ECRH experiments in a toroidal octupole
Conference
·
OSTI ID:4152888
Electron cyclotron heating rates were measured for low density plasmas ($omega$$sup 2$/sub p/ much less than $omega$$sup 2$) in a toroidal octupole by the sweep method with resonance zones situated near the minor axis of the toroid. The energy absorbed by the plasma from the 100 mW frequency sweep oscillator is determined from the broadening of the cavity modes. The heating rate is measured for different magnetic field strengths, electron temperatures, electron-neutral collision frequencies and plasma densities. The scaling of heating rate with plasma density is different from previous results of high frequency (10 GHz) cavity mode measurements. The difference is explained by the different positions of the resonance zones. (auth)
- Research Organization:
- Univ. of Wisconsin, Madison; Texas Tech Univ., Lubbock (USA). Plasma Lab.
- NSA Number:
- NSA-33-011624
- OSTI ID:
- 4152888
- Report Number(s):
- CONF-740642--
- Country of Publication:
- United States
- Language:
- English
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