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DTSTAMP:20210916T132451Z
LOCATION:Lise Girardin
DTSTART;TZID=Europe/Stockholm:20210707T123000
DTEND;TZID=Europe/Stockholm:20210707T130000
UID:submissions.pasc-conference.org_PASC21_sess145_msa177@linklings.com
SUMMARY:A Gyrokinetic Moment-Based Method for the Periphery Plasmas of Fus
 ion Devices
DESCRIPTION:Minisymposium\n\nA Gyrokinetic Moment-Based Method for the Per
 iphery Plasmas of Fusion Devices\n\nFrei, Jorge, Ricci\n\nUnderstanding th
 e turbulent dynamics of the plasma boundary of fusion devices - the region
  close to the material walls, which includes the edge, the external part o
 f the closed flux surface region, and the scrape-off layer, where the magn
 etic field lines intercept the machine vessel - is of crucial importance o
 n the way to fusion energy and a critical issue to make reliable predictio
 ns of the performances of future experiments, such as ITER. Analytical pro
 gress and numerical simulations of the plasma boundary is made particularl
 y challenging because of the multiscale and multiphysics nature of this re
 gion. In fact, the particle mean-free-path can be of the order of the mach
 ine size in the edge region due to low plasma collisionality, while plasma
  is most often collisional in the scrape-off layer. Gyrokinetic simulation
 s can be successfully applied to determine the turbulent plasma dynamics i
 n the collisionless regime, while fluid simulations have been used to simu
 late the dynamics of collisional plasmas. Bridging the gap between gyrokin
 etic and fluid simulations is therefore particularly important to simulate
  the plasma boundary. In this talk, a novel moment-based method is present
 ed to approach the simulation of the plasma boundary. The method we presen
 t offers a numerical framework capable of going beyond the fluid limits an
 d recovering the kinetic results of gyrokinetic models over a wide range o
 f plasma parameters. Linear studies, numerical challenges, and first nonli
 near applications are presented and discussed.\n\nDomain: CS and Math, Phy
 sics
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