[22a-F308-1~10] 2.1 Detection Devices

[22a-F308-1] Measurement of dose distribution of clinical carbon beam through radiation-induced current induced in 4H SiC Schottky Barrier Diode

〇(M1)Yudai Arai^1,2, Kei Kubodera¹, Kohei Yamaguchi¹, Yokota Ryou¹, Takumi Matsumoto¹, Takeshi Ohshima², Takahiro Makino², Makoto Sakai³, Akihiko Matsumura³, Wataru Kada¹, Norihiro Hoshino⁴, Hidekazu Tsuchida⁴ (1.Gunma Univ., 2.QST, 3.GHMC, 4.CRIEPI)

Keywords:Semiconductor detector, Schottky barrier diode, 4H-SiC

As the heavy particle cancer therapy technology becomes more sophisticated, more advanced dosimetry is required. We have focused on 4H-SiC Schottky barrier diodes (SBD), which have excellent radiation tolerance, and have been investigating its application as semiconductor-based dosimeters. In this study, measurement of radiation-induced transient current (RIC), which current responses intensity of radiation exposure in real time, was demonstrated at a clinical carbon therapy field. Results revealed that RIC obtained through 4H SiC SBD was capable to be measured even at clinical intensity and possible to illustrate the dose distribution of carbons at each depth of the Bragg peak.