A study of the radiation tolerance of poly-crystalline and single-crystalline CVD diamond to 800 MeV and 24 GeV protons
Authors: Bäni L , Alexopoulos A , Artuso M , Bachmair F , Bartosik M , Beck H , Bellini V , Belyaev V , Bentele B , Bes A , Brom J-M , Bruzzi M , Chiodini G , Chren D , Cindro V , Claus G , Collot J , Cumalat J , Dabrowski A , D’Alessandro R , Dauvergne D , de Boer W , Dick S , Dorfer C , Dünser M , Eremin V , Forcolin G , Forneris J , Gallin-Martel L , Gallin-Martel M-L , Gan K K , Gastal M , Giroletti C , Goffe M , Goldstein J , Golubev A , Gorišek A , Grigoriev E , Grosse-Knetter J , Grummer A , Gui B , Guthoff M , Hiti B , Hits D , Hoeferkamp M , Hofmann T , Hosselet J , Hostachy J-Y , Hügging F , Hutton C , Janssen J , Kagan H , Kanxheri K , Kasieczka G , Kass R , Kis M , Kramberger G , Kuleshov S , Lacoste A , Lagomarsino S , Lo Giudice A , Paz I Lopez , Lukosi E , Maazouzi C , Mandic I , Mathieu C , Menichelli M , Mikuž M , Morozzi A , Moss J , Mountain R , Oh A , Olivero P , Passeri D , Pernegger H , Perrino R , Piccini M , Picollo F , Pomorski M , Potenza R , Quadt A , Rarbi F , Re A , Reichmann M , Roe S , Becerra D A Sanz , Scaringella M , Schaffner D , Schmidt C J , Schnetzer S , Schioppa E , Sciortino S , Scorzoni A , Seidel S , Servoli L , Smith D S , Sopko B , Sopko V , Spagnolo S , Spanier S , Stenson K , Stone R , Sutera C , Traeger M , Trischuk W , Truccato M , Tuve C , Velthuis J , Venturi N , Wagner S , Wallny R , Wang J C , Weingarten J , Weiss C , Wengler T , Wermes N , Yamouni M , Zavrtanik M 
Published: August 2019

Abstract
We have measured the radiation tolerance of poly-crystalline and single-crystalline diamonds grown by the chemical vapor deposition (CVD) process by measuring the charge collected before and after irradiation in a 50

m pitch strip detector fabricated on each diamond sample. We irradiated one group of sensors with 800 MeV protons, and a second group of sensors with 24 GeV protons, in steps, to

protons cm−2 and

protons cm−2 respectively. We observe the sum of mean drift paths for electrons and holes for both poly-crystalline CVD diamond and single-crystalline CVD diamond decreases with irradiation fluence from its initial value according to a simple damage curve characterized by a damage constant for each irradiation energy and the irradiation fluence. We find for each irradiation energy the damage constant, for poly-crystalline CVD diamond to be the same within statistical errors as the damage constant for single-crystalline CVD diamond. We find the damage constant for diamond irradiated with 24 GeV protons to be

and the damage constant for diamond irradiated with 800 MeV protons to be

. Moreover, we observe the

pulse height decreases with fluence for poly-crystalline CVD material and within statistical errors does not change with fluence for single-crystalline CVD material for both 24 GeV proton irradiation and 800 MeV proton irradiation. Finally, we have measured the uniformity of each sample as a function of fluence and observed that for poly-crystalline CVD diamond the samples become more uniform with fluence while for single-crystalline CVD diamond the uniformity does not change with fluence.