Small-bore (1. 8-mm), high-firing-rate (10-Hz) version of a repeating pneumatic hydrogen pellet injector

Journal Article · Wed Mar 01 04:00:00 EST 1995 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1145620· OSTI ID:6399807

Combs, S K; Foust, C R; Milora, S L ^[1]

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

Repeating pneumatic pellet injectors developed at the Oak Ridge National Laboratory (ORNL) were used for plasma fueling experiments on the Tokamak Fusion Test Reactor (TFTR) and the Joint European Torus (JET). For plasma fueling on the DIII--D tokamak, a small-bore (1.8-mm) injector has been developed and tested in the laboratory at pellet rates of up to 10 Hz and speeds of [le]1 km/s (for pulse lengths of up to 15 s). This performance represents the smallest pellet size and highest repetition rate demonstrated with an ORNL repeating pneumatic pellet injector. The design has been incorporated in the three-barrel injector that was previously used on JET; the injection system, equipped with nominal pellet sizes of 1.8-, 2.7-, and 4.0-mm diameter, has been installed on DIII--D and will be used in future plasma fueling experiments.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6399807
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 66:3; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700460* -- Fusion Technology-- Heating & Fueling Systems
CLOSED PLASMA DEVICES
CONTROL EQUIPMENT
DOUBLET-3 DEVICE
EQUIPMENT
FUEL PELLETS
Fu
Fuels-- (1992)
HYDROGEN ISOTOPES
ISOTOPES
PELLET INJECTION
PELLETS
PNEUMATIC CONTROLLERS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES