1 / 4

Fast Ions Impact on Plasma Turbulence and MHD in Jet Hybrid Scenarios

This study analyzes the significant role of fast ions in hybrid scenarios of JT-60U and JET shots, with a focus on their impact on plasma pressure, turbulence, and MHD stability. The GENE gyrokinetic code and MISHKA ISM analysis are used to explore the effects of fast ions on equilibrium, turbulence reduction, and improved confinement. By studying the interaction between turbulence and MHD through fast ions, higher confinement in low-density hybrids is achieved. Further analysis will extend to additional JET and JT-60U shots and ITER hybrid scenarios.

angelina
Download Presentation

Fast Ions Impact on Plasma Turbulence and MHD in Jet Hybrid Scenarios

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Role of fast ions on jet hybrid scenarios J. Garcia, J. Citrin, P. Maget 15 March 2013 CEA | 10 AVRIL 2012

  2. JT-60U and JET: Fast ions • Fast ions contribution to the total pressure is very important for hybrid scenarios in JT-60U and in some JET shots. Can reach up from 35% up to 45% of the total pressure • Analysis of the impact is carried out in the core (turbulence) and in the edge (MHD) • GENE gyrokinetik code used for analyzing electromagnetic turbulence (necessary because of high beta) • Peeling ballooning MHD ideal analysis performed with MISHKA ISM Garching 15 March2013

  3. Equilibrium is calculated with interpretative analysis done with CRONOS. With and without fast ions • This equilibrium is calculated for turbulence and MHD analysis • Equilibrium is highly modified by fast ions with a high impact on Shafranov-shift • βN,total(75225)=2.9, βN,thermal(75225)=2.15, βN,total(48158)=2.6, βN,thermal(48158)=1.8 ISM Garching 15 March2013

  4. The peeling ballooning diagram is modified by the fast ions. This allows for higher pedestal pressure due to Shafranov shift • Turbulence analysis performed at r=0.33 • ITG modes highly reduced due to the fast ions • Improvement confinement obtained from the edge and the core due to the strong modification of plasma geometry due to fast ions • Interaction between turbulence and MHD through fast ions allow higher confinement in low density hybrids • The same analysis will be carried out for more JET and JT-60U shots and ITER hybrid ISM Garching 15 March2013

More Related