Synthetic single crystal diamond diodes for radiotherapy dosimetry

Synthetic single crystal diamonds in a p-type/intrinsic/metal structure were tested as dosimeters for radiotherapy. The devices have been analyzed by using 6 and 10 MV Bremsstrahlung X-ray beams and electron beams from 6 MeV up to 18 MeV from a CLINAC DHX Varian accelerator. All measurements have be...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2008-09, Vol.594 (2), p.273-277
Main Authors: Almaviva, S., Marinelli, Marco, Milani, E., Tucciarone, A., Verona-Rinati, G., Consorti, R., Petrucci, A., De Notaristefani, F., Ciancaglioni, I.
Format: Article
Language:English
Subjects:
Radiotherapy dosimeter
Single crystal diamond
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Summary:Synthetic single crystal diamonds in a p-type/intrinsic/metal structure were tested as dosimeters for radiotherapy. The devices have been analyzed by using 6 and 10 MV Bremsstrahlung X-ray beams and electron beams from 6 MeV up to 18 MeV from a CLINAC DHX Varian accelerator. All measurements have been performed in a water phantom and ionization chambers were used for calibration and comparison. The dosimeters were operated in photovoltaic regime with no external bias voltage applied. A few Gy pre-irradiation was performed in order to stabilize the device output, resulting in fluctuations sensitivity below ±0.5%. No dose rate dependence of the detector response was observed. Very good reproducibility and linearity were obtained as well.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2008.06.028