An overview of studies into the physics and technology of ion and neutral beams carried out at the Bunker Institute of Nuclear Physics, SB RAS since 1960 up to now is presented. These studies were initiated by Academician G I Budker for the charge-exchange injection of particles into storage rings. Subsequently, a whole series of ion sources were created and particle beams were produced for applications in accelerators and plasma devices for plasma heating and diagnostics.
A prototype of a powerful high-voltage neutral beam injector, based on acceleration of negative hydrogen ions and their neutralization, is under development at Budker Institute of Nuclear Physics (BINP). The design of the BINP high-voltage injector includes several innovative components, important for injector operation stability and overall efficiency. It includes a multi-aperture long-pulse surface-plasma negative ion source with thermostabilized grid, ithe magnetic system with concaved field lines in the ion-optic system (IOS) and the distributed cesium deposition system. The injector scheme incorporates a wide-aperture low-energy beam transport (LEBT) section, plasma target for negative ionneutralization, and recuperators of non-neutralized ions. Several test stands were constructed at BINP for injector component studies. This paper describes the results of experiments on negative ion beam production, transport through LEBT, ion acceleration to energy up to 240 keV and transport through the high voltage beam transport (HEBT) section to the distance ∼10 m from the source. The parameters of the transported beam, which were measured at several points along the beam line and at the beam dump calorimeter, are presented. The beam transport efficiency as a function of various ion source, LEBT and HEBT parameters is measured and compared with the calculated values. The results dof plasma neutralization target study are presented as well.
A possible scheme is presented for the injection of high-power atomic beams within the project of the tokamak with reactor technologies (TRT), which is being developed. In each of the two TRT injection ports, it is proposed to install the two-beam injection complex consisting of two high-energy (500 keV) injectors arranged vertically one above the other. A prototype of such an injector is being developed at the Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences (BINP). For each of the BINP-developed high-voltage injectors, it is proposed to separately form the beam of negative hydrogen ions, accelerate it using the separate single-aperture accelerating tube, and neutralize it in the efficient plasma neutralizer. The power of each two-beam complex will initially be 7 and ~5.7 MW for hydrogen and deuterium atoms, respectively. In the future, it is planned to increase the total injection power up to 20 MW by increasing the energy and current of the beams used in the injection complexes. For the TRT facility, a possible scheme is discussed for the injectors of fast deuterium atomic beams with energies of up to 200 keV based on positive ions.
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