This title appears in the Scientific Report :
2004
Please use the identifier:
http://hdl.handle.net/2128/1800 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.92.215001 in citations.
Nature of the isotope effect on transport in tokamaks
Nature of the isotope effect on transport in tokamaks
The reduction of energy and particle losses with the increasing mass of the hydrogen isotope is more pronounced under conditions of improved confinement when the dominant ion temperature gradient instability is suppressed and other channels of anomalous transport are of importance. In this Letter, w...
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Personal Name(s): | Tokar, M. Z. |
---|---|
Kalupin, D. / Unterberg, B. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP |
Published in: | Physical review letters, 92 (2004) S. 215001 |
Imprint: |
College Park, Md.
APS
2004
|
Physical Description: |
215001 |
DOI: |
10.1103/PhysRevLett.92.215001 |
Document Type: |
Journal Article |
Research Program: |
Kernfusion und Plasmaforschung |
Series Title: |
Physical Review Letters
92 |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.92.215001 in citations.
The reduction of energy and particle losses with the increasing mass of the hydrogen isotope is more pronounced under conditions of improved confinement when the dominant ion temperature gradient instability is suppressed and other channels of anomalous transport are of importance. In this Letter, we reconsider the dissipative trapped electron (DTE) instability by taking into account finite Larmor radius effects in the analysis of the ion response to perturbations. By applying the improved mixing length approximation in order to estimate the transport coefficients, it is demonstrated that DTE contribution is intrinsically dependent on the isotope mass and provides a plausible explanation for the isotope effect. Contrary to the common belief, it is shown that the DTE turbulence may be of importance for reactor plasmas of low collisionality. |