Improving diamond detectors: A device case

Bergonzo, P.; Tromson, D.; Descamps, C.; Hamrita, H.; Mer, C.; Tranchant, Nicolas; Nesládek, Miloš

doi:10.1016/j.diamond.2006.11.099

Cited by 72 publications

(33 citation statements)

References 18 publications

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“…In addition to the influence of N s on the defect levels of the crystals, the more defective nature of the CVD diamonds compared to the HPHT diamond could also be ascribed to their polycrystalline structure as polycrystalline materials have high defect densities due to their non-homogeneous structure (Bergonzo et al, 2007). Particularly, it is well-known that polycrystalline CVD diamonds have a large concentration of grain boundaries (Balducci et al, 2005) where electron traps are concentrated or in more defective regions (Manfredotti et al, 2006).…”

Section: Influence Of Defect and Impurity Levels On The Dose Rate Linmentioning

confidence: 96%

The influence of defect levels on the dose rate dependence of synthetic diamond detectors of various types on exposures to high-energy radiotherapy beams

Ade

Nam

2015

Radiation Physics and Chemistry

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Section: Influence Of Defect and Impurity Levels On The Dose Rate Linmentioning

confidence: 96%

The influence of defect levels on the dose rate dependence of synthetic diamond detectors of various types on exposures to high-energy radiotherapy beams

Ade

Nam

2015

Radiation Physics and Chemistry

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“…Priming Diamond X-ray detectors generally require priming (or pre-irradiation) to stabilise the short-term detector response, through the filling of electronic trap states arising from defects in the diamond [23]. Therefore, prior to measurements, the devices were subjected to a cumulative dose of 1000 MU at 75 kV in two consecutive fractions of 500 MU.…”

Section: Radiation Sourcesmentioning

confidence: 99%

Comparison of natural and synthetic diamond X-ray detectors

Lansley

Betzel

Metcalfe

et al. 2010

Australas Phys Eng Sci Med

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Diamond detectors are particularly well suited for dosimetry applications in radiotherapy for reasons including near-tissue equivalence and high-spatial resolution resulting from small sensitive volumes. However, these detectors have not become commonplace due to high cost and poor availability arising from the need for high-quality diamond. We have fabricated relatively cheap detectors from commercially-available synthetic diamond fabricated using chemical vapour deposition. Here, we present a comparison of one of these detectors with the only commercially-available diamond-based detector (which uses a natural diamond crystal). Parameters such as the energy dependence and linearity of charge with dose were investigated at orthovoltage energies (50-250 kV), and dose-rate dependence of charge at linear accelerator energy (6 MV). The energy dependence of a synthetic diamond detector was similar to that of the natural diamond detector, albeit with slightly less variation across the energy range. Both detectors displayed a linear response with dose (at 100 kV) over the limited dose range used. The sensitivity of the synthetic diamond detector was 302 nC/Gy, compared to 294 nC/Gy measured for the natural diamond detector; however, this was obtained with a bias of 246.50 V compared to a bias of 61.75 V used for the natural diamond detector. The natural diamond detector exhibited a greater dependency on dose-rate than the synthetic diamond detector. Overall, the synthetic diamond detector performed well in comparison to the natural diamond detector.

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“…Such stable behavior is essential for power device applications [4]. The relationship between defects and device properties has been discussed by several research groups [5][6][7][8][9][10]. It is assumed that defects degrade the performance of power devices.…”

Section: Introductionmentioning

confidence: 99%