Université Paris-Saclay (Espace Technologique, Bat. Discovery - RD 128 - 2e ét., 91190 Saint-Aubin - France)
Abstract : We propose to use the non-electronic grade (nitrogen content 5 ppb < [N] < 5 ppm) single crystal (sc) chemical vapour deposited (CVD) diamond as a thin-membrane radiation detector. Using deep Ar/O$_2$ plasma etching it is possible to produce self-supported few micrometres thick scCVD membranes of a size approaching 7 mm × 7 mm, with a very good surface quality. After metallization and contacting, electrical properties of diamond membrane detectors were probed with 5.486 MeV $\alpha$-particles as an ionization source. Despite nitrogen impurity, scCVD membrane detectors exhibit stable operation, charge collection efficiency close to 100%, with homogenous response, and extraordinary dielectric strength up to 30 V/$\mu$m.
https://hal-cea.archives-ouvertes.fr/cea-01816364
Contributor : Bruno Savelli <>
Submitted on : Tuesday, September 24, 2019 - 3:13:39 PM Last modification on : Monday, February 10, 2020 - 6:14:10 PM Long-term archiving on: : Sunday, February 9, 2020 - 3:05:40 PM
Michal Pomorski, Benoît Caylar, Philippe Bergonzo. Super-thin single crystal diamond membrane radiation detectors. Applied Physics Letters, American Institute of Physics, 2013, 103, pp.112106. ⟨10.1063/1.4821035⟩. ⟨cea-01816364⟩