Analysis and expansion of the quasi-continuous exhaust (QCE) regime in ASDEX Upgrade

Publications associées (20)

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SOLPS5 simulations of Type I ELMing H-mode at JET

Richard Pitts, Barbora Bruant Gulejová

This paper aims to contribute both to the ongoing process of scrape-off layer code-experiment and code-code benchmarking. Results are presented from SOLPS5 simulations of two high power JET H-modes with similar magnetic configuration, concentrating in the ...

Elsevier2009

ELM resolved energy distribution studies in the JET MKII Gas-Box divertor using infra-red thermography

Richard Pitts

Using infra-red (IR) thermography, power loads onto the MKII Gas-Box divertor targets have been investigated in Type-I ELMy H-Mode plasmas at JET in medium current discharges (I-p = 2.6MA and B-T = 2.7 T). Heat fluxes are calculated from the measured diver ...

2007

Divertor power deposition and target current asymmetries during type-1 ELMS in ASDEX Upgrade and JET

Richard Pitts

Analysis of the type-l ELM power load asymmetries using infra-red thermography and target current measurements is performed ASDEX Upgrade Upper Single Null and JET DOC-L type-I ELMy H-Mode discharges with 'normal' and,reversed' field direction, i.e. with t ...

2007

Survey of Type I ELM dynamics measurements

Richard Pitts

This report summarizes Type I edge localized mode (ELM) dynamics measurements from a number of tokamaks, including ASDEX-Upgrade, DIII-D, JET, JT-60U and MAST, with the goal of providing guidance and insight for the development of ELM simulation and modell ...

2006

Third harmonic EC heating of ELMy H-mode in TCV

Yves Martin, Stefano Alberti, Laurie Porte

Ohmic H-mode discharges in the Tokamak Configuration Variable (TCV) have recently been heated for the first time by electron cyclotron (EC) waves at the 3rd harmonic (X3) at full power. New edge localized mode (ELM) behaviour has been found, with larger am ...

2006

Impact of fast vertical and radial plasma movement on type-1 ELMs in ASDEX upgrade

Yves Martin, Jonathan Bryan Lister, Sun Hee Kim

For the ITER project it is clear that steps have to be taken in order to avoid or mitigate type-I ELMs when operating in the standard H-mode scenario. Otherwise, divertor power loads induced by intrinsic ELMs will result in an intolerably short divertor li ...

2006

Far SOL ELM ion energies in JET

Richard Pitts

There is an increasing body of evidence that the energy lost from diverted tokamak plasmas due to edge localized mode (ELM) activity may not be confined solely to deposition on divertor components. Plasma-facing surfaces in the main confinement chamber als ...

IOP Publishing Ltd2006

A model of ELM filament energy evolution due to parallel losses

Richard Pitts

In this paper, two simplified models of edge localized mode (ELM) power exhaust are developed, one based on the kinetic and the other on the fluid treatment of parallel losses. These models are found to capture many (though not all) of the salient features ...

2006

Integrated exhaust scenarios with actively controlled ELMs

Yves Martin, Jonathan Bryan Lister, René Uwe Schneider, Hartmut Zohm

An integrated radiative high performance scenario has been established at ASDEX Upgrade based on simultaneous feedback control of the average divertor neutral particle and power flux in combination with a high, pellet induced frequency of edge localized mo ...

IOP Publishing Ltd2005

Local 3D perturbation experiments for probing the ELM stability

Yves Martin, Jonathan Bryan Lister

Empirical estimates indicate that the transient divertor power load induced by type-I ELMs in the standard H-mode ITER scenario might result in intolerably short target life times. Significant experimental effort has been put on the exploration of recipes ...

2005

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