본 논문에서는 원자력병원에 설치된 50MeV-proton싸이클로트론의 진공계통에 관한 일반적인 특성과 측정된 진공결과를 기술하고 있다. 진공장치는 5개의 그룹으로 구성되어 있으며, 동작순서는 EPROM-PC장치에 의해 자동제어된다. 정상가동중의 도달 진공도는 각각 $5{ imes}10^{-6}mbar(I,;II),;2{ imes}10^{-6}mbar(III),;1.2{ imes}10^{-5}mbar(IV),;1.5{ imes}10^{-6}mbar(V)$였으며 이 진공도는 50MeV-proton빔을 가속하기에 충분함을 보여 주었다.
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 $5{ imes}10^{-6}mbar(I,;II),;2{ imes}10^{-6}mbar(III),;1.2{ imes}10^{-5}mbar(IV),;1.5{ imes}10^{-6}mbar(V)$, respectively. It was confirmed that these pressures was enough to accelerate the 50 MeV-proton beam.
