Charge-collection efficiency of single-crystal CVD diamond detector for low-energy charged particles with energies ranging from 100 keV to 2 MeV

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• 作者：Yuki Sato^a ; ^{sato.yuki@jaea.go.jp" class="auth_mail" title="E-mail the corresponding author} ; Hiroyuki Murakami^b ; Takehiro Shimaoka^c ; Masakatsu Tsubota^c ; Junichi H. Kaneko^c
• 关键词：Diamond detector ; Single-crystal CVD diamond ; Charge-collection efficiency ; Charged-particle detection ; Ion-beams
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：21 October 2016
• 年：2016
• 卷：834
• 期：Complete
• 页码：218-222
• 全文大小：828 K

文摘

The performance of a diamond detector created from a single-crystal diamond grown by chemical vapor deposition was studied for application in detecting charged particles having energies ranging from 100 keV to 2 MeV. Energy peaks of different low-energy ions were clearly observed. However, we observed that the pulse height for individual incident ions decreases with increasing atomic number of the ions. We estimated the charge collection efficiency of the generated charge carriers by the incident charged particles. The charge collection efficiencies are 97.0 ± 0.7% for 2 MeV helium-ions (He⁺). On the other hand, compared with that of He⁺, silicon-ions (Si⁺) and gold-ions (Au³⁺) show low charge collection efficiency: 70.6 ± 2.2% and 29.5 ± 4.2% for 2 MeV-Si⁺ and 2 MeV-Au³⁺, respectively. We also found that the charge collection efficiency decreases as the generated charge density inside the diamond crystal increases.