Ion cyclotron heating experiments and plans for the Advanced Toroidal Facility (ATF)
Toroidal Facility (ATF) Ion Cyclotron Resonant Frequency (ICRF) experiments to date, a single-strap tunable antenna with carbon limiters has been used at power densities up to 13.6 MW/m{sup 2} (900 kW). Hydrogen minority heating experiments at 14.4 MHz were performed in deuterium plasmas formed initially with both second-harmonic electron cyclotron heating (ECH) and helium neutral beam injection (NBI). No ICRF heating was observed in the low-density ECH target plasmas. Two distinct NBI plus ICRF operating modes are described. The moderate heating of these discharges is probably limited by impurities sputtered from the vessel walls and/or poorly confined orbits for the heated particles. A two-strap, phased antenna, designed to reduce impurities and capable of both minority and direct electron heating is described. A second antenna design for optimizing the coupling to well confined ion orbits, additional ICRF heating schemes, and methods for reducing the RF edge interactions in a stellarator geometry are also being considered.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10155286
- Report Number(s):
- CONF-9304112-10; ON: DE93012965
- Resource Relation:
- Conference: 10. topical conference on radio frequency power in plasmas,Boston, MA (United States),1-3 Apr 1993; Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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