Study on the Vacuum System of the KCCH-50MeV Cyclotron
Park, Joo-Shik;Chai, Jong-Seo;Yoo, Seong-Yul;
ABSTRACT
In this paper, general features and measured results of vacuum pressure on the vacuum system of 50 MeV proton KCCH-cyclotron which was installed in Korea Cancer Center Hospital are described. The vacuum system comprises five subgroups and the operating sequences are automatically controlled by EPROM-programmable controller. In normal operation, the obtained ultimate pressures of vacuum groups were $5{times}10^{-6}mbar(I,;II),;2{times}10^{-6}mbar(III),;1.2{times}10^{-5}mbar(IV),;1.5{times}10^{-6}mbar(V)$, respectively. It was confirmed that these pressures was enough to accelerate the 50 MeV-proton beam.