Charge carrier properties of single-crystal CVD diamond up to 473 K

Kraus, Benjamin; Steinegger, P.; Aksenov, N. V.; Dressler, R.; Eichler, Robert; Griesmayer, E.; Herrmann, Dominik; Türler, Α.; Weiß, C.

doi:10.1016/j.nima.2020.164947

Cited by 9 publications

(8 citation statements)

References 32 publications

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“…The use of shallow probing beams allows one to study the charge transport properties induced by only one type of free carrier [ 47 ]. In our experimental configuration, the induced current was mainly governed by the holes when a positive polarity was applied, while negative polarity induced currents that were governed mainly by electrons motion.…”

Section: Methodsmentioning

confidence: 99%

Ion Microprobe Study of the Polarization Quenching Techniques in Single Crystal Diamond Radiation Detectors

et al. 2022

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Synthetic single crystal diamond grown using the chemical vapor deposition technique constitutes an extraordinary candidate material for monitoring radiation in extreme environments. However, under certain conditions, a progressive creation of space charge regions within the crystal can lead to the deterioration of charge collection efficiency. This phenomenon is called polarization and represents one of the major drawbacks associated with using this type of device. In this study, we explore different techniques to mitigate the degradation of signal due to polarization. For this purpose, two different diamond detectors are characterized by the ion beam-induced charge technique using a nuclear microprobe, which utilizes MeV energy ions of different penetration depths to probe charge transport in the detectors. The effect of polarization is analyzed by turning off the bias applied to the detector during continuous or discontinuous irradiation, and also by alternating bias polarity. In addition, the beneficial influence of temperature for reducing the effect of polarization is also observed. Finally, the effect of illuminating the detector with light is also measured. Our experimental results indicate that heating a detector or turning off the bias, and then applying it during continuous irradiation can be used as satisfactory methods for recovering the CCE value close to that of a prepolarized state. In damaged regions, illumination with white light can be used as a standard method to suppress the strength of polarization induced by holes.

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Section: Methodsmentioning

confidence: 99%

Ion Microprobe Study of the Polarization Quenching Techniques in Single Crystal Diamond Radiation Detectors

et al. 2022

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“…The induced charge (current) is thus proportional to the deposited energy; this is fundamental to any radiation detector device. The drifting time t c depends upon the applied electrical field (see Figure 11b) and temperature [154]. Each single e or h induces thus a rectangular pulse on the electrode whose amplitude is given by Equation ( 17), and the width is dictated by its drifting velocity.…”

Section: Shape Of the Electrical Signalmentioning

confidence: 99%

“…Studies of diamond detectors operating at HT date back to the beginning of the 2000s when the first artificial SCD films become available and are still ongoing [128,153,154,[195][196][197][198][199][200][201][202]202] reports on the irradiation at HT using protons. Usually, the detectors are studied while operating in pulse (spectrometric) mode, and PHS are recorded versus temperature to measure the variation of the detector performances (CCE, energy resolution at FWHM, peak centroid, and area).…”

Section: Operation Of Diamond Detectors At High Temperaturementioning

confidence: 99%

Properties of Diamond-Based Neutron Detectors Operated in Harsh Environments

Angelone

Verona

2021

JNE

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Diamond is widely studied and used for the detection of direct and indirect ionizing particles because of its many physical and electrical outstanding properties, which make this material very attractive as a fast-response, high-radiation-hardness and low-noise radiation detector. Diamond detectors are suited for detecting almost all types of ionizing radiation (e.g., neutrons, ions, UV, and X-ray) and are used in a wide range of applications including ones requiring the capability to withstand harsh environments (e.g., high temperature, high radiation fluxes, or strong chemical conditions). After reviewing the basic properties of the diamond detector and its working principle detailing the physics aspects, the paper discusses the diamond as a neutron detector and reviews its performances in harsh environments.

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“…In addition, a drastic improvement towards high-temperature alpha-detector technology is essential for efficiently identifying less volatile SHEs in gas adsorption chromatography experiments. Diamond- as well as SiC-based detectors have caught the attention of scientists with promising developments on their way 15 . Meanwhile the more stringent time constraints imposed by the short half-lives may be tackled by gas stopping cells.…”

Section: Chemistry Experiments With New Elementsmentioning

confidence: 99%