Conceptual design of NBI beamline for VEST plasma heating
| Autor: | Seung Ho Jeong, Kwang Won Lee, Sang-Ryul In, Min Park, Bongki Jung, Tae-Seong Kim, Doo-Hee Chang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Tokamak business.industry Mechanical Engineering Cryopump Plasma Injector 01 natural sciences Ion source Neutral beam injection 010305 fluids & plasmas law.invention Optics Nuclear Energy and Engineering Beamline Physics::Plasma Physics law 0103 physical sciences Physics::Accelerator Physics General Materials Science Atomic physics business Beam (structure) Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. :411-415 |
| ISSN: | 0920-3796 |
| Popis: | A 10 m s-pulsed NBI (Neutral Beam Injection) system for VEST (Versatile Experiment Spherical Torus) plasma heating is designed to provide a beam power of more than 0.6 MW with 20 keV H° neutrals. The VEST NBI injector is composed of 2 sets of 20 keV/25A magnetic cusp type bucket ion source, neutralizer ducts, residual ion dump, NB vessel with a cryopump, and rotating calorimeter. The position and size of these beamline components are roughly determined with geometric calculation of beam power transmission: the overall length of beamline is 1.8 m, spacing between ground grid and neutralizer of 1.0 m, and position of residual ion dump is 0.8 m downstream from the neutralizer exit. Optimizing the gas feed between ion source and neutralizer can leads to a neutralization efficiency of ∼76%. Finally, the beam power of maximum 0.6 MW can be delivered to the VEST plasma with a beam loss of 10%. |
| Databáze: | OpenAIRE |
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