Concept

Onde d'Alfvén

Publications associées (106)

New insights into the decay of ion waves to turbulence, ion heating, and soliton generation

The decay of a single-frequency, propagating ion acoustic wave (IAW) via two-ion wave decay to a continuum of IAW modes is found to result in a highly turbulent plasma, ion soliton production, and rapid ion heating. Instability growth rates, thresholds, an ...

Amer Inst Physics2014

Global gyrokinetic stability of collisionless microtearing modes in large aspect ratio tokamaks

Laurent Villard, Stephan Brunner

Linear full radius gyrokinetic calculations show the existence of unstable microtearing modes (MTMs) in purely collisionless, high temperature, large aspect ratio tokamak plasmas. The present study takes into account fully gyrokinetic highly passing ions a ...

Amer Inst Physics2014

Stability limits for tokamak plasma with negative triangularity

Olivier Sauter, Laurent Villard, Holger Reimerdes, Antoine Pochelon, Andrei Martynov

Negative triangularity tokamak plasmas are subject of an increased interest both in existing experiments and in studies of core physics as well as power handling relevant to the fusion demonstration power reactor. The ideal MHD stability calculations for t ...

European Physical Society2014

Non-diffusive suprathermal ion transport associated with blobs in TORPEX plasmas

Ambrogio Fasoli, Ivo Furno, Paolo Ricci, Fabio Avino, Kyle Gustafson, Alexandre Dominique Bovet

We present unprecedented space and time-resolved measurements of the transport of a suprathermal ion beam injected in the toroidal device TORPEX. Experiments are performed in turbulence dominated by an ideal-interchange mode using a Li6+ ion source and a s ...

2014

Transport of variable-density solute plumes in beach aquifers in response to oceanic forcing

David Andrew Barry, Alessandro Brovelli, Roham Bakhtyar, Clare Robinson

A comprehensive numerical study was undertaken to investigate transport of a variable-density, conservative solute plume in an unconfined coastal aquifer subject to high and low frequency oceanic forcing. The model combined variable-density saturated flow ...

Elsevier2013

Generation of Whistler-Wave Heated Discharges with Planar Resonant rf Networks

Christoph Hollenstein, Alan Howling, Philippe Frédérique Bruno Guittienne

Magnetized plasma discharges generated by a planar resonant rf network are investigated. A regime transition is observed above a magnetic field threshold, associated with rf waves propagating in the plasma and which present the characteristics of whistler ...

Amer Physical Soc2013

Molecular recognition using corona phase complexes made of synthetic polymers adsorbed on carbon nanotubes

Ardemis Anoush Boghossian

Understanding mol. recognition is of fundamental importance in applications such as therapeutics, chem. catalysis and sensor design. The most common recognition motifs involve biol. macromols. such as antibodies and aptamers. The key to biorecognition cons ...

2013

Kelvin waves in Lake Geneva

Ulrich Lemmin, Damien Bouffard

The passage of Kelvin waves in Lake Geneva after strong wind events was experimentally investigated in 1987 and 2002 using thermistor chains, current meters and Acoustic Doppler Current Profilers (ADCP) probing the whole water column, including the bottom ...

Elsevier Sci Ltd2013

Nanosecond Pulsed Plasma Actuators

Christoph Hollenstein, Philip Peschke

This paper summarizes the results of Plasmaero (EU project) partners on the characterization of plasma actuators based on nanosecond pulsed discharges. Results cover electrical aspects, optical discharge visualizations and measurements of the plasma-induce ...

2013

In–out impurity density asymmetry in the pedestal region of Alcator C-Mod

Christian Gabriel Theiler

Measurements are presented of the boron (B5+) density in the pedestal region at the low-field side (LFS) midplane and the high-field side (HFS) midplane of Alcator C-Mod. In H-mode plasmas, a large (>=10x) in–out asymmetry in impurity density forms, with l ...

2013

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