Resonant magnetic perturbations
Resonant magnetic perturbations (RMPs) are a special type of magnetic field perturbations used to control burning plasma instabilities called edge-localized modes (ELMs) in magnetic fusion devices such as tokamaks. The efficiency of RMPs for controlling ELMs was first demonstrated on the tokamak DIII-D in 2003.[1]
Normally the rippled magnetic field will only suppress ELMs for very narrow ranges of the plasma current.[2]
See also
- Plasma instability – Degree to which disturbing a plasma system at equilibrium will destabilize it
- COMPASS tokamak – Tokamak fusion energy device
- NSTX-U – US nuclear fusion reactor
References
- ^ T.E. Evans; et al. (2004). "Suppression of Large Edge-Localized Modes in High-Confinement DIII-D Plasmas with a Stochastic Magnetic Boundary" (PDF). Physical Review Letters. 92 (23) 235003. Bibcode:2004PhRvL..92w5003E. doi:10.1103/PhysRevLett.92.235003. PMID 15245164.
- ^ Fusion Power Breakthrough: New Method for Eliminating Damaging Heat Bursts in Toroidal Tokamaks
Further reading
- Kirk, A.; et al. (2013). "Effect of resonant magnetic perturbations on ELMs in connected double null plasmas in MAST". Plasma Physics and Controlled Fusion. 55 (4) 045007. arXiv:1303.0146. Bibcode:2013PPCF...55d5007K. doi:10.1088/0741-3335/55/4/045007.
- Evans, T. E. (2008). "RMP ELM suppression in DIII-D plasmas with ITER similar shapes and collisionalities". Nuclear Fusion. 48 (2) 024002. Bibcode:2008NucFu..48b4002E. doi:10.1088/0029-5515/48/2/024002RMP for ITER-like plasma triangularity is harder
{{cite journal}}: CS1 maint: postscript (link) - Connection between plasma response and RMP ELM suppression in DIII-D Wingen 2015 free access
- Wide Operational Windows of Edge-Localized Mode Suppression by Resonant Magnetic Perturbations in the DIII-D Tokamak 2020 "The model predicts that wide q95 windows of ELM suppression can be achieved at substantially higher pedestal pressure in DIII-D by shifting to higher toroidal mode number (n=4) RMPs."