Published January 2016 | Version v1
Journal article Metadata-only

Effects of q-profiles of a weak magnetic shear on energetic ion excited q = 1 mode in tokamak plasmas

Creators

  • 1. State Key Lab of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871 (China)
  • 2. Institute of Fusion Science, School of Physical Science and Technology, Southwest Jiaotong University, Chengdu 610031 (China)
  • 3. Department of Physics, Harbin Institute of Technology, Harbin 150001 (China)

Description

In this paper, we study the effect of safety factor profiles, particularly with a very weak magnetic shear, on the m/n=1 mode excited by energetic ions in tokamak plasmas. It is found that the profile plays a significant role in the onset of the mode, and the thresholds for the instability are also derived. The numerical results for configurations with conventional or reversed non monotonic magnetic shears are discussed. The effects of radial location of rational surfaces, edge q value, and flatness of q-profile on the energetic ion excited mode are further analyzed in detail. (paper)

Availability note (English)

Available from http://dx.doi.org/10.1088/1674-1056/25/1/015203

Additional details

Identifiers

DOI
10.1088/1674-1056/25/1/015203;

Publishing Information

Journal Title
Chinese Physics. B
Journal Volume
25
Journal Issue
1
Journal Page Range
[7 p.]
ISSN
1674-1056

INIS

Country of Publication
China
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
47091467
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Descriptors DEI
MODE RATIONAL SURFACES; PLASMA; PLASMA INSTABILITY; Q-VALUE; SAFETY; SHEAR; TAIL IONS; TOKAMAK DEVICES
Descriptors DEC
CHARGED PARTICLES; CLOSED PLASMA DEVICES; ENERGY; INSTABILITY; IONS; MAGNETIC FIELD CONFIGURATIONS; MAGNETIC SURFACES; THERMONUCLEAR DEVICES