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Nonlinear stabilization of tokamak microturbulence by fast ions
- Publication Year :
- 2013
-
Abstract
- Nonlinear electromagnetic stabilization by suprathermal pressure gradients found in specific regimes is shown to be a key factor in reducing tokamak microturbulence, augmenting significantly the thermal pressure electromagnetic stabilization. Based on nonlinear gyrokinetic simulations investigating a set of ion heat transport experiments on the JET tokamak, described by Mantica et al. [Phys. Rev. Lett. 107 135004 (2011)], this result explains the experimentally observed ion heat flux and stiffness reduction. These findings are expected to improve the extrapolation of advanced tokamak scenarios to reactor relevant regimes.<br />Comment: 5 pages, 5 figures
- Subjects :
- Physics - Plasma Physics
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1306.6156
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.111.155001