Concept

Direct energy conversion

Related publications (40)

High temperature superconductors for the ITER magnet system and beyond

The use of high temperature superconductor (HTS) materials in future fusion machines could increase the efficiency drastically, but strong boundary conditions exist. To outline the prospects, challenges and problems, first the benefit of using HTS material ...

2005

Three-dimensional full-wave propagation code for cold plasma

Laurent Villard, Wilfred Anthony Cooper

Electromagnetic wave propagation in the Alfven frequency range in two-dimensional (2-D) and three-dimensional (3-D) plasma configurations is investigated by using a recently developed full-wave code, LEMan. The code solves the Maxwell equation globally in ...

2004

Confinement characteristics of the quasi-axisymmetric stellarator CHS-qa

Wilfred Anthony Cooper

A low aspect ratio stellarator CHS-qa with a quasi-axisymmetric configuration has been designed at NIFS, whose main objective is the experimental study of confinement improvement. The high beta equilibrium was obtained with the HINT code which does not req ...

2004

ITER-relevant H-mode physics at ASDEX upgrade

Yves Martin, Jonathan Bryan Lister

A variety of techniques are being tested on ASDEX Upgrade for avoiding or reducing the divertor energy load caused by ELMs. Quiescent H-mode operation has been improved by operation with recently boronized vessel walls. Z(eff) values in QH-modes are now si ...

2004

Application of ICRF waves in tokamaks beyond heating

Olivier Sauter

Interaction of waves in the ion cyclotron range of frequencies (ICRF) with a plasma has a number of key properties that make them attractive beyond pure heating. First, the waves can interact resonantly with either the plasma ions or electrons. In the case ...

2003

The design of an ECRH system for JET-EP

Timothy Goodman, Stefano Alberti, Hartmut Zohm

An electron cyclotron resonance heating (ECRH) system has been designed for JET in the framework of the JET enhanced performance project (JET-EP) under the European fusion development agreement. Due to financial constraints it has been decided not to imple ...

2003

Development of a 140-GHz 1-MW continuous wave gyrotron for the W7-X stellarator

Stefano Alberti, Minh Quang Tran, Jean-Philippe Hogge

The development of high-power gyrotrons (118 GHz, 140 GHz) in continuous-wave (CW) operation for heating nuclear fusion plasmas has been in progress for several years in a joint collaboration between different European research institutes and industrial pa ...

2002

European high-power CW gyrotron development for ECRH systems

Stefano Alberti, Minh Quang Tran, Dávid Wágner

The development of high power CW gyrotrons for ECRH heating of fusion relevant plasmas has been in progress for several years in a joint collaboration between different European research institutes and an industrial partner. Two development are on going, a ...

2001

Particle-in-cell (PIC) simulations of beam instabilities in gyrotrons

Stefano Alberti, Kurt Appert, Trach-Minh Tran

Extensive simulations are performed to investigate effects of electron cyclotron instabilities on the gyrotron beam quality, using two-dimensional axisymmetric particle-in-cell (PIG) codes. Both electrostatic and electromagnetic models, as well as realisti ...

1997

Feasibility Study of the Eu Home Team on a 170ghz 1mw Cw Gyrotron for Ech on Iter

Minh Quang Tran, Trach-Minh Tran

The gyrotron system for ECH and burn control on ITER requires at least 50MW of RF power at frequencies near 170GHz operating in CW. To meet these requirements, high efficiency gyrotron tubes with greater than or equal to 1MW power output capability are nec ...

1995

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