Study of runaway electrons using the conditional average sampling method in the Damavand tokamak
- Authors: Pourshahab B.1, Sadighzadeh A.2, Abdi M.R.3, Rasouli C.2
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Affiliations:
- Department of Nuclear Engineering, Faculty of Advance Sciences and Technologies
- Plasma Physics and Nuclear Fusion Research School
- Department of Physics, Faculty of Science
- Issue: Vol 43, No 3 (2017)
- Pages: 280-288
- Section: Tokamaks
- URL: https://journals.rcsi.science/1063-780X/article/view/186490
- DOI: https://doi.org/10.1134/S1063780X17030102
- ID: 186490
Cite item
Abstract
Some experiments for studying the runaway electron (RE) effects have been performed using the poloidal magnetic probes system installed around the plasma column in the Damavand tokamak. In these experiments, the so-called runaway-dominated discharges were considered in which the main part of the plasma current is carried by REs. The induced magnetic effects on the poloidal pickup coils signals are observed simultaneously with the Parail–Pogutse instability moments for REs and hard X-ray bursts. The output signals of all diagnostic systems enter the data acquisition system with 2 Msample/(s channel) sampling rate. The temporal evolution of the diagnostic signals is analyzed by the conditional average sampling (CAS) technique. The CASed profiles indicate RE collisions with the high-field-side plasma facing components at the instability moments. The investigation has been carried out for two discharge modes—low-toroidal-field (LTF) and high-toroidal-field (HTF) ones—related to both up and down limits of the toroidal magnetic field in the Damavand tokamak and their comparison has shown that the RE confinement is better in HTF discharges.
About the authors
B. Pourshahab
Department of Nuclear Engineering, Faculty of Advance Sciences and Technologies
Author for correspondence.
Email: bpourshahab@gmail.com
Iran, Islamic Republic of, Isfahan
A. Sadighzadeh
Plasma Physics and Nuclear Fusion Research School
Email: bpourshahab@gmail.com
Iran, Islamic Republic of, Tehran
M. R. Abdi
Department of Physics, Faculty of Science
Email: bpourshahab@gmail.com
Iran, Islamic Republic of, Isfahan
C. Rasouli
Plasma Physics and Nuclear Fusion Research School
Email: bpourshahab@gmail.com
Iran, Islamic Republic of, Tehran