Investigation of 3D diamond detector dosimetric characteristics
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-06-11 |
| Journal | Journal of Instrumentation |
| Authors | K. Kanxheri, L. Alunni Solestizi, M. Biasini, M. Caprai, A.C. Dipilato |
| Institutions | Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia |
| Citations | 7 |
Abstract
Section titled āAbstractāRecently, a polycrystalline chemical vapor deposited (pCVD) 3D diamond detector with graphitic in bulk electrodes, fabricated using a pulsed laser technique has been evaluated for photon beam radiation dosimetry during in-air exposure. The same 3D diamond detector, has now been investigated to evaluate its performance under clinically relevant conditions putting the detector inside a Polymethylmethacrylate (PMMA) phantom, to obtain higher precision dosimetric measurements. The detector leakage current was of the order of +/- 25 pA or less for bias voltages up to -100 V. The 3D detector was tested for time stability and repeatability showing excellent performance with less than 0.6% signal variation. It also showed a linear response for low dose rates with a deviation from linearity of 2%. It was also possible to verify the detector response as a function of the depth in PMMA up to 18 cm.