Heating of Plasma by Neutral Beam Injection

Neutral beam heating of a RFP plasma in MST

Improving RAPTOR tokamak plasma profile simulations: Neutral Beam Injection module and automated model parameter optimization

The q-profile, also known in literature as the safety factor profile, is an important quantity because it determines the stability as well as the performance of a fusion plasma. A strong degree of control over this q-profile makes the operation of a tokamak fusion reactor more stable (avoidance of plasma instabilities) and efficient (optimal q-profile shape). Control of the q-profile can be ach...

Development of radial neutral beam injection system on LHD

A radial Neutral Beam Injector (NBI) is newly installed on the Large Helical Device (LHD). The aims of the NBI are its usage as a diagnostic NB for charge exchange recombination spectroscopic measurement and using the NB as a heating source for ions in plasmas. A new positive-ion source was developed for this NBI at NIFS. The structure of the cusp field of the source was determined by the numer...

Bunched Beam Injection in a Plasma Accelerator

An experiment on phase-locked injection of ~ 100 fs electron bunches in a plasma beat wave accelerator is presented. We consider using an IFEL microbunching technique to produce ultrashort electron bunches prebunched at the exact wavelength of the plasma wave 340 Jim (~lTHz). It is proposed to generate 100 MW of 1 THz radiation by difference frequency generation in a nonlinear crystal, mixing t...

FT/P2-30 Focused Neutral Beam With Low Chaotic Divergence For Plasma Heating And Diagnostics in Magnetic Fusion Devices

A series of neutral beam injectors has been developed in the Budker Institute of Nuclear Physics, Novosibirsk for plasma heating and diagnostics in modern fusion devices. Ion optical system of these injectors is optimized to produce ion beams with low angular divergence. In order to provide beam focusing, the grids are formed as spherical segments. Such geometrically focused beams are neutraliz...