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@ARTICLE{Tang:904079,
author = {Tang, T. and Zeng, L. and Chen, D. and Sun, Y. and Zhao, H.
and Zhou, T. and Ti, A. and Lin, S. and Zhou, R. and Zhu, X.
and Qian, J. and Liu, H. and Jie, Y. and Liang, Yunfeng and
Gao, X.},
title = {{R}unaway electron generation and loss in {EAST}
disruptions},
journal = {Nuclear fusion},
volume = {61},
number = {7},
issn = {0029-5515},
address = {Vienna},
publisher = {IAEA},
reportid = {FZJ-2021-05649},
pages = {076003 -},
year = {2021},
note = {kein Zugriff auf Postprint},
abstract = {Runaway currents have been detected during unintended
disruptions in the circular plasma with the limiter
configuration in the Experimental Advanced Superconducting
Tokamak (EAST). The runaway electron (RE) plateau can carry
up to $80\%$ of the pre-disruption plasma current. The
highest runaway currents correspond to the lowest loop
voltage, which is contrary to the observations made in most
tokamaks. This anomalous behavior is attributed to the
acceleration of the pre-existing wave resonant suprathermal
electrons by lower hybrid waves during the disruption decay
phase. Two distinct types of RE-related relaxation
phenomena, distinguished on the basis of the amplitude of
the magnetic fluctuations, have been found during the
disruptions. Large-amplitude magnetohydrodynamic activity
with indications of RE loss is observed during the RE
plateau when the edge safety factor decreases to less than
3, and the external kink mode is discussed to resolve this
anomaly. Burst-like relaxations with small-amplitude
magnetic fluctuations and ∼0.6 kHz frequency are confirmed
from the spikes in the hard x-ray array signals under a
negative loop voltage. Measurement of the RE energy
distribution suggests that the instability is driven by
medium-energy REs.},
cin = {IEK-4},
ddc = {620},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
pid = {G:(DE-HGF)POF4-134},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000655613000001},
doi = {10.1088/1741-4326/abf62f},
url = {https://juser.fz-juelich.de/record/904079},
}