 10 years of operation, the Canadian Macromolecular Crystallography Facility 08ID-1 beamline will undergo an upgrade to establish micro-beam capability. This paper is mostly focussed on optics and computer simulations for ray tracing of the beamline. After completion, the focussed beam at the sample will have a much smaller size of 50 Ă 5 Îźm2 (H x V), allowing measurement of X-ray diffraction patterns from much smaller crystals than possible presently. The beamline will be equipped with a fast sample changer and an ultra-low noise photon counting detector, allowing shutter-less operation of the beamline. Additionally, it will be possible to perform in-situ room-temperature experiments.

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