Global and local confinement analysis of JET's VH-mode pulses

K Thomsen; B Balet; D J Campbell; C D Challis; J G Cordey; N Deliyanakis; J J Ellis; C M Greenfield; N Hawkes; D G Muir; D P O'Brien; R Reichle; D Stork; P Stubberfield; P R Thomas

doi:10.1088/0741-3335/36/7A/035

Plasma Physics and Controlled Fusion

Global and local confinement analysis of JET's VH-mode pulses

K Thomsen¹, B Balet¹, D J Campbell¹, C D Challis¹, J G Cordey¹, N Deliyanakis¹, J J Ellis¹, C M Greenfield¹, N Hawkes¹, D G Muir¹, D P O'Brien¹, R Reichle¹, D Stork¹, P Stubberfield¹ and P R Thomas¹

Published under licence by IOP Publishing Ltd
Plasma Physics and Controlled Fusion, Volume 36, Number 7A Citation K Thomsen et al 1994 Plasma Phys. Control. Fusion 36 A243 DOI 10.1088/0741-3335/36/7A/035

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¹ JET Joint Undertaking, Abingdon, UK

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Abstract

Plasmas with the energy confinement time enhanced by a factor 1.4 to 2.1 over the ITER93H-P H-mode scaling expression have been obtained in 3 different H-mode regimes (excluding pellet injection) in JET. The phase of enhanced confinement has strong similarities with the VH-mode observed in DIII-D in all 3 cases. The JET data clearly show VH-mode confinement increasing with plasma current and degrading with loss power.

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Global and local confinement analysis of JET's VH-mode pulses

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