Response of timepix detector with GaAs:Cr and Si sensor to heavy ions

Azm, S. M. Abu Al; Chelkov, G.; Kozhevnikov, D.; Guskov, A.; Lapkin, Alexei; Fabelo, Antonio Leyva; Smolyanskiy, P.; Zhemchugov, A.

doi:10.1134/s154747711603002x

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…The volcano effect is named after its visible manifestation, which is a caldera like hollowing out of the measured energy deposition in the center of a cluster and a net loss of total measured energy deposition with respect to what would be theoretically expected. It has been discussed in a number of articles [8,15] and has only been observed for Timepix detectors operating in hole collection mode, with Timepix detectors collecting electrons seeming to instead exhibit clusters with a 'flat top' [16]. An example of a typical volcano effect cluster is shown in figure 2.…”

Section: The Volcano Effectmentioning

confidence: 99%

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Very high energy calibration of silicon Timepix detectors

et al. 2018

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We investigate energy measurements in Timepix hybrid detectors in hole collection mode above pixel input energy depositions of about 2.2 MeV or 600,000 electron/hole pairs in Silicon. Measurement of the detector response well above this regime is important for our application measuring the heavy ion exposure of NASA astronauts. We find that high input charges produce a double pulse structure in the Timepix front end which creates a taxonomy of different clusters which are observed at accelerators, but not in typical operation on orbit. We investigate the LET response of the Timepix to different heavy ion species and find that for a given polar angle the so called 'volcano effect' can be compensated with a simple power law model. We also characterize the pixel response of the Timepix using mono-energetic stopping protons and derive a per pixel calibration method for correction of the pixel response up to about 8 MeV. We conclude that with an appropriate calibration procedure the Timepix can correctly measure the LET values in excess of 500 keV μm-1 in Silicon for tracks with a polar angle exceeding 60̂, corresponding to the entirety of the cosmic ray spectrum up to Nickel.

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Section: The Volcano Effectmentioning

confidence: 99%

“…The relationship between the measured and predicted most probable LET for several different ion species/energy configurations ( 12 C, 16 O, 20 Ne, 40 Ar, 56 Fe) at 0 and 75 degree polar angle is shown in figure 6. This plot shows that in general the calculated LET can be related to the measured LET with a simple power law fit (i.e.…”

Section: Jinst 13 P11014mentioning

confidence: 99%

Very high energy calibration of silicon Timepix detectors

et al. 2018

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“…8, displaying the time structure of the beam with spills of about 10 s, repeated every minute. The latter scope was to investigate the energy calibration analysis for a Timepix3 sensor, noting the known saturation effect at large energy depositions per pixel [25,26], called the 'volcano effect'. It causes substantially lowered measurement of input charges in a pixel.…”

Section: Characterization Of Primary Uhe Heavy Ion Beammentioning

confidence: 99%

Characterization of Fragmented Ultrahigh-Energy Heavy Ion Beam and Its Effects on Electronics Single-Event Effect Testing

Sacristán Barbero,

Slipukhin,

Cecchetto

et al. 2024

IEEE Trans. Nucl. Sci.

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Ultra-high energy (> 5 GeV/n) heavy ion beams exhibit different properties when compared to standard and high energy ion beams. Most notably, fragmentation is a fundamental feature of the beam that may have important implications for electronics testing given the ultra-high energies, and hence ranges, preserved by the fragments. In this work, both the primary lead ion beam, available in the CERN North Area, and its fragments are characterized by means of solid-state detectors. This input is later used to improve the measurements of Single Event Effects in commercial components with this beam. Moreover, the energy deposition distribution in the solid-state detectors is compared to that obtained with Monte Carlo simulations.

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“…Such behavior is consistent with the interpretation proposed in [20] and is connected with the architecture of the Krummenacher feedback optimized for the h + collection mode in case of the Timepix chip. More detailed information about the response of the GaAs:Cr Timepix detectors to heavy ions can be found in paper [21].…”

Section: Jinst 11 C12070mentioning

confidence: 99%