Abstract
A charged-particle detector was fabricated using a single-crystal diamond grown by chemical vapor deposition to examine its radiation hardness under heavy-ion bombardment. The irradiation dose dependence of the output pulse height from the diamond detector during gold ion beam bombardment at an energy of 7 MeV was investigated. The pulse height of output signals decreased with increasing amount of gold ion irradiation, and the pulse height was not recovered after applying a reverse-bias voltage. In addition, although only small amounts of vacancy and charge density generation inside the diamond detector were estimated and were found to be less than those in the Si detector by the Monte Carlo simulation of the Stopping and Range of Ions in Matter, the diamond detector did not show superior radiation hardness to the Si charged-particle detector.
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