Losses of runaway electrons in MHD-active plasmas of the COMPASS tokamak

被引：23

作者：

Ficker, O. ^{[1
,2
]}

Mlynar, J. ^{[1
]}

Vlainic, M. ^{[1
,2
,3
]}

Cerovsky, J. ^{[1
,2
]}

Urban, J. ^{[1
]}

Vondracek, P. ^{[1
,4
]}

Weinzettl, V. ^{[1
]}

Macusova, E. ^{[1
]}

Decker, J. ^{[5
]}

Gospodarczyk, M. ^{[6
]}

Martin, P. ^{[7
]}

Nardon, E. ^{[8
]}

Papp, G. ^{[9
]}

Plyusnin, V. V. ^{[10
]}

Reux, C. ^{[8
]}

Saint-Laurent, F. ^{[8
]}

Sommariva, C. ^{[8
]}

Cavalier, J. ^{[1
,11
]}

Havlicek, J. ^{[1
]}

Havranek, A. ^{[1
,12
]}

Hronova, O. ^{[1
]}

Imrisek, M. ^{[1
,4
]}

Markovic, T. ^{[1
,4
]}

Varju, J. ^{[1
]}

Paprok, R. ^{[1
,4
]}

Panek, R. ^{[1
]}

Hron, M. ^{[1
]}

机构：

[1] CAS, Inst Plasma Phys, CZ-18200 Prague 8, Czech Republic

[2] Czech Tech Univ, FNSPE, CZ-11519 Prague 1, Czech Republic

[3] Univ Ghent, Dept Appl Phys, B-9000 Ghent, Belgium

[4] Charles Univ Prague, FMP, CZ-12116 Prague 2, Czech Republic

[5] Ecole Polytech Fed Lausanne, Swiss Plasma Ctr, CH-1015 Lausanne, Switzerland

[6] Univ Roma Tor Vergata, I-00133 Rome, Italy

[7] Consorzio RFX, I-35127 Padua, Italy

[8] CEA, IRFM, F-13108 St Paul Les Durance, France

[9] Max Planck Inst Plasma Phys, D-85748 Garching, Germany

[10] IST, Inst Plasmas & Fusao Nucl, Lisbon, Portugal

[11] Univ Lorraine, Inst Jean Lamour IJL, F-54000 Nancy, France

[12] Czech Tech Univ, FEE, CZ-12000 Prague 2, Czech Republic

来源：

NUCLEAR FUSION | 2017年 / 57卷 / 07期

关键词：

tokamaks; runaway electrons; MHD instabilities; disruptions;

D O I：

10.1088/1741-4326/aa6aba

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The significant role of magnetic perturbations in mitigation and losses of runaway electrons (REs) was documented in dedicated experimental studies of RE at the COMPASS tokamak. REs in COMPASS are produced both in low density quiescent discharges and in disruptions triggered by massive gas injection (MGI). The role of the RE seed produced in the beginning of the discharge on the subsequent RE population proved significant. Modulation of the RE losses by MHD instabilities was observed at several characteristic frequencies, as well as by magnetic field oscillations related to power supplies. Magnetic islands seem to suppress the losses as the HXR signal is low and coherent with the island rotation frequency. Moreover, periods of increased losses of REs observed in the current quench (CQ) and early RE beam plateau phase of the MGI disruptions seem to be linked to the bursts of magnetic perturbation, and to the observation of filaments in the fast visible camera images.

引用

页数：10

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