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CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-8722
DTSTART:20240415T170000Z
DTEND:20240415T181500Z
DTSTAMP:20260413T223331Z
LAST-MODIFIED:20240411T185002Z
LOCATION:1227 Engineering Hall
SUMMARY:“Continuum gyrokinetic study of high-field mirror fusion pla
 smas”\, Plasma Physics (Physics/ECE/NE 922) Seminar\, Manaure Franci
 squez\, PPPL
DESCRIPTION:<br>
\nHigh-temperature superconducting (HTS) magnetic mir
 rors exploit strong fields with high mirror ratio to compress loss con
 es and enhance confinement\, and may result in cheaper\, more compact 
 fusion power plants. Yet these devices may exhibit interchange instabi
 lities\, which can be studied with gyrokinetics given the strong magne
 tization and prevalence of kinetic effects. In this work [1] we aim to
  (a) determine if oft-used gyrokinetic models for open field lines pro
 duce the electron-confining (Pastukhov) electrostatic potential and (b
 ) examine and address challenges faced by gyrokinetic codes in studyin
 g HTS mirrors. We show that a one-dimensional limit of said models sel
 f-consistently develops a potential qualitatively approaching the anal
 ytical Pastukhov level. Additionally\, we describe the computational c
 hallenges of studying high mirror ratios with open field line gyrokine
 tic solvers and offer a method to mitigate small time steps needed for
  time integration in colossal magnetic field gradients produced by HTS
  coils\, providing a 19X speedup. Additional algorithmic solutions wil
 l be discussed.<br>
\n <br>
\n[1] M. Francisquez\, et al. Phys. Plasma
 s 30\, 102504 (2023) https://doi.org/10.1063/5.0152440<br>
\n <br>
URL:https://www.physics.wisc.edu/events/?id=8722
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