This title appears in the Scientific Report :
2006
Please use the identifier:
http://dx.doi.org/10.1063/1.2178176 in citations.
Please use the identifier: http://hdl.handle.net/2128/1888 in citations.
Influence of the boundary conditions on the H-mode power threshold
Influence of the boundary conditions on the H-mode power threshold
The effect of boundary conditions at the last closed magnetic surface (LCMS) on the formation of the edge transport barrier (ETB) in tokamaks is investigated by one-dimensional transport calculations for the radial profiles of plasma parameters. For a given heating power the transition from the low...
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Personal Name(s): | Kalupin, D. |
---|---|
Tokar, M. Z. / Unterberg, B. / Loozen, X. / Pilipenko, D. / Zagórski, R. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP |
Published in: | Physics of plasmas, 13 (2006) S. 032504 |
Imprint: |
[S.l.]
American Institute of Physics
2006
|
Physical Description: |
032504 |
DOI: |
10.1063/1.2178176 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Physics of Plasmas
13 |
Subject (ZB): | |
Link: |
Get full text OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/1888 in citations.
The effect of boundary conditions at the last closed magnetic surface (LCMS) on the formation of the edge transport barrier (ETB) in tokamaks is investigated by one-dimensional transport calculations for the radial profiles of plasma parameters. For a given heating power the transition from the low confinement mode (L mode) to the high confinement mode (H mode) can be triggered by increasing the density e-folding length, delta(n), or reducing the temperature e-folding length, delta(T), at the LCMS. This is explained by the decrease of heat losses from the confined plasma with the convection of charged particles and changeover to the case where losses are mostly due to heat conduction. In such a case, corresponding to a divertor configuration, the computed power threshold for the L- to H-mode transition (L-H transition) is in a good agreement with the experimental multimachine scaling. |