Publications by Alexander Karpushov

Overview of the FTU results

Olivier Sauter, Basil Duval, Duccio Testa, Holger Reimerdes, Alexander Karpushov, Cristian Galperti, Gabriele Grosso, Doohyun Kim, Dávid Wágner, Lucia Isabel Federspiel, Jonathan Rossel, Donghyun Kim

Since the 2012 IAEA-FEC Conference, FTU operations have been largely devoted to runaway electrons generation and control, to the exploitation of the 140 GHz electron cyclotron (EC) system and to liquid metal limiter elements. Experiments on runaway electro ...

Iop Publishing Ltd2015

Supply equipment to the new NBH system for the TCV tokamak

Alexander Karpushov, Damien Fasel, Ugo Siravo, Jérémie Dubray, Albert Perez

The TCV tokamak is equipped with a high power real time-controllable Electron Cyclotron Heating (ECH) system, made of 9 gyrotrons capable of 500 kW RF power. One of the major scientific challenge, the TCV upgrades aimed to, will be the access to a wider ra ...

Elsevier Science2015

Upgrade of the TCV tokamak, first phase: neutral beam heating system

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Timothy Goodman, Yves Martin, Stefano Alberti, René Chavan, Alexander Karpushov, Damien Fasel, Matthieu Toussaint

Experiments on TCV are designed to complement the work at large integrated tokamak facilities (such as JET) to provide a stepwise approach to extrapolation to ITER and DEMO in areas where medium-size tokamaks can often exploit their experimental capabiliti ...

2015

Upgrade of the TCV tokamak, first phase: Neutral beam heating system

Olivier Sauter, Ambrogio Fasoli, Basil Duval, Timothy Goodman, Yves Martin, Stefano Alberti, René Chavan, Alexander Karpushov, Damien Fasel, Matthieu Toussaint

Elsevier Science Sa2015

Threshold power for the transition into H-mode for H, D, and He plasmas in TCV

Basil Duval, Yves Martin, Benoît Labit, Laurie Porte, Alexander Karpushov, Roland Behn

The threshold power for the transition into H-mode with hydrogen (H), deuterium (D), and helium (He) as majority ion species has been evaluated from a series of dedicated experiments on the tokamak TCV. Identical plasma configurations with a single-null X- ...

Iop Publishing Ltd2015

X-point Position Dependence of Edge Intrinsic Toroidal Rotation on TCV

Olivier Sauter, Basil Duval, Holger Reimerdes, Benoît Labit, Alexander Karpushov, Wouter Vijvers

Recent theoretical work predicts intrinsic toroidal rotation in the tokamak edge to depend strongly on the normalized major radial position of the X-point. With this motivation, we conducted a series of Ohmic L-mode shots on the Tokamak a Configuration Var ...

American Institute of Physics2015

Effects of central electron cyclotron power on plasma rotation and on triggerless onset of NTMs in the TCV tokamak

Olivier Sauter, Basil Duval, Duccio Testa, Holger Reimerdes, Alexander Karpushov, Doohyun Kim, Dávid Wágner, Lucia Isabel Federspiel, Jonathan Rossel, Donghyun Kim

Experiments on the TCV tokamak show that high power central electron cyclotron heating (ECH) and current drive (ECCD) produce significant direct modification of the plasma rotation profile, as well as the effect on the equilibrium current density. These ef ...

Iop Publishing Ltd2015

High density experiments in TCV ohmically heated and L-mode plasmas

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Benoît Labit, Laurie Porte, Alexander Karpushov, Antoine Pochelon, Roland Behn

Recent experiments have been performed on the Tokamak a configuration variable (TCV) to investigate the confinement properties of high density plasmas and the mechanism behind the density limit. In a limiter configuration with plasma elongation kappa = 1.3 ...

Iop Publishing Ltd2015

X-Point-Position-Dependent Intrinsic Toroidal Rotation in the Edge of TCV

Olivier Sauter, Basil Duval, Holger Reimerdes, Benoît Labit, Alexander Karpushov, Yann Camenen, Wouter Vijvers

Edge intrinsic rotation was investigated in Ohmic L-mode discharges on the Tokamak a Configuration Variable, scanning the major radial position of the X point, R-X. Edge rotation decreased linearly with increasing RX, vanishing or becoming countercurrent f ...

American Physical Society2015

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Alexander Karpushov

Overview of the FTU results

Supply equipment to the new NBH system for the TCV tokamak

Upgrade of the TCV tokamak, first phase: neutral beam heating system

Upgrade of the TCV tokamak, first phase: Neutral beam heating system

Threshold power for the transition into H-mode for H, D, and He plasmas in TCV

X-point Position Dependence of Edge Intrinsic Toroidal Rotation on TCV

Effects of central electron cyclotron power on plasma rotation and on triggerless onset of NTMs in the TCV tokamak

High density experiments in TCV ohmically heated and L-mode plasmas

X-Point-Position-Dependent Intrinsic Toroidal Rotation in the Edge of TCV

On the non-stiffness of edge transport in L-mode tokamak plasmas

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Supply equipment to the new NBH system for the TCV tokamak

On the non-stiffness of edge transport in L-mode tokamak plasmas

Upgrade of the TCV tokamak, first phase: Neutral beam heating system

X-point Position Dependence of Edge Intrinsic Toroidal Rotation on TCV

Effects of central electron cyclotron power on plasma rotation and on triggerless onset of NTMs in the TCV tokamak

X-Point-Position-Dependent Intrinsic Toroidal Rotation in the Edge of TCV

High density experiments in TCV ohmically heated and L-mode plasmas

Threshold power for the transition into H-mode for H, D, and He plasmas in TCV

Overview of the FTU results

Upgrade of the TCV tokamak, first phase: neutral beam heating system