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Runaway electron beam controlCarnevale, D. ...Post-disruption runaway electron (RE) beams in tokamaks with large current can cause deep melting of the vessel and are one of the major concerns for ITER operations. Consequently, a considerable ... effort is provided by the scientific community in order to test RE mitigation strategies. We present an overview of the results obtained at FTU and TCV controlling the current and position of RE beams to improve safety and repeatability of mitigation studies such as massive gas (MGI) and shattered pellet injections (SPI). We show that the proposed RE beam controller (REB-C) implemented at FTU and TCV is effective and that current reduction of the beam can be performed via the central solenoid reducing the energy of REs, providing an alternative/parallel mitigation strategy to MGI/SPI. Experimental results show that, meanwhile deuterium pellets injected on a fully formed RE beam are ablated but do not improve RE energy dissipation rate, heavy metals injected by a laser blow off system on low-density flat-top discharges with a high level of RE seeding seem to induce disruptions expelling REs. Instabilities during the RE beam plateau phase have shown to enhance losses of REs, expelled from the beam core. Then, with the aim of triggering instabilities to increase RE losses, an oscillating loop voltage has been tested on RE beam plateau phase at TCV revealing, for the first time, what seems to be a full conversion from runaway to ohmic current. We finally report progresses in the design of control strategies at JET in view of the incoming SPI mitigation experiments.Source: Plasma physics and controlled fusion. - ISSN 0741-3335 (Vol. 61, Iss. 1, 2019, 7 str.)Type of material - article, component partPublish date - 2019Language - englishCOBISS.SI-ID - 13865219
Author
Carnevale, D. |
Ariola, Marco |
Artaserse, G. |
Bagnato, F. |
Bin, W. |
Boncagni, L. |
Bolzonella, T. |
Bombarda, F. |
Buratti, P. |
Čufar, Aljaž |
Drenik, Aleksander, 1979- |
Kos, Bor, 1989- |
Kodeli, Ivan Aleksander |
Lengar, Igor |
Štancar, Žiga |
Snoj, Luka, 1981-
Topics
jedrska fizika
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Carnevale, D. | ![]() |
Ariola, Marco | ![]() |
Artaserse, G. | ![]() |
Bagnato, F. | ![]() |
Bin, W. | ![]() |
Boncagni, L. | ![]() |
Bolzonella, T. | ![]() |
Bombarda, F. | ![]() |
Buratti, P. | ![]() |
Čufar, Aljaž | 36329 |
Drenik, Aleksander, 1979- | 26476 |
Kos, Bor, 1989- | 38202 |
Kodeli, Ivan Aleksander | 03943 |
Lengar, Igor | 19167 |
Štancar, Žiga | 37483 |
Snoj, Luka, 1981- | 27819 |
Source: Personal bibliographies
and: SICRIS
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