Published March 2004 | Version v1
Journal article Metadata-only

Experimental and theoretical research about a scenario to produce high-beta spherical tokamak by merging method

Creators

  • 1. Tokyo Univ., Dept. of Advanced Energy, Tokyo (Japan)
  • 2. Tokyo Univ., Dept. of Electrical Engineering, Tokyo (Japan)
  • 3. Meidensha Corp., Tokyo (Japan)
  • 4. Tokyo Univ., High Temperature Plasma Center, Tokyo (Japan)

Description

The ballooning stability of high beta spherical tokamak (ST) was numerically investigated using 2-D magnetic field measurement of high beta ST in TS-3 ST merging experiment. Numerical analysis of experimental result indicates that the high beta ST produced by two merging STs locates in the boundary region of the first and the second stabilities. Effects of current and pressure profiles on the ballooning stability were studied by varying these profiles artificially around the experimental profiles. The broader pressure profile and the hollower current profiles cause the larger merginal beta value and the wider window region between the first-and the second-stable regions. On the basis of these results, a start-up scenario for ultra-high-beta and second-stable ST was proposed using two merging STs with additional RF heating. (author)

Additional details

Publishing Information

Journal Title
Purazuma, Kaku Yugo Gakkai-Shi
Journal Volume
80
Journal Issue
3
Journal Page Range
p. 249-255
ISSN
0918-7928

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
35049311
Subject category
S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
Descriptors DEI
BALLOONING INSTABILITY; EVALUATION; HIGH-BETA PLASMA; MAGNETIC FIELD CONFIGURATIONS; MHD EQUILIBRIUM; NUMERICAL SOLUTION; PLASMA PRESSURE; PLASMA RADIAL PROFILES; PLASMA RINGS; SPHERICAL CONFIGURATION; STABILIZATION; TS-3 DEVICE
Descriptors DEC
CLOSED PLASMA DEVICES; CONFIGURATION; EQUILIBRIUM; INSTABILITY; MATHEMATICAL SOLUTIONS; PLASMA; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; SPHEROMAK DEVICES; THERMONUCLEAR DEVICES; TOKAMAK DEVICES

Optional Information

Notes
12 refs., 12 figs.