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Report No.
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Charge induced in 6H-SiC pn diodes by irradiation of oxygen ion microbeams

Oshima, Takeshi; Sato, Takahiro; Oikawa, Masakazu*; Onoda, Shinobu; Hirao, Toshio; Ito, Hisayoshi

Charge induced in 6H-SiC pn diodes by oxygen ion microbeams was examined in an energy range between 6 and 18 MeV. To minimize the influence of damage, single ion hit Transient Ion Beam Induced Current (TIBIC) measurement system, in which the transient current induced by single ion incidence can be measured, was used in this study. The value of charge increases with increasing reverse applied bias, and the saturation of charge is observed when the depletion layer becomes longer than ion range. An increase of collected charge by the funneling effect (the generation of a transient electric filed) is observed in the case of the depletion layer shorter than ion range. The charge collection efficiency is estimated to be 100 % in the saturation region (the depletion layer longer than ion range). It strongly suggests that high quality particle detectors are fabricated using SiC.

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