Design of Neutral Beam-Line of EAST

Abstract

Neutral beam injector for EAST is designed to deliver deuterium beams with a power of 2 MW to 4 MW at an energy of 50 keV to 80 keV into the plasma with a beam dimension of 12 cm × 48 cm. Considering the beam generation and transmission, a columniform beam-line of Φ 250 cm × 400 cm is designed with a neutralizer, ion dump, calorimeter, bending magnet and cryopanels. The arrangement of the internal elements for the beam-line is reported. A rectangular sleeve coupled to the ion source is employed as the neutralizer. At the downstream of the neutralizer, a dipole magnet separates the residual ions from the beam passage with a reflection radius of 42 cm for the full energy particles. The calorimeter and the ion dump serve as high heat flux components, which will work as thermal inertia targets in the first phase of operation.

Design of EAST Neutral Beam Injector Ion Source Electrode Grids Breaking Down Detection and Protection System Based on DSP Technology

“…A powerful high-current ion source is one of the key components of NBI system and also the most precision part [1]. Extraction system and plasma generator consists of ion source [2]. The extraction system has a four-stage electrode grids, which are plasma grid, gradient grid, suppressor grid and exit grid [3].…”

High-Speed Optical Signal Processing System Based on DSP for Neutral Beam Injector on EAST

“…NBI is one of main heating methods for most of fusion experiments worldwide [1,2]. EAST-NBI is building two neutral beam injectors, each one is in 50-80 KeV beam energy and 2-4 MW power energy [3,4].…”

Ion beam optics analysis and beam transmission simulation in the reflection magnet of the EAST NBI system

“…One beam line of the EAST NBI system includes two high current ion sources and it will provide 4 MW neutral deuterium beam for heating plasma and attaining an advanced tokamak operation [4][5][6].…”