Photon and electron beam dosimetry with a CVD diamond detector

Fidanzio, A.; Azario, L.; Viola, P.; Ascarelli, P.; Cappelli, E.; Conte, G.; Piermattei, Angelo

doi:10.1016/j.nima.2004.01.056

Cited by 45 publications

(21 citation statements)

References 13 publications

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“…For all the devices under study Δ was found to be in the range 0.97 -0.99 which, according to the model, suggests a uniform trap distribution through the diamond bulk. This values are in agreement with those reported in literature (0.86 -1.035) for both PTW natural single crystal diamonds and CVD synthetic diamond devices [12,13]. The detector sensitivities were found between 4.03 and 4.28 nC/Gy which are comparable with the values calculated in [14] for polycrystalline diamond detectors.…”

Section: Resultssupporting

confidence: 92%

X-ray induced photocurrent characteristics of CVD diamond detectors with different carbon electrodes

et al. 2013

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Diamond has unique properties which make it suitable for a broad range of radiation detection applications ranging from particle timing and spectroscopy, to neutron, UV and X-ray sensors. In X-ray dosimetry, the atomic number of diamond (Z = 6) close to that of the human tissues (Z = 7.42) allows to mimic the real absorbed dose avoiding off-line recalculations. Moreover, its low atomic number and the capability to withstand high radiation fluxes make possible its use as beam monitor without altering significantly the properties of the interacting beam. To preserve the tissue equivalence of the diamond and minimize the perturbation and absorption of the incident beam, diamond detectors based on low thickness and low atomic number electrodes become a requirement. In this paper we present the X-ray detection characteristics of electronic grade CVD diamond sensors prepared in house with thin amorphous carbon electrodes fabricated by Pulsed Laser Deposition (PLD) technique in the fluence range of 2.3 -3.6 J•cm -2 . The devices showed a linear dependence of the induced photocurrent respect to the dose rate. Also, best dynamic response and better stability of the signals were achieved for applied bias up to ±50 V with signal to noise ratio (SNR) of ~300.

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Section: Resultssupporting

confidence: 92%

X-ray induced photocurrent characteristics of CVD diamond detectors with different carbon electrodes

et al. 2013

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“…Exponent values reported in the literature lie in the range 0.92-1 for PTW diamond detectors [24][25][26][27][28][29], 0.86-1.035 for CVD diamond [24,25,[30][31][32], and 0.49-0.97 for HPHT diamond [13,14]. The values observed for the devices fabricated on Diamond Materials and Element Six diamond films are close to one and hence compare well to the literature.…”

Section: Primed Responsesupporting

confidence: 82%

“…A wide range of specific sensitivities have been reported for CVD diamond-based detectors, ranging from a few to over a thousand nC·Gy -1 ·mm -3 ; generally, the lower values (of up to ~100 nC·Gy -1 ·mm -3 ) appear to be reported for polycrystalline material grown in-house by the researchers [8,9,25,30,34], whereas the higher values were obtained using commercial CVD diamond, some of which was described as 'detector grade' [10,24,31,34,35]. Values between 18 and 164 nC·Gy -1 ·mm -3 have been reported for detectors based on HPHT diamonds [14].…”

Section: Primed Responsementioning

confidence: 99%

Investigation of the suitability of commercially available CVD diamond for megavoltage X-ray dosimetry

Lansley

Betzel

Baluti

et al. 2009

Nuclear Instruments and Methods in Physics Research Section A:

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Sandwich-type x-ray detectors were fabricated on commercially-available chemical vapour deposition diamond sourced from three manufacturers: Diamond Materials GmbH, Diamonex, and Element Six. These devices were investigated using Raman spectroscopy and 6 megavolt photons from a clinical linear accelerator. Parameters such as the level of the dark (leakage) and photo-currents, necessary priming dose, linearity of photocurrent with dose rate, and device sensitivity were considered. Device characteristics vary considerably. Devices fabricated using Diamonex material required high priming doses, and displayed high dark currents, low photocurrents (and hence low x-ray sensitivity), and non-linear dose-rate responses. In contrast, devices fabricated from Diamond Materials and Element Six material required lower priming doses, and displayed 'zero' dark currents (beyond the detection limit), higher photocurrents and linear dose-rate responses. In addition, the Element Six devices exhibited less variation in response when irradiated at different angles of incidence.

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“…Raw CVD-diamond samples were produced in the framework of the EC project ''DIAMOND'' [16,20,21,26]. Three of them (MW 1, MW 2a and MW 2b) were produced by Technion e Israel Institute of Technology in Haifa with the use of an ASTEX microwave plasma assisted CVD reactor.…”

Section: Cvd-diamond Samplesmentioning

confidence: 99%

Design and characterization of a tissue-equivalent CVD-diamond detector for clinical dosimetry in high-energy photon beams

et al. 2008

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Photon and electron beam dosimetry with a CVD diamond detector

Cited by 45 publications

References 13 publications

X-ray induced photocurrent characteristics of CVD diamond detectors with different carbon electrodes

X-ray induced photocurrent characteristics of CVD diamond detectors with different carbon electrodes

Investigation of the suitability of commercially available CVD diamond for megavoltage X-ray dosimetry

Design and characterization of a tissue-equivalent CVD-diamond detector for clinical dosimetry in high-energy photon beams

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