Publications by Petri Nikkola | EPFL Graph Search

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Anomalous electron transport is determined by turbulence, which in turn is affected by magnetic shear. A novel application of electron cyclotron current drive (ECCD), aiming at localized shear modulation, has been applied on the TCV tokamak for experiments ...

Space charge effects (so-called negative-mass instability) as the reason for electron energy spread developing in the region of the electron drift between the cathode and the cavity of a gyrotron are discussed. The quasioptical gyrotron working at third harmonic that is developed at Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Federale de Lausanne, is used to demonstrate the expected efficiency degradation.

Improved electron energy confinement in tokamak plasmas, related to internal transport barriers, has been linked to nonmonotonic current density profiles. This is difficult to prove experimentally since usually the current profiles evolve continuously and ...

Important ingredients of the advanced-tokamak route to fusion have been explored in depth in the Tokamak a Configuration Variable [F. Hofmann, J. B. Lister, M. Anton , Plasma Phys. Controlled Fusion 36, B277 (1994)] over the past two years. Using a uniquel ...

Petri Nikkola

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Shear modulation experiments with ECCD on TCV

Space charge effects as a source of electron energy spread and efficiency degradation in gyrotrons

Inductive current density perturbations to probe electron internal transport barriers in tokamaks

High-bootstrap, noninductively sustained electron internal transport barriers in the Tokamak a Configuration Variable

The physics performance of the front steering launcher for the ITER ECRH upper port

Physics of steady-state electron internal transport barriers on TCV

The front steering launcher design for the ITER ECRH upper port

Control of the eITB formation and performance in fully non-inductively sustained ECCD discharges in TCV

Radial transport and electron cyclotron current drive in the TCV and DIII-D tokamaks

Unfolding the dynamics of Suprathermal Electrons: Experimental and Numerical Tools on the TCV Tokamak

Current profile tailoring with far off-axis ECH power deposition in TCV elongation experiments

A comparison of weakly and fully relativistic electron cyclotron wave damping in the presence of high energy electrons

ECCD and Bootstrap Current Profiles in Advanced Scenario Plasmas in TCV

Electron cyclotron current drive and suprathermal electron dynamics in the TCV tokamak

Shape effects on sawtooth/internal kink stability and confinement with EC waves in the TCV tokamak

Fully off-axis ECCD driven plasmas in TCV (Invited paper)

Numerical and experimental studies of electron cyclotron current drive efficiency in plasmas with nearly zero ohmic current

Formation of eITBs in EC-heated TCV plasmas with and without inductively driven current component

Simulation of hard X-ray spectra of TCV EDRH/ECCD experiments

Electron ITB in Fully Non-Inductive Reverse Shear Scenarios