Kinetic Theories of Geodesic Acoustic Modes: Radial Structure, Linear Excitation by Energetic Particles and Nonlinear Saturation

QIU Zhiyong; Fulvio ZONCA; CHEN Liu

Plasma Science and Technology > 2011 > 13(3): 257-266.

QIU Zhiyong, Fulvio ZONCA, CHEN Liu. Kinetic Theories of Geodesic Acoustic Modes: Radial Structure, Linear Excitation by Energetic Particles and Nonlinear Saturation[J]. Plasma Science and Technology, 2011, 13(3): 257-266.

Citation:

PDF (614 KB)

Kinetic Theories of Geodesic Acoustic Modes: Radial Structure, Linear Excitation by Energetic Particles and Nonlinear Saturation

1 Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou, P.R.C. 2 Associazione Euratom-ENEA sulla Fusione, C.P. 65 - I-00044 - Frascati, Italy 3 Dept. of Physics and Astronomy, Univ. of California, Irvine CA 92697-4575, U.S.A.

Funds: This work is supported by the Euratom Communities under the contract of Association between EURATOM/ENEA, USDoE GRANTS and the National Basic Research Program of China and ITER-CN under Grant No.2009GB105005. One of the authors (Z.Q.), undertook part of this work with the support of the “ICTP programme for Training and Research in Italian Laboratories, Trieste, Italy”.

More Information

Received Date: December 16, 2010
Revised Date: May 15, 2011

Graphical Abstract

Abstract

Abstract

Geodesic Acoustic Modes (GAMs) are oscillating zonal mode structures unique to toroidal plasmas and are capable of regulating microscopic turbulence and associated transports. In this paper, we investigate three important aspects of GAM dynamics: (1) GAM continuous spectrum and its mode conversion to kinetic GAM (KGAM); (2) linear excitation of energetic particle induced GAM (EGAM) and its coupling to the GAM continuum, and (3) nonlinear saturation of EGAM via wave particle trapping. The analogy between the GAM-EGAM dynamics and the well known beam-plasma instability is also discussed.
- Geodesic Acoustic Mode,
- Continuum,
- Energetic Particles,
- Wave Particle Trapping

FullText(HTML)

References (0)

[1]	Nanxuan SHEN, Zihan SU, Yuanhang ZHANG, Tiebing LU. The influence of charge characteristics of suspension droplets on the ion flow field in different temperatures and humidity[J]. Plasma Science and Technology, 2022, 24(4): 044004. DOI: 10.1088/2058-6272/ac5afb
[2]	ubao JIN (金福宝), Yuanxiang ZHOU (周远翔), Bin LIANG (梁斌), Zhongliu ZHOU (周仲柳), Ling ZHANG (张灵). Effects of temperature on creepage discharge characteristics in oil-impregnated pressboard insulation under combined AC–DC voltage[J]. Plasma Science and Technology, 2019, 21(5): 54002-054002. DOI: 10.1088/2058-6272/aaff01
[3]	Yunxiao ZHANG (张云霄), Yuanxiang ZHOU (周远翔), Ling ZHANG (张灵), Zhen LIN (林臻), Jie LIU (刘杰), Zhongliu ZHOU (周仲柳). Electrical treeing behaviors in silicone rubber under an impulse voltage considering high temperature[J]. Plasma Science and Technology, 2018, 20(5): 54012-054012. DOI: 10.1088/2058-6272/aaa88a
[4]	Siyuan DONG (董思远), Shaomeng GUO (郭少孟), Dan WEN (文旦), Xiaoliang TANG (唐晓亮), Gao QIU (邱高). Investigation on the mode of AC discharge in H₂O affected by temperature[J]. Plasma Science and Technology, 2018, 20(4): 45401-045401. DOI: 10.1088/2058-6272/aaa70b
[5]	Xiangcheng DONG (董向成), Jianhong CHEN (陈建宏), Xiufang WEI (魏秀芳), PingYUAN (袁萍). Calculating the electron temperature in the lightning channel by continuous spectrum[J]. Plasma Science and Technology, 2017, 19(12): 125304. DOI: 10.1088/2058-6272/aa8acb
[6]	Yong WANG (王勇), Cong LI (李聪), Jielin SHI (石劼霖), Xingwei WU (吴兴伟), Hongbin DING (丁洪斌). Measurement of electron density and electron temperature of a cascaded arc plasma using laser Thomson scattering compared to an optical emission spectroscopic approach[J]. Plasma Science and Technology, 2017, 19(11): 115403. DOI: 10.1088/2058-6272/aa861d
[7]	Satoshi NODOMI, Shuichi SATO, Mikio OHUCHI. Electron Temperature Measurement by Floating Probe Method Using AC Voltage[J]. Plasma Science and Technology, 2016, 18(11): 1089-1094. DOI: 10.1088/1009-0630/18/11/06
[8]	Pascal ANDRE, William BUSSIERE, Alain COULBOIS, Jean-Louis GELET, David ROCHETTE. Modelling of Electrical Conductivity of a Silver Plasma at Low Temperature[J]. Plasma Science and Technology, 2016, 18(8): 812-820. DOI: 10.1088/1009-0630/18/8/04
[9]	Panagiotis SVARNAS. Vibrational Temperature of Excited Nitrogen Molecules Detected in a 13.56 MHz Electrical Discharge by Sheath-Side Optical Emission Spectroscopy[J]. Plasma Science and Technology, 2013, 15(9): 891-895. DOI: 10.1088/1009-0630/15/9/11
[10]	WEN Xueqing (闻雪晴), XIN Yu (信裕), FENG Chunlei (冯春雷), DING Hongbin (丁洪斌). Electron Energy and the Effective Electron Temperature of Nanosecond Pulsed Argon Plasma Studied by Global Simulations Combined with Optical Emission Spectroscopic Measurements[J]. Plasma Science and Technology, 2012, 14(1): 40-47. DOI: 10.1088/1009-0630/14/1/10