Plasma rotation and rf heating in DIII-D
Conference
·
OSTI ID:354991
- General Atomics, San Diego, CA (United States); and others
In a variety of discharge conditions on DIII-D it is observed that rf electron heating reduces the toroidal rotation speed and core ion temperature. The rf heating can be with either fast wave or electron cyclotron heating and this effect is insensitive to the details of the launched toroidal wavenumber spectrum. To date all target discharges have rotation first established with co-directed neutral beam injection. A possible cause is enhanced ion momentum and thermal diffusivity due to electron heating effectively creating greater anomalous viscosity. Another is that a counter directed toroidal force is applied to the bulk plasma via rf driven radial current.
- Research Organization:
- General Atomics, San Diego, CA (United States); Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- AC03-99ER54463; W-7405-ENG-48
- OSTI ID:
- 354991
- Report Number(s):
- GA--A23080; CONF-990411--; ON: DE99003184
- Country of Publication:
- United States
- Language:
- English
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