Ion cyclotron heating experiments and plans for the Advanced Toroidal Facility (ATF)

Conference · Fri Jan 01 00:00:00 EST 1993

OSTI ID:6380092

Rasmussen, D A; Batchelor, D B; Goulding, R J; Hoffman, D J; Jaeger, E F; Rome, J A; Thomas, C E

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; USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6380092
• 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
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TORSATRON STELLARATORS
ICR HEATING
ANTENNAS
BEAM INJECTION HEATING
ECR HEATING
LIMITERS
CLOSED PLASMA DEVICES
ELECTRICAL EQUIPMENT
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
PLASMA HEATING
STELLARATORS
THERMONUCLEAR DEVICES
700350* - Plasma Production
Heating
Current Drive
& Interactions- (1992-)