Electron cyclotron resonance heating (ECRH) of high-density tokamak plasmas is limited because of reflections of the waves at so-called wave cutoffs. Electron Bernstein wave (EBW) heating (EBWH) via a double mode conversion process from ordinary (O)-mode, ...

American Nuclear Society2007

Plasma shape stabilization of current rise MHD instabilities in TCV

Yves Martin, Antoine Pochelon, Andrea Scarabosio

The well-known and potentially disruptive plasma 'current rise' instabilities are studied as a function of the plasma shape in the Tokamak a a Configuration Variable (TCV). Disruptions typically occur in quasi-circular plasmas at q(a) - 3 in both non-sawto ...

2007

Bulk Plasma Rotation in the TCV Tokamak in the Absence of External Momentum Input

Basil Duval, Richard Pitts, Antoine Pochelon, Andrea Scarabosio, Alexander Karpushov, Alessandro Bortolon

2007

Impact of plasma triangularity and collisionality on electron heat transport in TCV L-mode plasmas

Roland Behn, Antoine Pochelon, Olivier Sauter, Stefano Coda, Alberto Bottino, Alexander Karpushov, Yann Camenen, Alessandro Bortolon

The impact of plasma shaping on electron heat transport is investigated in TCV L-mode plasmas. The study is motivated by the observation of an increase in the energy confinement time with decreasing plasma triangularity which may not be explained by a chan ...

IOP Publishing Ltd2007

Gyrokinetic simulations of shaping effects on turbulent heat and particle transport observed on the TCV tokamak

Stephan Brunner, Antoine Pochelon, Olivier Sauter, Laurent Villard, Yann Camenen, Alessandro Marinoni, Xavier Lapillonne

2007

Current profile tailoring using localized electron cyclotron heating in highly elongated TCV plasmas

Gilles Arnoux, Patrick Blanchard, Stefano Alberti, Timothy Goodman, Antoine Pochelon, Olivier Sauter, Stefano Coda, Andrea Scarabosio, Laurie Porte, Yann Camenen

Radially localized electron cyclotron heating (ECH) at the 2nd harmonic (X2) is used to tailor the current profile through the modification of the temperature, and hence conductivity, profiles. The optimal conditions for current profile broadening are inve ...

IOP Publishing Ltd2007

Toroidal momentum transport in limited and diverted TCV Ohmic plasmas

Basil Duval, Antoine Pochelon, Andrea Scarabosio, Alexander Karpushov, Alessandro Bortolon

2007

Gyrokinetic simulations of shaping effects on turbulent heat and particle transport

Stephan Brunner, Antoine Pochelon, Olivier Sauter, Laurent Villard, Yann Camenen, Alessandro Marinoni, Xavier Lapillonne

2007

Optimizing Central Electron Bernstein Wave Deposition via O-X-B Double Mode Conversion in the TCV Tokamak

Roland Behn, Timothy Goodman, Jean-Marc Moret, Antoine Pochelon, Stefano Coda, Laurie Porte, Loïc Curchod, Ilya Pavlov

2007

Sawtooth behaviour in highly elongated TCV plasmas

Antoine Pochelon, Olivier Sauter, Ivo Furno, Holger Reimerdes, Andrei Martynov

The effect of plasma elongation kappa on the sawtooth behaviour is studied in ohmically heated TCV plasmas up to values of kappa = 2.8. Above a certain value of kappa, which varies from 2.2 to 2.6 and depends on the current profile, the sawtooth oscillatio ...

2006

Impact of Plasma Shaping on Electron Heat Transport in TCV L-mode Plasmas at Various Collisionalities

Roland Behn, Antoine Pochelon, Olivier Sauter, Stefano Coda, Alberto Bottino, Alexander Karpushov, Yann Camenen, Alessandro Bortolon

2006

Inter-Machine Comparison of Intrinsic Toroidal Rotation

Antoine Pochelon, Andrea Scarabosio, Alessandro Bortolon

2006

Oscillations of Electron Temperature and Their Interplay with MHD in the Presence of Internal Transport Barriers on TCV

Timothy Goodman, Antoine Pochelon, Olivier Sauter, Henri Weisen, Stefano Coda, Igor Klimanov, Emiliano Fable

2006

Electron Bernstein Wave Heating and Emission in the TCV Tokamak

Timothy Goodman, Antoine Pochelon, Stefano Coda, Laurie Porte, Loïc Curchod, Yann Camenen

2006

Comparison of MHD-mode and Plasma Rotation Frequencies in TCV Ohmic and ECH Discharges

Basil Duval, Antoine Pochelon, Andrea Scarabosio, Alessandro Bortolon

2006

Toroidal plasma rotation in the TCV tokamak

Basil Duval, Antoine Pochelon, Andrea Scarabosio, Alexander Karpushov, Alessandro Bortolon

The first toroidal rotation measurements in TCV ohmic L-mode plasmas with no external momentum injection are presented. The toroidal velocity profile of the fully stripped carbon species is measured by active Charge eXchange Recombination Spectroscopy with ...

2006

Observation of Spontaneous Toroidal Rotation Inversion in Ohmically Heated Tokamak Plasmas

Basil Duval, Antoine Pochelon, Andrea Scarabosio, Alessandro Bortolon

Bulk plasma toroidal rotation is observed to invert spontaneously from counter to cocurrent direction in TCV (Tokamak à Configuration Variable) Ohmically heated discharges, in low confinement mode, without momentum input. The inversion occurs in high curre ...

American Physical Society2006

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