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Radiation power measurement on the ADITYA tokamak

Kumudni Tahiliani, Ratneshwar Jha, M V Gopalkrishana, Kalpesh Doshi, Vipal Rathod, Chandresh Hansalia, the ADITYA team2009年Plasma Physics and Controlled FusionIF 2.2出版社

The radiation power loss and its variation with plasma density and current are studied in the ADITYA tokamak. The radiation power loss varies from 20% to 40% of the input power for different discharges. The radiation fraction decreases with increasing plasma current but it increases with increasing line-averaged central density. The radiated power behavior has also been studied in discharges with short pulses of molecular beam injection (MBI) and gas puff (GP). The increase in radiation loss is limited to the edge chords in the case of GP, but it extends to the core region for MBI fueling. The MBI seems to indicate reduction in the edge recycling. It is observed that during the density limit disruption, the radiated power loss is more in the current quench phase as compared with the thermal quench phase and comes mainly from the plasma edge.

日本語訳

ADITYAトカマクにおいて、放射パワー損失とそのプラズマ密度および電流に対する変化が研究された。放射パワー損失は、異なる放電に対して入力パワーの20%から40%の範囲で変化する。放射割合はプラズマ電流の増加とともに減少するが、線平均中心密度の増加とともに増加する。放射パワーの挙動は、分子ビーム入射(MBI)とガスパフ(GP)の短パルスを用いた放電においても研究された。放射損失の増加は、GPの場合にはエッジコードに限定されるが、MBI燃料供給の場合にはコア領域に及ぶ。MBIはエッジリサイクリングの低減を示しているように思われる。密度限界ディスラプション中、放射パワー損失は熱クエンチ相と比較して電流クエンチ相でより大きく、主にプラズマエッジから生じることが観測された。

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