A Vacuum Electrostatic Generator
1465 A VACUUM ELECTROSTATIC GENERATOR B.H. Choi, H.D. Kang, W. Kim, B.H. Oh, Korea Advanced Energy Research Institute Daeduk-Danji, Choongnam, 301-353, Korea and K.H. Chung Seoul National University Shinrim-Dong, Kwanak-Ku, Seoul, 151-741, Korea Abstract insulator supports the breakdown strength is limited to about 30 kV/cm due to the flashover phenomena on A compact electrostatic generator designed with the insulator surface. the principle of vacuum insulation has been developed. The concept of vacuum insulation instead of gas It consists of a rotating insulation disk with charge- insulation for the electrostatic generator design has carrying conductors placed around the circumference some advantages, such as the capability to hold the n n ti a non-contact induction system with R” electron high voltage in narrow inductor gap, elimination cf gun. The usable voltage of 130 kV with the generating the electrical cant acr problem by utilizing the current of about 300 pA has been obtained at the oper- non-contact induction method, posstbility of fice ational pressure of 1x10-’ torr. regulation of high voltage, and reduction cf frictional wind loss and the mechanical vibration. In Introduction addition, elimination of gas handling system may enhance the compactness and the flexibilities for the The recent progress of research and industrial accelerator system. The characteristics and the applications of ion beams require very stable beams operational performance of this vacuum electrostatic with the high energy of around 1 MeV and the current generator have been described in this paper. of a few mA. A candidate of high voltage sources to produce Experimental Apparatus mono-energetic beams is electrostatic generator, which has superior features such as small voltage ripple and The schematic drawins of the vacuum electrostatic small stored energy in the state of ultra high generator is shown in Fig.
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