E. Mirones

Overview of TJ-II experiments

J. Sánchez, M. Acedo, D. Alegre, A. Alonso et autres

This paper presents an overview of experimental results and progress made in investigating density control using Li-coating, transport and L–H transitions in TJ-II. The Li-coating changes drastically the plasma–wall interaction, decreasing the recycling, and enlarges substantially the operational range of the device …

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A new four-barrel pellet injection system for the TJ-II stellarator

S. K. Combs, C. R. Foust, J. M. McGill, L. R. Baylor et autres

A new pellet injection system for the TJ-II stellarator has been developed/constructed as part of a collaboration between the Oak Ridge National Laboratory (ORNL) and the Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT). ORNL is providing most of the injector hardware …

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Confinement transitions in TJ-II under Li-coated wall conditions

J. Sánchez, M. Acedo, A. Alonso, Pedro Álvarez et autres

This paper presents the latest results on confinement studies in the TJ-II stellarator. The inherently strong plasma–wall interaction of TJ-II has been successfully reduced after lithium coating by vacuum evaporation. Besides H retention and low Z, Li was chosen because there exists …

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Overview of TJ-II experiments

J. Sánchez, M. Acedo, A. Alonso, Pedro Álvarez et autres

This paper presents an overview of experimental results and progress made in investigating the link between magnetic topology, electric fields and transport in the TJ-II stellarator. The smooth change from positive to negative electric field observed in the core region as the …

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Overview of JET results

F. Romanelli, M Laxåback, I. Abel, V. Afanesyev et autres

Scientific and technical activities on JET focus on the issues likely to affect the ITER design and operation. Our understanding of the ITER reference mode of operation, the ELMy H-mode, has progressed significantly. The extrapolation of ELM size to ITER has been …

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Bolometry systems for the TJ-II flexible heliac

M. A. Ochando, E. Mirones, Carlos-Iván Páez-Rueda, Pablo M. Rodríguez

Local plasma emissivity of TJ-II plasmas will be determined using pyroelectric detectors. For tomographic reconstructions three fan-like arrays, 20 channels each, will be installed at the top, side, and bottom ports of the same sector. The designed compact in-vessel systems will use …