Volume 104, Number 2, October 2013
|Number of page(s)||4|
|Published online||26 November 2013|
Pulse height reduction effects of single-crystal CVD diamond detector for low-energy heavy ions
1 The Institute of Physical and Chemical Research (RIKEN) - 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
2 Graduate School of Engineering, Hokkaido University - N13, W8, Kita- ku, Sapporo 060-8628, Japan
3 National Institute of Advanced Industrial Science and Technology (AIST) - 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan
Received: 3 September 2013
Accepted: 28 October 2013
The performance of a diamond detector made of single-crystal diamond grown by chemical vapour deposition was studied for heavy ions, having energy of 3 MeV. Energy peaks of these low-energy ions were clearly observed. However, the pulse height for individual incident ion decreases with increasing atomic number of the ions. For understanding this pulse height reduction effect, we calculated the amount of ionizing and non-ionizing energy loss of incident ions in the diamond detector. The results of our calculation suggest the contribution of charge loss mechanisms other than the recombination effect of electron-hole pairs produced along the ionized track. We also mentioned the incomplete charge collection near the boundary region between the metal electrode and the diamond surface.
PACS: 29.40.Wk – Solid-state detectors / 89.20.Bb – Industrial and technological research and development
© EPLA, 2013
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