24th IAEA Fusion Energy Conference - IAEA CN-197

Session

Transport

EX/TH

9 Oct 2012, 16:40

Conveners

Transport: EX/2 & TH/1

• Myeun Kwon (Republic of Korea)

502. EX/2-1: Connections Between Intrinsic Toroidal Rotation, Density Peaking and Plasma Turbulence Regimes in ASDEX Upgrade

Ms Rachael McDermott (Germany)

09/10/2012, 16:40

EXC - Magnetic Confinement Experiments: Confinement

Oral Presentation

Recently, ASDEX Upgrade has made significant contributions to momentum transport studies thanks to the upgrade of the core charge exchange recombination spectroscopy system, which now produces much higher quality ion temperature and toroidal rotation profiles. This upgrade enabled the development of an intrinsic rotation database that contains over 200 observations. The edge rotation on AUG is...

59. EX/2-2: A Unified Explanation of Rotation Reversals, Confinement Saturation and Non-Diffusive Heat Transport in C-Mod Ohmic Plasmas

Mr John Rice (USA)

09/10/2012, 17:00

EXC - Magnetic Confinement Experiments: Confinement

Oral Presentation

Recently, the connection among rotation reversals, energy confinement saturation (the transition between the LOC and saturated Ohmic confinement, SOC, regimes) and changes in underlying turbulence has been demonstrated. Examination of the rotation reversal results and a large body of confinement saturation observations suggests that there is a critical value of the collisionality where these...

466. TH/1-1: Study of Toroidal Flow Generation by the ICRF Minority Heating in the Alcator C-Mod Plasma

Mr Sadayoshi Murakami (Japan)

09/10/2012, 17:20

THW - Magnetic Confinement Theory and Modelling: Wave–plasma interactions; current drive; heating; energetic particles

Oral Presentation

Important role of the plasma flow and its shear in the transport improvement is suggested by many experimental observations. The spontaneous toroidal flow has been observed during ICRF heating with no direct momentum input in many devices. Especially, in the Alcator C-Mod plasma, the spontaneous toroidal flow and ITB formation have been investigated intensively in the ICRF heating plasma and...

461. EX/2-3: ECRH Effects on Toroidal Rotation: KSTAR Experiments and Gyrokinetic Simulations of Intrinsic Torque at ITG - TEM Transitions

Mr Yuejiang SHI (Republic of Korea)

09/10/2012, 17:40

EXC - Magnetic Confinement Experiments: Confinement

Oral Presentation

Toroidal rotation is important for control of stability and transport in tokamaks. Intrinsic rotation is self-generated by ambient turbulence via the non-diffusive residual stress, which motivates the question of how macroscopic rotation profiles will evolve in response to changes in the ambient micro-turbulence. One ‘control knob’ for the micro-turbulence population is the heating mix of NBI...

188. EX/2-4: Dependence of Heat Transport and Confinement on Isotopic Composition in Conventional H-mode Plasmas in JT-60U

Mr Hajime Urano (Japan)

09/10/2012, 18:00

EXC - Magnetic Confinement Experiments: Confinement

Oral Presentation

Dependence of heat transport on isotopic composition is investigated in conventional H-mode plasmas for the application to ITER. The identical profiles of electron density, electron temperature and ion temperature are obtained for hydrogen and deuterium plasmas while the required power becomes clearly larger for hydrogen, resulting in the reduction of the heat diffusivity for deuterium. The...

468. EX/2-5: Extension of Operational Regime in High-Temperature Plasmas and the Dynamic-Transport Characteristics in the LHD

Mr Hiromi Takahashi (Japan)

09/10/2012, 18:20

EXC - Magnetic Confinement Experiments: Confinement

Oral Presentation

Realization of high-T_i plasmas is one of the most important issues in helical plasmas, which have an advantage for steady-state operation comparison with tokamak plasmas. Since 2010, newly installed perpendicular-NBI with the beam energy of 40 keV has been operational in the Large Helical Device (LHD) and the total-heating power of perpendicular-NBIs increased from 6 MW to 12 MW. Such...