Noninductive plasma initiation and startup in the DIII-D tokamak. Jackson, G., L., Humphreys, D., A., Hyatt, A., W., Lohr, J., M., Luce, T., C., & Yu, J., H. Nuclear Fusion, 51(8):83015, 2011.
Noninductive plasma initiation and startup in the DIII-D tokamak [pdf]Paper  Noninductive plasma initiation and startup in the DIII-D tokamak [link]Website  abstract   bibtex   
Noninductive plasma startup with second harmonic electron cyclotron heating has been studied in DIII-D. Plasma currents up to 33鈥塳A have been obtained in this phase. The maximum current obtained was primarily limited by the experimental time and does not necessarily represent the highest achievable current. The dominant physical mechanism for the observed current is the Pfirsch鈥揝chl眉ter current on open field lines. Closed flux surfaces have been observed, but in a rather limited region, compared with previous experiments in spherical tokamaks. This method of plasma initiation and initial current ramp might be used in future burning plasma devices in conjunction with other current drive techniques to provide a fully noninductive startup.

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