Present status of an accelerator mass spectrometry (AMS) facility at BINP is described. The AMS facility with addition electric and magnetic analyzers into a terminal of a tandem accelerator is designed for precise analyses of carbon isotopes at extremely low concentration levels.

The project of creation of first Russian accelerator mass-spectrometer at BINP is described. The scheme of AMS includes two types of ion sources (sputter and gaseous ones), low energy beam line with analyzers, electrostatic tandem accelerator with terminal voltage up to 2 MV and magnesium vapors stripper. Also it includes the high energy beam line with analyzers and final detector. The results of first experiments with ion sources are given also.

The project of the first Russian accelerator massspectrometer at BINP is described. The scheme of AMS includes two types of ion sources (sputter and gaseous ones), low energy beam line with analyzers, electrostatic tandem accelerator with terminal voltage up to 2 MV and magnesium vapor stripper. Also it includes the highenergy beam line with analyzers and final detector. The results of first experiments with ion sources are given also.

Here the project of 13-16.5 MeV proton-deuteron accelerator is described. It is proposed to be used as accelerator-injector, or neutron source and also can be utilized for isotopes production for PET. The accelerator is 30 MHz RF cavity with four 0.5-1.6 MeV accelerating gaps and drift tubes of corresponding length. The beam from ion source will be bunched before injection into accelerator. After the direct passage of first four accelerating gaps the beam is bent by ≅225° and returned again into the cavity on the next level. After the next passage of four accelerating gaps the beam is bent again by ≅225° and returned into the cavity. Thus, it crosses the cavity four times perpendicular to its axis on different levels with corresponding change of drift tubes length. As a result protons and deuterons can achieve 13-16.5 MeV energy in the same structure, correspondingly. The preliminary design of cavity was calculated using special computer code SLANS, developed at BINP. The effective shunt impedance of accelerating structure is about 1 MOhm with Q-factor about 20000. The pulsed power of losses does not exceed 1.5 MW.

Novel 2.5 MeV, 40 mA tandem accelerator is presented and discussed. Results of work of ion source and choice of ion optical channel and charge-exchange target are shown. Results of experiments on study of high voltage durability of 45 mm vacuum gap with large square electrodes and determination of dependence of autoemission current/on electric field intensity are reported.

Original 2.5 MeV, 40 mA proton tandem accelerator for the neutron therapy facility is described. The results of computer simulations of high current hydrogen negative ions beam transmission through the special geometry of potential electrodes with vacuum insulation are presented. The results of experiments with prototype vacuum insu- lation tandem accelerator are given also. Various charge- exchange targets are considered. Namely, targets are gas target with outward pumping, gas target with pumping inside of high-voltage electrode.