Diamond based particle detectors were built up using high quality diamond films grown by microwave chemical vapor deposition (CVD). The efficiency (η) and charge collection distance (CCD) of such devices were tested by a 5.5 Mev 241Am α-particle source. Their response times were then carefully investigated both in the as-grown normal state and after irradiation with β-particles for approximately 60 h, in order to bring the detectors in the so called pumped state. A drastic change in the time evolution, the signal amplitude and the symmetry of the pulse shapes recorded with positive and negative polarization of the detector is observed as soon as the priming procedure takes place. This behavior is explained in the framework of a model in which a trapping-detrapping mechanism for CVD diamond is accounted for. Two different kinds of trapping centers for electrons and holes are proposed as the limiting factor in the diamond detection performance. A very good agreement between the simulation and the experimental pulse shapes is observed, thus allowing a better understanding of the priming procedure and the possible identification of the crystal defects limiting the efficiency of diamond based particle detectors. © 2001 Elsevier Science B.V. All rights reserved.
|Tipologia:||Articolo su rivista|
|Citazione:||Marinelli, M., Paoletti, A., Tucciarone, A., Verona Rinati, G., Angelone, M., & Pillon, M. (2001). Trapping-detrapping behavior in CVD diamond particle detectors. DIAMOND AND RELATED MATERIALS, 10(3-7), 645-649.|
|Settore Scientifico Disciplinare:||Settore FIS/01 - Fisica Sperimentale|
|Revisione (peer review):||Esperti anonimi|
|Digital Object Identifier (DOI):||10.1016/S0925-9635(00)00514-8|
|Stato di pubblicazione:||Pubblicato|
|Data di pubblicazione:||2001|
|Titolo:||Trapping-detrapping behavior in CVD diamond particle detectors|
|Autori interni:||MARINELLI, MARCO |
VERONA RINATI, GIANLUCA
|Autori:||Marinelli, M; Paoletti, A; Tucciarone, A; Verona Rinati, G; Angelone, M; Pillon, M|
|Appare nelle tipologie:||01 - Articolo su rivista|
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