Charge collection efficiency of scCVD diamond detectors at low temperatures

Cosic, D.; Provatas, G.; Jakšić, Milko; Begušić, D.

doi:10.1016/j.diamond.2022.109184

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…In an ideal case, the current response of a 500 µm-thick diamond radiation detector is expected to rise as the bias voltage is increased [12]. However, as shown in Figure (5), the current response of the detector under PB test method, did not show a consistent increase, rather it peaked at +140 V, and became erratic as the bias voltage was further raised.…”

Section: Resultsmentioning

confidence: 94%

“…Both 12 C and 13 C could capture a neutron and absorb its energy, the most prominent reactions of which are 12 C(n,) 9 Be, 12 C(n, n+2) 4 He, and 13 C(n,) 10 Be, which yield 6 -10 MeV per interaction [6]. Additionally, neutrons could elastically scatter off 12 C and 13 C atoms, which deposits 1.8 to 2.0 MeV per interaction. Lastly, even though less frequently, neutrons could cause (n,) reaction which generates a gamma ray with several MeV energy.…”

Section: Introductionmentioning

confidence: 99%

“…However, in a practical detector, charge carriers often can get trapped at various defect sites such as: inclusions, grain boundaries, and plane dislocations in the diamond bulk [9 Besides the detection mechanism by its principles creates further inclusions, vacancies and damages.]. Several reports indicate that the density of traps in a SC CVD diamond detector increases progressively over a duration of each continuous use [7][8][9][10][11][12]. The accumulation of charges at defect sites as shown in Figure ( 1) could then result in an emergence of an internal electric field (E in ) between oppositely charged defect sites.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Direct current mode neutron detection, investigation of polarization effect on 500 μm single crystal CVD diamond detector, and depolarization techniques

Ayalew,

Guckes,

Buckles

et al. 2023

Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXV

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Electronic grade diamond such as single crystal (SC) chemical vapor deposition (CVD) diamond has excellent optoelectronic properties, which enables it to be used as a detector material for high energy detector applications. However, SC CVD diamond suffers from loss of signal contrast and performance over a period of continuous use due to polarization of the detector. When a SC CVD diamond is continuously exposed to radiation, trapped charge carriers build up at defect sites, resulting in the creation of a secondary electric field opposite to the bias field. The emergence of the secondary electric field causes charge collection efficiency loss and reduces the overall performance of the detector. In this work, the effect of polarization on the direct current (DC) neutron response of a 500 µm SC CVD diamond detector was investigated by irradiating the detector with 14.1 MeV neutrons produced from a deuterium-tritium neutron generator. Depolarization techniques were employed to de-trap charge carriers and decrease the strength of the secondary electric field. This was primarily through reverse biasing the applied field yet included scenarios with and without short-lived neutron irradiation. The results indicated that both without and with neutron irradiation techniques improved the stability of the detector response. The latter showed a superior stability at higher bias fields.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%