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Peripheral radial electric field evolution during the ohmic H-mode transition in the TUMAN-3 M tokamak
| Content Provider | Semantic Scholar |
|---|---|
| Author | Askinazi, L. G. Golant, V. E. Kornev, Vyacheslav A. Krikunov, S. V. Lebedev, Sergey V. Somov, A. Tukachinsky, Alexander Vildjumas, M. I. Zhubr, N. A. |
| Copyright Year | 2004 |
| Abstract | The radial electric field is known to play a key role in confinement improvement during the L-H transition. In the recent experiments on TUMAN-3M, central plasma potential was measured using HIBP, and was found to become more negative after the ohmic H-mode transition [1]. However, the potential changed surprisingly slow in these experiments, thus questioning the whole concept of radial electric field influence on the confinement bifurcation. Due to the plasma accesses limitation, the ion beam could not reach the region of peripheral transport barrier in these experiments, so it was proposed to use electrostatic probes to determine the radial electric field behaviour during the H-mode transition. Peripheral plasma in the TUMAN-3M tokamak is not too hot and dense; this allows the probes of proper design and materials to be positioned somewhat inside the last closed flux surface (LCFS) without a risk of damage and plasma contamination. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://epsppd.epfl.ch/London/pdf/P4_153.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
