Static and dynamic behaviour of plasma detachment in the divertor simulator experiment NAGDIS-II

DOI Web Site 被引用文献83件

書誌事項

公開日
2001-08
DOI
  • 10.1088/0029-5515/41/8/309
公開者
IOP Publishing

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説明

A comprehensive investigation has been performed of the static and dynamic behaviour of detached recombining plasmas in the linear divertor plasma simulator NAGDIS-II. For stationary plasma detachment, the transition from electron-ion recombination (EIR) to molecular activated recombination (MAR) has been observed by injecting hydrogen gas into high density helium plasmas. The particle loss rate due to MAR is found to be comparable to that of EIR. Experiments have also been performed by the injection of a plasma heat pulse produced by RF heating into the detached helium plasma to demonstrate the dynamic behaviour of volumetric plasma recombination. Negative spikes in the Balmer series line emission were observed and found to be similar to the so called negative ELM observed in tokamak divertors. Observed Balmer spectra were analysed in detail using the collisional-radiative model. A rapid increase of the ion flux to the target plate was observed associated with the re-ionization of the highly excited atoms generated by EIR.

収録刊行物

  • Nuclear Fusion

    Nuclear Fusion 41 (8), 1055-1065, 2001-08

    IOP Publishing

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