Events During the Week of April 14th through April 21st, 2024
Monday, April 15th, 2024
- “Continuum gyrokinetic study of high-field mirror fusion plasmas”
- Time: 12:00 pm - 1:15 pm
- Place: 1227 Engineering Hall
- Speaker: Manaure Francisquez, PPPL
- Abstract:
High-temperature superconducting (HTS) magnetic mirrors exploit strong fields with high mirror ratio to compress loss cones and enhance confinement, and may result in cheaper, more compact fusion power plants. Yet these devices may exhibit interchange instabilities, which can be studied with gyrokinetics given the strong magnetization and prevalence of kinetic effects. In this work [1] we aim to (a) determine if oft-used gyrokinetic models for open field lines produce the electron-confining (Pastukhov) electrostatic potential and (b) examine and address challenges faced by gyrokinetic codes in studying HTS mirrors. We show that a one-dimensional limit of said models self-consistently develops a potential qualitatively approaching the analytical Pastukhov level. Additionally, we describe the computational challenges of studying high mirror ratios with open field line gyrokinetic 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 will be discussed.
[1] M. Francisquez, et al. Phys. Plasmas 30, 102504 (2023) - Host: Prof. Cary Forest and Prof. Carl Sovinec
Tuesday, April 16th, 2024
- No events scheduled
Wednesday, April 17th, 2024
- No events scheduled
Thursday, April 18th, 2024
- No events scheduled
Friday, April 19th, 2024
- No events scheduled