Analytical collisionless damping rate of geodesic acoustic mode

Ren, H.; Xu, X. Q.

doi:10.1088/0029-5515/56/10/106008

Analytical collisionless damping rate of geodesic acoustic mode

Journal Article · Tue Aug 09 00:00:00 EDT 2016 · Nuclear Fusion

DOI:https://doi.org/10.1088/0029-5515/56/10/106008· OSTI ID:1566007

Ren, H. ^[1]; Xu, X. Q. ^[2]

Univ. of Science and Technology of China, Hefei (People's Republic of China)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Collisionless damping of geodesic acoustic mode (GAM) is analytically investigated by considering the finite-orbit-width (FOW) resonance effect to the 3rd order in the gyro-kinetic equations. Here, a concise and transparent expression for the damping rate is presented for the first time. Good agreement is found between the analytical damping rate and the previous TEMPEST simulation result (Xu 2008 et al Phys. Rev. Lett. 100 215001) for systematic q scans. Our result also shows that it is of sufficient accuracy and has to take into account the FOW effect to the 3rd order.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1566007

Report Number(s):: LLNL-JRNL--690159; 818069

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 10 Vol. 56; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Electromagnetic effect on geodesic acoustic mode with adiabatic electrons Huang, Wenlong; Ren, Haijun; Xu, X. Q. Physics of Plasmas, Vol. 26, Issue 2 https://doi.org/10.1063/1.5080271	journal	February 2019

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