scholarly journals Transport equations in magnetized plasmas for non-Maxwellian distribution functions

2018 ◽  
Vol 25 (10) ◽  
pp. 102308 ◽  
Author(s):  
D. S. Oliveira ◽  
R. M. O. Galvão
Keyword(s):  
Transport Equations ◽  
Distribution Functions ◽  
Maxwellian Distribution ◽  
Magnetized Plasmas

scholarly journals Measuring heat flux from collective Thomson scattering with non-Maxwellian distribution functions

2019 ◽  
Vol 26 (3) ◽  
pp. 032104 ◽  
Author(s):  
R. J. Henchen ◽  
M. Sherlock ◽  
W. Rozmus ◽  
J. Katz ◽  
P. E. Masson-Laborde ◽  
...  
Keyword(s):  
Heat Flux ◽  
Thomson Scattering ◽  
Distribution Functions ◽  
Maxwellian Distribution ◽  
Collective Thomson Scattering

Effects of Landau Damping and Collision on Stimulated Raman Scattering with Various Phase-Space Distributions

2021 ◽  
Author(s):  
Shanxiu XIE ◽  
Yong CHEN ◽  
Junchen YE ◽  
Yugu CHEN ◽  
Na PENG ◽  
...  
Keyword(s):  
Growth Rate ◽  
Raman Scattering ◽  
Stimulated Raman Scattering ◽  
Deep Understanding ◽  
Distribution Functions ◽  
Maxwellian Distribution ◽  
Landau Damping ◽  
Hot Electron ◽  
Collisional Damping ◽  
Stimulated Raman

Abstract Stimulated Raman scattering (SRS) is one of the main instabilities affecting the success of the fusion ignition. Here, we study the relationship between Raman growth and Landau damping with various distribution functions combining the analytic formulas and Vlasov simulations. The Landau damping obtained by Vlasov-Poisson simulation and Raman growth rate obtained by Vlasov-Maxwell simulation are anti-correlated, which is consistent with our theoretical analysis quantitatively. Maxwellian distribution, flattened distribution, and bi-Maxwellian distribution are studied in detail, which represent three typical stages of SRS. We have also demonstrated the effects of plateau width, hot-electron fraction, hot-to-cold electron temperature ratio, and collisional damping on the Landau damping and growth rate. It gives us a deep understanding of SRS and possible ways to mitigate SRS through manipulating distribution functions to a high Landau damping regime.

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