Gyrokinetic particle simulations of the effects of compressional magnetic perturbations on drift-Alfvenic instabilities in tokamaks

Dong, Ge; Bao, Jian; Bhattacharjee, Amitava; Brizard, Alain; Lin, Zhihong; Porazik, Peter

doi:10.1063/1.4997788

Gyrokinetic particle simulations of the effects of compressional magnetic perturbations on drift-Alfvenic instabilities in tokamaks

Journal Article · Thu Aug 10 00:00:00 EDT 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4997788· OSTI ID:1398344

Dong, Ge ^[1]; Bao, Jian ^[2]; Bhattacharjee, Amitava ^[1]; ^[3]; ^[2]; Porazik, Peter ^[1]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States). Dept. of Astrophysical Sciences
Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
Saint Michael's College, Colchester, VT (United States). Dept. of Physics

The compressional component of magnetic perturbation δB-_|| to can play an important role in drift-Alfvenic instabilities in tokamaks, especially as the plasma β increases (β is the ratio of kinetic pressure to magnetic pressure). In this work, we have formulated a gyrokinetic particle simulation model incorporating δB-_||, and verified the model in kinetic Alfven wave simulations using the Gyrokinetic Toroidal Code in slab geometry. Simulations of drift-Alfvenic instabilities in tokamak geometry shows that the kinetic ballooning mode (KBM) growth rate decreases more than 20% when δB-_|| is neglected for β_e = 0.02, and that δB-_|| to has stabilizing effects on the ion temperature gradient instability, but negligible effects on the collisionless trapped electron mode. Lastly, the KBM growth rate decreases about 15% when equilibrium current is neglected.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)

Grant/Contract Number:: AC02-09CH11466; FG02-07ER46372; SC0014032

OSTI ID:: 1398344

Alternate ID(s):: OSTI ID: 1374674

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 24; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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