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Measurement of the Radial Profile of the Plasma Isotopic Composition in JET Plasmas Using Alfven Eigenmodes

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Efficient generation of energetic ions in multi-ion plasmas by radio-frequency heating

Henri Weisen, Jonathan Marc Philippe Faustin, Yu Lin

We describe a new technique for the efficient generation of high-energy ions with electromagnetic ion cyclotron waves in multi-ion plasmas. The discussed three-ion scenarios are especially suited for strong wave absorption by a very low number of resonant ...

Nature Publishing Group2017

The DTT device: Role and objectives

Holger Reimerdes

The main goal of the Divertor Tokamak Test facility (DTT), as indicated in the European Fusion Roadmap, is to explore and qualify alternative power exhaust solutions for DEMO. This paper illustrates its role and objectives. (C) 2016 EURATOM. Published by E ...

Elsevier Science Sa2017

JET experiments with tritium and deuterium-tritium mixtures

Henri Weisen, Javier García Hernández

Extensive preparations are now underway for an experiment in the Joint European Torus QET) using tritium and deuterium tritium mixtures. The goals of this experiment are described as well as the progress that has been made in developing plasma operational ...

Elsevier Science Sa2016

Multi-slit triode ion optical system with ballistic beam focusing

Alexander Karpushov, Anton Smirnov

Multi-slit triode ion-optical systems with spherical electrodes are of interest for formation of intense focused neutral beams for plasma heating. At present, two versions of focusing multi-slit triode ion optical system are developed. The first ion optica ...

Amer Inst Physics2016

ELM frequency feedback control on JET

Jonathan Graves

This paper describes the first development and implementation of a closed loop edge localized mode (ELM) frequency controller using gas injection as the actuator. The controller has been extensively used in recent experiments on JET and it has proved to wo ...

Iop Publishing Ltd2015

Digital Control System for Vertical Stability of the TCV Plasma

In advanced mode operation of fusion devices, real time control plays a central role in achieving the desired plasma performance and minimizing the risk of disruptions. With the advances in digital technologies like Digital Signal Processors (DSPs), Field ...

Universidade de Lisboa, Instituto Superior Técnico2014

Turbulent regimes in the tokamak scrape-off layer

Paolo Ricci, Joaquim Loizu Cisquella, Sébastien Jolliet, Federico David Halpern, Annamaria Mosetto

We identify the turbulent regimes in the tokamak scrape-off layer as a function of plasma resistivity, electron to ion mass ratio, safety factor, and magnetic shear. We find that two main instabilities drive turbulence in the SOL: Drift Waves, with their r ...

2013

Edge Localized Mode Control in TCV

Jonathan Rossel

The Tokamak concept, based on magnetic confinement of a hydrogen plasma, is one of today's most promising paths to energy production by nuclear fusion. The experimental scenarios leading to the largest fusion rate are based on a high confinement plasma reg ...

EPFL2012

Plasma isotopic effect on the damping rate of toroidal Alfven eigenmodes with intermediate toroidal mode numbers

Ambrogio Fasoli, Duccio Testa, Patrick Blanchard, Theodoros Panis

This paper reports on the results of recent experiments performed on the JET tokamak on toroidal Alfven eigenmodes (TAEs) with toroidal mode number (n) in the range up to vertical bar n vertical bar = 7. The stability properties of these medium-nTAEs are i ...

Int Atomic Energy Agency2012

The ITER Thomson scattering core LIDAR diagnostic

The central electron temperature and density of the ITER plasma may be determined by Thomson scattering. A LIDAR topology is proposed in order to minimize the port access required of the ITER vacuum vessel. By using a LIDAR technique, a profile of the elec ...

2012