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PBX-M ion Bernstein wave heating overview

Conference ·
OSTI ID:10148776
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  1. Princeton Univ., NJ (United States). Plasma Physics Lab.
  2. ENEA, Frascati (Italy)
  3. National Inst. for Fusion Science, Nagoya (Japan)
  4. Japan Atomic Energy Research Inst., Tokai, Ibaraki (Japan)
  5. California Univ., Los Angeles, CA (United States)
  6. Oak Ridge National Lab., TN (United States)
  7. Massachusetts Inst. of Tech., Cambridge, MA (United States)
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A high power ion Bernstein wave heating system has been introduced on PBX-M for heating and for controlling the plasma pressure profile in an effort to achieve the stable high beta ``second stability`` regime. The pressure profile can be controlled through local bulk ion heating as well as density profile control. In bean-shaped plasmas with plasma currents range from 180 kA to 250 kA, good ion heating up to the highest, applied rf power, ({approx}700 kW) has been observed. The observed broadening of the ion temperature profile is consistent with localized off-axis bulk ion heating as predicted by IBW ray tracing calculations. Application of IBW also resulted in a greatly modified density profile. The ability for IBW to change the density profile appears to be particularly attractive for controlling the bootstrap current profile for advanced tokamaks. Many important IBWH-related edge physics results were also obtained, including ponderomotive edge plasma modification and parametric instability onset conditions. The experimental plan for the next IBW run includes investigation of synergy with LHCD, attainment of high bootstrap current fraction discharges utilizing the IBW density profile control, and exploration of high beta plasma regimes.
Research Organization:
Princeton Univ., NJ (United States). Plasma Physics Lab.
Sponsoring Organization:
USDOE, Washington, DC (United States)
DOE Contract Number:
AC02-76CH03073
OSTI ID:
10148776
Report Number(s):
PPPL-CFP--2811; CONF-9304112--3; ON: DE93011963
Country of Publication:
United States
Language:
English

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Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350
BERNSTEIN MODE
COMPACT IGNITION TOKAMAK
ION PLASMA WAVES
PARAMETRIC INSTABILITIES
PLASMA CONFINEMENT
PLASMA HEATING
PLASMA PRODUCTION, HEATING, CURRENT DRIVE, AND INTERACTIONS