Theory-based scaling of the SOL width in circular limited tokamak plasmas

A theory-based scaling for the characteristic length of a circular, limited tokamak scrape-off layer (SOL) is obtained by considering the balance between parallel losses and non-linearly saturated resistive ballooning mode turbulence driving anomalous perpendicular transport. The SOL size increases with plasma size, resistivity, and safety factor q. The scaling is verified against flux-driven non-linear turbulence simulations, which reveal good agreement within a wide range of dimensionless parameters, including parameters closely matching the TCV tokamak. An initial comparison of the theory against experimental data from several tokamaks also yields good agreement.


Published in:
Nuclear Fusion, 53, 12, 122001
Year:
2013
Publisher:
Bristol, Iop Publishing Ltd
ISSN:
1741-4326
0029-5515
Keywords:
Laboratories:
SPC
CRPP




 Record created 2015-08-13, last modified 2018-09-13

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