Estimation of the ion toroidal rotation source due to momentum transfer from Lower Hybrid waves in Alcator C-Mod

Journal Article · Fri Dec 23 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3665015· OSTI ID:21612519

Lee, J P; Wright, J C; Bonoli, P T; Parker, R R; Catto, P J; Podpaly, Y A; Rice, J E; Reinke, M L ^[1]

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1. Plasma Science and Fusion Center, MIT, Cambridge (United States)

Significant ion toroidal rotation (50km/s) has been measured by X-Ray spectroscopy for impurities in Alcator C-Mod during lower hybrid (LH) RF power injection. We investigate the relation between the computed toroidal momentum input from LH waves and the measured INITIAL change of ion toroidal rotation when the LH power is turned on. The relation may depend on the plasma current and magnetic configuration. Because of the fast build up time of the electron quasilinear plateau (<1 millisecond), the electron distribution function rapidly reaches steady state in which the electrons transfer momentum to the ions. The LH wave momentum input is computed from the self consistent steady state electron distribution function and a bounce-averaged quasilinear diffusion coefficient that are obtained by iterating a full wave code (TORLH) with a Fokker Plank code (CQL3D)

• OSTI ID: 21612519
• Journal Information: AIP Conference Proceedings, Vol. 1406, Issue 1; Conference: 9. topical conference on radio frequency power in plasmas, Newport (United States), 1-3 Jun 2011; Other Information: DOI: 10.1063/1.3665015; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALCATOR DEVICE
DIFFUSION
DISTRIBUTION FUNCTIONS
ELECTRIC CURRENTS
ELECTROMAGNETIC RADIATION
ELECTRON TRANSFER
ELECTRONS
FOKKER-PLANCK EQUATION
IONS
LOWER HYBRID CURRENT DRIVE
LOWER HYBRID HEATING
MOMENTUM TRANSFER
PLASMA IMPURITIES
Q CODES
ROTATION
STEADY-STATE CONDITIONS
T CODES
X-RAY SPECTROSCOPY
CHARGED PARTICLES
CLOSED PLASMA DEVICES
COMPUTER CODES
CURRENTS
DIFFERENTIAL EQUATIONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FUNCTIONS
HEATING
HIGH-FREQUENCY HEATING
IMPURITIES
LEPTONS
MOTION
NON-INDUCTIVE CURRENT DRIVE
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA HEATING
RADIATIONS
SPECTROSCOPY
THERMONUCLEAR DEVICES
TOKAMAK DEVICES