| Autor: |
A R Field, P G Carolan, R J Akers, E R Arends, K Axon, R J Buttery, N J Conway, G F Counsell, G Cunningham, S J Fielding, M Gryaznevich, A Kirk, I P Lehane, B Lloyd, M A McGrath, H Meyer, C Ribeiro, A Sykes, A Tabasso, M R Tournianski, M Valovic, M J Walsh, H R Wilson, the MAST, NBI Teams |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
Plasma Physics and Controlled Fusion. 44:A113-A121 |
| ISSN: |
0741-3335 |
| Popis: |
Operating scenarios in the Mega-Ampere Spherical Tokamak (MAST) have been recently developed to access routinely H-mode plasmas over a wide range of plasma conditions. Gas refuelling at the inboard mid-plane has proved invaluable in facilitating L- to H-mode transitions. Already, a comprehensive range of H-mode behaviour has been observed providing similar and contrasting comparisons with conventional tokamaks. For example, similarities are found in H-mode edge and global evolutions, increases in confinement and ELM behaviour. In contrast, H-mode threshold powers are about an order of magnitude higher in MAST than those predicted by conventional aspect ratio tokamak scalings. At the highest β θ values obtained so far, transient confinement times of ∼100 ms are achieved and calculations indicate that bootstrap currents may approach 50% of the plasma current. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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