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

Conference · Sat Oct 15 00:00:00 EDT 1994 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:7014074

Rasmussen, D A; Batchelor, D B; Goulding, R H; Hoffman, D J; Jaeger, E F; Rome, J A; Thomas, C E ^[1]

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1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

In Advanced Toroidal Facility (ATF) Ion Cyclotron Resonant Frequency (ICRF) experiments to data, 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.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7014074
• Report Number(s): CONF-9304112-; CODEN: APCPCS; TRN: 94-014218
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 289:1; Conference: 10. topical conference on radio frequency power in plasmas, Boston, MA (United States), 1-3 Apr 1993; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Fu
ICR HEATING
TOROIDAL CONFIGURATION
ANTENNAS
CYCLOTRON HARMONICS
DATA ANALYSIS
ECR HEATING
NEUTRAL ATOM BEAM INJECTION
PLASMA
POWER DENSITY
RADIOWAVE RADIATION
STELLARATORS
ANNULAR SPACE
BEAM INJECTION
CLOSED CONFIGURATIONS
CLOSED PLASMA DEVICES
CONFIGURATION
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
EQUIPMENT
HARMONICS
HEATING
HIGH-FREQUENCY HEATING
MAGNETIC FIELD CONFIGURATIONS
OSCILLATIONS
PLASMA HEATING
RADIATIONS
SPACE
THERMONUCLEAR DEVICES
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