Selective detection of secondary particles and neutrons produced in ion beam therapy with 3D sensitive voxel detector

Jakůbek, J.; Granja, Carlos; Hartmann, B.; Jaekel, O.; Martišíková, M.; Opalka, L.; Pospı́šil, S.

doi:10.1088/1748-0221/6/12/c12010

Cited by 19 publications

(12 citation statements)

References 6 publications

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“…The description of this method, as well as the operating features of detectors with a polyethylene converter can be found in [7,17]. Polyethylene with density of 0.80 g/cm 3 was used as a converter and the recoil protons were detected with the surface-barrier GaAs sensor. Polyethylene films with a thickness of 80 µm were used to stack the required converter thickness.…”

Section: Fast Neutronsmentioning

confidence: 99%

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Fast neutron detector based on surface-barrier VPE GaAs structures

Черных

Didenko

et al. 2015

J. Inst.

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Surface-barrier structures based on thin high-purity GaAs epilayers with a polyethylene converter were studied as fast neutron detectors. A continuous Schottky barrier with a large area of 5 × 5 mm 2 to the high-purity GaAs epilayers was fabricated using a Pt/TiN/Au metallization system. Results of measurement of electric parameters and α-particle spectra are presented. The fast neutron spectra from the 241 Am-Be source measured by the recoil proton method for various thicknesses of the polyethylene converter and various operating biases are shown as well. The proposed detectors have shown high neutron detection efficiency of 1.30 • 10 −3 puls./neutr. and an acceptable signal-to-background ratio (at level of 50) as well as the capability to operate efficiently without any external bias.

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Section: Fast Neutronsmentioning

confidence: 99%

“…Nowadays semiconductor based neutron detectors are widely adopted [1][2][3][4][5][6]. The operating principle of such detectors is based on the detection of secondary particles produced by (n, α)-, (n, γ)or (n, p)-reactions using a semiconductor sensor.…”

Section: Introductionmentioning

confidence: 99%

Fast neutron detector based on surface-barrier VPE GaAs structures

Черных

Didenko

et al. 2015

J. Inst.

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“…They can be used in places where the available space is limited, and in situations where weight or power consumption matters. Such applications include space weather analyses [7], the determination of trapped particle directions in the Van-Allen radiation belts [8,9], monitoring of secondary radiation in hadron therapy [10], the study of the antiproton annihilation [4] and electron microscopy [11]. Especially, when equipped with CdTe or CdZnTe as sensor material Timepix detectors can be investigated for double beta decay experiments [12].…”

Section: Introductionmentioning

confidence: 99%

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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“…Detectors of the Timepix [2] technology have been employed in various applications, which include life science (imaging, hadron therapy, ...) [3,4], the measurement of angular correlation functions [5], space weather analyses [6], the determia e-mail: benedikt.bergmann@utef.cvut.cz nation of trapped particle directions in the radiation belts [7], or the study of the antiproton annihilation [8]. In particular Timepix detectors with a CdTe or CdZnTe sensor layer have been considered for double beta decay experiments [9].…”

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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Selective detection of secondary particles and neutrons produced in ion beam therapy with 3D sensitive voxel detector

Cited by 19 publications

References 6 publications

Fast neutron detector based on surface-barrier VPE GaAs structures

Fast neutron detector based on surface-barrier VPE GaAs structures

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

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