High-contrast X-ray micro-tomography of low attenuation samples using large area hybrid semiconductor pixel detector array of 10 × 5 Timepix chips

Abstract Timepix4 is a 24.7 × 30.0 mm2 hybrid pixel detector readout ASIC which has been designed to permit detector tiling on 4 sides. It consists of 448 × 512 pixels which can be bump bonded to a sensor with square pixels at a pitch of 55 µm. Like its predecessor, Timepix3, it can operate in data driven mode sending out information (Time of Arrival, ToA and Time over Threshold, ToT) only when a pixel has a hit above a pre-defined and programmable threshold. In this mode hits can be tagged to a time bin of <200 ps and Timepix4 can record hits correctly at incoming rates of ∼3.6 MHz/mm2/s. In photon counting (or frame-based) mode it can count incoming hits at rates of up to 5 GHz/mm2/s. In both modes data is output via between 2 and 16 serializers each running at a programmable data bandwidth of between 40 Mbps and 10 Gbps. The specifications, architecture and circuit implementation are described along with first electrical measurements and measurements with radioactive sources. In photon counting mode X-ray images have been taken at a threshold of 650 e− (with <10 masked pixels). In data driven mode images were taken of ToA/ToT data using a 90Sr source at a threshold of 800 e− (with ∼120 masked pixels).

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Fabrication of a direct-type silicon pixel detector for a large area hybrid x-ray imaging device

2007 IEEE Nuclear Science Symposium Conference Record ◽

10.1109/nssmic.2007.4436870 ◽

2007 ◽

Author(s):

Kun-Sik Park ◽

Tae-Woo Kim ◽

Yong-Sun Yoon ◽

Jong-Moon Park ◽

Jin-Yeong Kang ◽

...

Keyword(s):

Pixel Detector ◽

Large Area ◽

Imaging Device ◽

X Ray ◽

Type Silicon ◽

X Ray Imaging ◽

Silicon Pixel Detector

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Towards Imaging with Polycrystalline Mercuric Iodide Semiconductor Detectors

MRS Proceedings ◽

10.1557/proc-487-329 ◽

1997 ◽

Vol 487 ◽

Cited By ~ 9

Author(s):

M. Schieber ◽

A. Zuck ◽

M. Braiman ◽

L. Melekhov ◽

J. Nissenbaum ◽

...

Keyword(s):

Vapor Deposition ◽

Screen Printing ◽

Radiation Detector ◽

Nuclear Radiation ◽

Semiconductor Detectors ◽

Pixel Detector ◽

Mercuric Iodide ◽

X Ray Diffraction ◽

Large Area ◽

X Ray

AbstractPreparation of polycrystalline mercuric iodide very thin (1 μm) films using laser ablation and thick films (100–600μm), using hot pressing, hot wall vapor deposition and screen printing methods, fabricated as radiation detector plates are briefly described. X-ray diffraction, photoluminescence and optical microscopic measurements as well as response to nuclear radiation will be given. Finally, recent results obtained with a large area imaging pixel detector will be shown.

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The ePix10k 2-megapixel hard X-ray detector at LCLS

Journal of Synchrotron Radiation ◽

10.1107/s1600577520004257 ◽

2020 ◽

Vol 27 (3) ◽

pp. 608-615 ◽

Cited By ~ 2

Author(s):

Tim Brandt van Driel ◽

Silke Nelson ◽

Rebecca Armenta ◽

Gabriel Blaj ◽

Stephen Boo ◽

...

Keyword(s):

Repetition Rate ◽

Dynamic Range ◽

Single Photon ◽

High Dynamic Range ◽

Pixel Detector ◽

Large Area ◽

Experimental Conditions ◽

X Ray ◽

Area Detector ◽

High Dynamic

The ePix10ka2M (ePix10k) is a new large area detector specifically developed for X-ray free-electron laser (XFEL) applications. The hybrid pixel detector was developed at SLAC to provide a hard X-ray area detector with a high dynamic range, running at the 120 Hz repetition rate of the Linac Coherent Light Source (LCLS). The ePix10k consists of 16 modules, each with 352 × 384 pixels of 100 µm × 100 µm distributed on four ASICs, resulting in a 2.16 megapixel detector, with a 16.5 cm × 16.5 cm active area and ∼80% coverage. The high dynamic range is achieved with three distinct gain settings (low, medium, high) as well as two auto-ranging modes (high-to-low and medium-to-low). Here the three fixed gain modes are evaluated. The resulting dynamic range (from single photon counting to 10000 photons pixel−1 pulse−1 at 8 keV) makes it suitable for a large number of different XFEL experiments. The ePix10k replaces the large CSPAD in operation since 2011. The dimensions of the two detectors are similar, making the upgrade from CSPAD to ePix10k straightforward for most setups, with the ePix10k improving on experimental performance. The SLAC-developed ePix cameras all utilize a similar platform, are tailored to target different experimental conditions and are designed to provide an upgrade path for future high-repetition-rate XFELs. Here the first measurements on this new ePix10k detector are presented and the performance under typical XFEL conditions evaluated during an LCLS X-ray diffuse scattering experiment measuring the 9.5 keV X-ray photons scattered from a thin liquid jet.

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