INITIAL HIGH VOLTAGE TESTS AND BEAM INJECTION EXPERI- MENTS ON BINP PROTON TANDEM-ACCELERATOR.*

The results of the tandem commissioning as initial high voltage tests and beam injection experiments on BINP proton tandem-accelerator are given. The ac-celerator is intended to be used in facilities generat-ing resonant gamma rays for explosives detection and epithermal neutrons for boron neutron-capture ther-apy of brain tumors. A magnetically coupled DC voltage multiplier derived from an industrial ELV-type electron accelerator is used as a high voltage source for the accelerator. A dc high-current nega-tive ion source has been developed for injection into the tandem. In the tandem accelerator there is set of nested potential electrodes with openings which form a channel for accelerating the negative hydrogen ion beam and subsequently accelerating the proton beam after stripping in the gas target. The electrodes are connected to a high voltage feedthrough insulator to which required potentials are applied from the high voltage power supply by means of a resistor voltage divider