3D particle track reconstruction in a single layer cadmium-telluride hybrid active pixel detector

Filipenko, Mykhaylo; Gleixner, Thomas; Anton, G.; Michel, Thilo

doi:10.1140/epjc/s10052-014-3013-1

Cited by 10 publications

(11 citation statements)

References 15 publications

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“…The assembly, its readout (AdvaDAQ [3]) and the per-pixel energy calibration coefficients were provided by ADVA-CAM s.r.o. 2 In contrast to its predecessor Timepix [13], Timepix3 allows the measurement of the time of an interaction (time-of-arrival) and energy deposition (by the timeover-threshold) simultaneously in each individual pixel. It provides a data-driven readout scheme, i.e.…”

Section: Basic Factsmentioning

confidence: 99%

“…3.1, t time−walk can be corrected for. t offset was assumed to be the same constant delay in each pixel (the same assumption was made in [2]). Since the reconstruction method is based on measuring the time differences within the set of pixels forming a track, this offset is canceled out and does not play a role for the z-reconstruction.…”

Section: Reconstruction Principlesmentioning

confidence: 99%

“…The z-coordinate was determined by the entry and exit points, whereby the track broadening due to charge sharing gave further information about track orientation [1]. Later, Filipenko et al [2] have shown that Timepix can be used similarly to a Time Projection Chamber (TPC) for a 3D track reconstruction. Using a 1 mm thick CdTe at very low reverse bias of − 80 V, they achieved a z-resolution of 60 µm a e-mail: benedikt.bergmann@utef.cvut.cz (while the resolution in x and y was given by the pixel pitch of 110 µm).…”

Section: Introductionmentioning

confidence: 99%

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3D reconstruction of particle tracks in a 2 mm thick CdTe hybrid pixel detector

et al. 2019

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We demonstrate how the latest generation of hybrid pixel detectors of the Timepix family can be used to reconstruct 3 dimensional particle tracks on a microscopic scale, additionally determining the stopping power along the particles' paths. In an experiment, a Timepix3 detector with a 2 mm thick planar CdTe sensor was irradiated in a 40 GeV/c pion beam and used in a similar way to a time-projection chamber: The coordinates x and y were given by the trajectory projection (pixel pitch: 55 µm), the z-coordinate was reconstructed from the charge carrier drift time measurement (time binning: 1.5625 ns). The achievable z-resolution was studied at different bias voltages. Systematic inaccuracies due to an imprecise drift time model were determined and separated from the intrinsic uncertainty given by the time resolution. It was shown that a z-resolution of 60 µm could be achieved by a perfect modeling of the drift time. With the presented z-reconstruction methodology, we studied the charge collection efficiency as a function of interaction depth, which was then used to apply a charge loss correction to the per-pixel energy measurements. 3D event displays of pion, muon and electron tracks are shown.

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Section: Basic Factsmentioning

confidence: 99%

Section: Reconstruction Principlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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3D reconstruction of particle tracks in a 2 mm thick CdTe hybrid pixel detector

et al. 2019

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“…Filipenko et al [10] presented a method for a 3D track reconstruction and achieved a z-resolution of 60 µm utilizing a Timepix chip attached to a 1 mm thick CdTe sensor. However, due to the limited time resolution of the Timepix chip, they had to use the sensor at very low bias, thus losing charge due to recombination.…”

Section: Introductionmentioning

confidence: 99%

3D track reconstruction capability of a silicon hybrid active pixel detector

et al. 2017

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Timepix3 detectors are the latest generation of hybrid active pixel detectors of the Medipix/Timepix family. Such detectors consist of an active sensor layer which is connected to the readout ASIC (application specific integrated circuit), segmenting the detector into a square matrix of 256 × 256 pixels (pixel pitch 55 µm). Particles interacting in the active sensor material create charge carriers, which drift towards the pixelated electrode, where they are collected. In each pixel, the time of the interaction (time resolution 1.56 ns) and the amount of created charge carriers are measured. Such a device was employed in an experiment in a 120 GeV/c pion beam. It is demonstrated, how the drift time information can be used for "4D" particle tracking, with the three spatial dimensions and the energy losses along the particle trajectory (dE/dx). Since the coordinates in the detector plane are given by the pixelation (x,y), the x-and y-resolution is determined by the pixel pitch (55 µm). A z-resolution of 50.4 µm could be achieved (for a 500 µm thick silicon sensor at 130 V bias), whereby the drift time model independent z-resolution was found to be 28.5 µm.

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“…This paper also discussed how the values of D, R, T and c affect the discrimination efficiency and proposed a possibility to discriminate single-electron and 0νββ events of different energies. Although due to current technical limitations conducting a practical experiment is difficult for the moment, recent progress on hybrid pixel detector technologies and reconstruction methods [16][22] [23]makes it promising to propose an experiment in the very near future, especially with Timepix3 when it is commercially available.…”

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confidence: 99%

3-D topological signatures and a new discrimination method for single-electron events and 0 νββ events in CdZnTe: A Monte Carlo simulation study

Zeng

Cang

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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In neutrinoless double beta (0νββ) decay experiments, the diversity of topological signatures of different particles provides an important tool to distinguish double beta events from background events and reduce background rates. Aiming at suppressing the single-electron backgrounds which are most challenging, several groups have established Monte Carlo simulation packages to study the topological characteristics of single-electron events and 0νββ events and develop methods to differentiate them. In this paper, applying the knowledge of graph theory, a new topological signature called REF track (Refined Energy-Filtered track) is proposed and proven to be an accurate approximation of the real particle trajectory. Based on the analysis of the energy depositions along the REF track of single-electron events and 0νββ events, the REF energy deposition models for both events are proposed to indicate the significant differences between them. With these differences, this paper presents a new discrimination method, which, in the Monte Carlo simulation, achieved a single-electron rejection factor of 93.8 ± 0.3 (stat.)% as well as a 0νββ efficiency of 85.6 ± 0.4 (stat.)% with optimized parameters in CdZnTe.

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3D particle track reconstruction in a single layer cadmium-telluride hybrid active pixel detector

Cited by 10 publications

References 15 publications

3D reconstruction of particle tracks in a 2 mm thick CdTe hybrid pixel detector

3D reconstruction of particle tracks in a 2 mm thick CdTe hybrid pixel detector

3D track reconstruction capability of a silicon hybrid active pixel detector

3-D topological signatures and a new discrimination method for single-electron events and 0 νββ events in CdZnTe: A Monte Carlo simulation study

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