| Autor: |
Di Siena, Alessandro, Navarro, Alejandro Banon, Jenko, Frank |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Lett. 125, 105002 (2020) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.125.105002 |
| Popis: |
Turbulent transport is known to limit the plasma confinement of present-day optimized stellarators. To address this issue, a novel method to strongly suppress turbulence in such devices is proposed, namely the resonant wave-particle interaction of supra-thermal particles - e.g., from ion-cyclotron-resonance-frequency (ICRF) heating - with turbulence-driving microinstabilities like ion-temperature-gradient (ITG) modes. The effectiveness of this mechanism is demonstrated via analytic theory and large-scale gyrokinetic simulations, revealing an overall turbulence reduction by up to $80\%$. These results hold the promise of new and still unexplored stellarator scenarios with enhanced confinement and improved performance, essential for achieving burning plasmas in future devices. |
| Databáze: |
arXiv |
| Externí odkaz: |
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