JETプラズマに見るトカマク・プラズマの現状と課題
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概要
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Present status of JET plasma as a typical example of the large tokamak plasma (up to the end of 1985) is reported. Surveys are done on 1) Impurity and radiation problems, 2) Magnetics, 3) Plasma density, n, the density limit and particle control problems (fueling and exhausting), 4) Plasma temperature, T, in connection to the ICRF wave heating and giant sawtooth activity and 5) Energy confinement time, τ<SUB>E</SUB>, and the scaling laws. The highest value of nT τ<SUB>E</SUB> has been obtained during the ohmic discharges and it will be a hard task to obtain an objective nT τ<SUB>E</SUB> value from the present scaling. Subjectives are discussed in relation to the near future plan of the experiments, i. e., 1) Input power upgrade, 2) Separatrix operation, 3) Combined operation of heating and current drive, 4) Surpression of sawtooth activities by RF, 5) Pellet injection and 6) inner limiter discharges. Miscellaneous thoughts concerning on the plasma disruption (self-selection) and the profile consistency (self-organization) are made from the view point of a theorist.
- 社団法人 プラズマ・核融合学会の論文