Progress in LHCD modeling and experiments towards the AT regime on Alcator C-Mod

Journal Article · Fri Dec 23 04:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3665010· OSTI ID:21612514

Shiraiwa, S; Bonoli, P T; Faust, I; Meneghini, O; Hubbard, A; Parker, R R; Schmidt, A E; Wallace, G M; Hughes, J W; Mumgaard, R ^[1]; Scott, S; Wilson, J R ^[2]; Harvey, R W; Smirnov, A P ^[3]

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1. MIT Plasma Science and Fusion Center, Cambridge, MA (United States)
2. Princeton Plasma Physics Laboratory, Princeton, NJ USA (United States)
3. CompX, Del Mar, CA (United States)

Electron internal transport barrier (ITB) formation is observed during fully non-inductive LHCD discharges on Alcator C-Mod. The formation is characterized by an abrupt increase of the central electron temperature after a few current penetration time has passed following LHCD turn-on. The ITB phase is often terminated by m = 2 mode activity. Kinetic equilibrium reconstruction and TRANSP/LSC analysis show shear reversal in the q profile during the ITB phase. TRANSP/LSC predictive analysis suggests that f{sub Bs}{approx}60% is possible if a similar temperature gradient is maintained at r/a{approx}0.5 with H-factor of 1.

• OSTI ID: 21612514
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1406; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALCATOR DEVICE
CHARGED-PARTICLE TRANSPORT
CLOSED PLASMA DEVICES
COMPUTERIZED SIMULATION
CURRENTS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELECTRIC POTENTIAL
ELECTRON TEMPERATURE
ELECTRONS
ELEMENTARY PARTICLES
EQUILIBRIUM
FERMIONS
LEPTONS
LOWER HYBRID CURRENT DRIVE
NON-INDUCTIVE CURRENT DRIVE
PLASMA
PLASMA SIMULATION
RADIATION TRANSPORT
SIMULATION
TEMPERATURE GRADIENTS
THERMAL BARRIERS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES