Pellet injection into ATF plasmas

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6930988

Wilgen, J B; Bell, J D; England, A C; Fisher, P W; Howe, H C; Murakami, M; Rasmussen, D A; Richards, R K; Uckan, T; Wing, W R ^[1]; Bell, G L ^[2]; Qualls, A L ^[3]; Sudo, S ^[4]

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1. Oak Ridge National Lab., TN (USA)
2. Auburn Univ., AL (USA)
3. Tennessee Univ., Knoxville, TN (USA)
4. Kyoto Univ. (Japan)

Based on the favorable empirical scaling of stellarator confinement with increasing electron density, pellet fueling is expected to result in significant performance improvement of the ATF plasma. With gas-puff fueling, NBI heated plasmas in ATF are limited by a thermal collapse. Pellet fueling provides a potential means to delay this effect and gain access to the favorable high density confinement regime. To provide flexibility for optimization and physics studies, eight different pellet sizes are available. To date, line average densities of up to 4 {times} 10{sup 13} cm{sup {minus}3} have been achieved with a single pellet injected into a 0.7 MW NBI plasma at 0.95 T; the results from optimization studies with up to 1.5 MW of NBI power at 2 T will be presented.

• Research Organization: Oak Ridge National Lab., TN (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6930988
• Report Number(s): CONF-9003116-1; CONF-9003117-1; CONF-9003124-2; ON: DE90009229; TRN: 90-010560
• Resource Relation: Conference: US-USSR exchange visit to Kharkov Physico-Technical Institute seminar; Experiments on the Wendelstein VII-AS and ATF stellerators seminar; US-USSR exchange visit to Institute of General Physics seminar, Kharkov (USSR); Munich (Germany, F.R.); Moscow (USSR), 19-20 Mar 1990; 26-28 Mar 1990; 12-16 Mar 1990
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ATF TORSATRON
PELLET INJECTION
BEAM INJECTION HEATING
DEUTERIUM
ECR HEATING
ELECTRON DENSITY
PERFORMANCE
PLASMA CONFINEMENT
CLOSED PLASMA DEVICES
CONFINEMENT
HEATING
HIGH-FREQUENCY HEATING
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
NUCLEI
ODD-ODD NUCLEI
PLASMA HEATING
STABLE ISOTOPES
STELLARATORS
THERMONUCLEAR DEVICES
TORSATRON STELLARATOR
700205* - Fusion Power Plant Technology- Fuel
Heating
& Injection Systems