1997 Fiscal Year Final Research Report Summary

Physics of The Upper Limit of Electron Density of Tokamak Plasma

Research Project

Project/Area Number	08680512
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Single-year Grants
Section	一般
Research Field	プラズマ理工学
Research Institution	Faculty of Engineering, SEIKEI University
Principal Investigator	MIYAMOTO Kenro Department of Applied Physics, Faculty of Engineering, SEIKEI University, Professor, 工学部, 教授 (60023701)
Project Period (FY)	1996 – 1997
Keywords	Scrape-Off-Layr (SOL) / Tokamak / Divertor / Detached Plasma / Two Point SOL Model
Research Abstract	The relations between electron temperature T_<eS>, electron density n_<eS> in a scrape-off-layr (SOL) of tokamak, electron temperature T_<eD>, electron density n_<eD> near divertor plate and heat load q_* across separatrix are studied by a two points SOL model, which includes the effects of recent experimental observations such as the difference of electron and ion temperatures as well as the difference of radial decay lengths of electron temperature and density. This model adapts the boundary condition of constant electron temperature at the separatrix. The various SOL parameters are calculated by this model and compared with the experimental results of JT60U,JET and Alcator C Mod. They are consistent with each other. The scaling of SOL parameters of detached plasma are derived. The SOL parameters of ITER (Internation Tokamak Experimental Reactor) are predicted by this model.