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Zero-turbulence manifold in a toroidal plasma.

Abstract:

Sheared toroidal flows can cause bifurcations to zero-turbulent-transport states in tokamak plasmas. The maximum temperature gradients that can be reached are limited by subcritical turbulence driven by the parallel velocity gradient. Here it is shown that q/ϵ (magnetic field pitch/inverse aspect ratio) is a critical control parameter for sheared tokamak turbulence. By reducing q/ϵ, far higher temperature gradients can be achieved without triggering turbulence, in some instances comparable to...

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Publication status:
Published

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Journal:
Physical Review Letters
Volume:
109
Issue:
26
Pages:
265001
Publication date:
2012-12-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Source identifiers:
320496
Language:
English
Keywords:
Pubs id:
pubs:320496
UUID:
uuid:1a81211d-be67-4e20-8028-21573e7a2c6d
Local pid:
pubs:320496
Deposit date:
2012-12-19

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