Concept

Pulse wave

Publications associées (39)

Water wave-driven seepage in marine sediments

The action of water waves moving over a porous seabed drives a seepage flux into and out of the marine sediments. The volume of fluid exchange per wave cycle may affect the rate of contaminant transport in the sediments. In this paper, the dynamic response ...

2001

Poloidally asymmetric plasma response with ECH deposition near q=1 in TCV

Olivier Sauter, Timothy Goodman, Jean-Philippe Hogge, Antoine Pochelon

A small component of ECCD exists when heating off-axis with no toroidal injection due to the field helicity. The sign of the ECCD will change depending on the absorption location in a poloidal plane, the beam injection relative to delB(vac), and the direct ...

2001

Modelling of macroscopic magnetic islands in tokamaks

Olivier Sauter, Ivo Furno, Andrei Martynov

The article presents experimental and theoretical investigations on the dynamics of saw-teeth and neoclassical tearing modes in tokamak plasmas. The main findings of these investigations are: (1) The experimental validation, on the basis of FTU and TCV dat ...

2001

Stability and energy confinement of highly elongated plasmas in TCV

Olivier Sauter, Basil Duval, Stefano Coda, Timothy Goodman, Yves Martin, Jean-Marc Moret, Stefano Alberti, Ivo Furno, Minh Quang Tran, Patrick Blanchard, Holger Reimerdes, Jean-Philippe Hogge, René Chavan, Damien Fasel, Xavier Llobet, Pierre Lavanchy, Henri Weisen, Jonathan Bryan Lister, Richard Pitts, Antoine Pochelon, Kurt Appert, Roland Behn, Philippe Marmillod, Gilbert Tonetti, Albert Perez, Andrea Scarabosio, Blaise Marlétaz, Pierre-François Isoz, Igor Klimanov, Jean-Claude Magnin, Andrei Martynov, Petri Nikkola, Adriano Manini, Paolo Bosshard, Jean-Yves Favez, Edgar Scavino

The operating space of the TCV tokamak has been extended to higher elongation, kappa = 2.8, and higher normalized current, I-N = I-p/aB = 3.6MA/mT, than were previously attainable. This has been achieved by optimizing the parameters of the vertical positio ...

2001

Effect of triangular and elongated plasma shape on the sawtooth stability

Olivier Sauter, Timothy Goodman, Holger Reimerdes, Antoine Pochelon, Andrei Martynov

In the TCV tokamak the sawtooth period and the sawtooth amplitude are observed to depend strongly on the shape of the poloidal plasma cross section. Systematic scans of plasma elongation and triangularity show small sawteeth with short periods at high elon ...

2000

The structure of predictable discrete-time cyclostationary processes

Giancarlo Ferrari Trecate

The Wold decomposition of discrete-time CS (cyclostationary) processes into regular and predictable component is considered. Using the properties of the zeros of linear periodic systems it is shown that the predictable component consists of a linear combin ...

1998

Fourier spectrum of curvilinear gratings of the second order

Isaac Amidror

The class of second-order curvilinear gratings consists of all the curvilinear gratings that are obtained by second-order spatial transformations of periodic gratings. It includes, for example, circular, elliptic, and hyperbolic gratings as well as circula ...

Opt. Soc. America1998

Developing a Multigrid Solver for Standing Wave Equation

Viktor Kuncak

In this paper multigrid technique is adapted for solving standing one-dimensional wave equation with radiation boundary conditions. Solver, consisting of wave cycle and ray cycle, uses Gauss-Seidel and Kaczmarz relaxation sweeps and is aimed to work effici ...

1996

Electron-Cyclotron Resonance Heating on the Tca Tokamak

Timothy Goodman, Minh Quang Tran, Antoine Pochelon, Roland Behn

Electron cyclotron resonance heating (ECRH) experiments at 39 GHz with power levels similar to those of Ohmic heating have been conducted in the TCA tokamak, in either the X-mode or the O-mode. ECRH was observed to be more efficiently absorbed in low densi ...

1993

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