Operation and reliability of a pneumatic hydrogen pellet injection system on the Joint European Torus

S. K. Combs; T. C. Jernigan; L. R. Baylor; S. L. Milora; C. R. Foust; P. Kupschus; M. Gadeberg; W. Bailey

Operation and reliability of a pneumatic hydrogen pellet injection system on the Joint European Torus

S. K. Combs, T. C. Jernigan, L. R. Baylor, S. L. Milora, C. R. Foust, P. Kupschus, M. Gadeberg, W. Bailey

Fusion Energy Division

Research output: Contribution to conference › Paper › peer-review

Abstract

Developed at the Oak Ridge National Laboratory, the pneumatic-based, hydrogen-isotope, pellet injector was installed on the Joint European Torus (JET) during 1987 and has since been used in plasma fueling experiments. The injector consists of three independent machine-gun-like mechanisms (nominal pellet sizes of 2.7, 4.0, and 6.0 mm in diameter), and it features repetitive operation (1-5 Hz) for quasi-steady-state conditions (>10 s). An extensive set of injector diagnostics permits evaluation of parameters, including speed, mass, and integrity, for each pellet shot. Pellet speeds can be varied but typically range from 1.0 to 1.5 km/s. Over 5000 pellets have been fired with the equipment at JET, including about 2000 pellets shot for plasma fueling experiments. In recent experiments, the system performance has been outstanding, including excellent reproducibility in pellet speed and mass, and a reliability of >98% in delivering pellets to the plasma.

Original language	English
Pages	1305-1309
Number of pages	5
State	Published - 1989
Event	Proceedings - IEEE Thirteenth Symposium on Fusion Engineering Part 2 (of 2) - Knoxville, TN, USA Duration: Oct 2 1989 → Oct 6 1989

Conference

Conference	Proceedings - IEEE Thirteenth Symposium on Fusion Engineering Part 2 (of 2)
City	Knoxville, TN, USA
Period	10/2/89 → 10/6/89

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This output contributes to the following UN Sustainable Development Goals (SDGs)

Cite this

@conference{ceb5a42747034bde80c494b36d50ef54,

title = "Operation and reliability of a pneumatic hydrogen pellet injection system on the Joint European Torus",

abstract = "Developed at the Oak Ridge National Laboratory, the pneumatic-based, hydrogen-isotope, pellet injector was installed on the Joint European Torus (JET) during 1987 and has since been used in plasma fueling experiments. The injector consists of three independent machine-gun-like mechanisms (nominal pellet sizes of 2.7, 4.0, and 6.0 mm in diameter), and it features repetitive operation (1-5 Hz) for quasi-steady-state conditions (>10 s). An extensive set of injector diagnostics permits evaluation of parameters, including speed, mass, and integrity, for each pellet shot. Pellet speeds can be varied but typically range from 1.0 to 1.5 km/s. Over 5000 pellets have been fired with the equipment at JET, including about 2000 pellets shot for plasma fueling experiments. In recent experiments, the system performance has been outstanding, including excellent reproducibility in pellet speed and mass, and a reliability of >98% in delivering pellets to the plasma.",

author = "Combs, {S. K.} and Jernigan, {T. C.} and Baylor, {L. R.} and Milora, {S. L.} and Foust, {C. R.} and P. Kupschus and M. Gadeberg and W. Bailey",

year = "1989",

language = "English",

pages = "1305--1309",

note = "Proceedings - IEEE Thirteenth Symposium on Fusion Engineering Part 2 (of 2) ; Conference date: 02-10-1989 Through 06-10-1989",

}

TY - CONF

T1 - Operation and reliability of a pneumatic hydrogen pellet injection system on the Joint European Torus

AU - Combs, S. K.

AU - Jernigan, T. C.

AU - Baylor, L. R.

AU - Milora, S. L.

AU - Foust, C. R.

AU - Kupschus, P.

AU - Gadeberg, M.

AU - Bailey, W.

PY - 1989

Y1 - 1989

N2 - Developed at the Oak Ridge National Laboratory, the pneumatic-based, hydrogen-isotope, pellet injector was installed on the Joint European Torus (JET) during 1987 and has since been used in plasma fueling experiments. The injector consists of three independent machine-gun-like mechanisms (nominal pellet sizes of 2.7, 4.0, and 6.0 mm in diameter), and it features repetitive operation (1-5 Hz) for quasi-steady-state conditions (>10 s). An extensive set of injector diagnostics permits evaluation of parameters, including speed, mass, and integrity, for each pellet shot. Pellet speeds can be varied but typically range from 1.0 to 1.5 km/s. Over 5000 pellets have been fired with the equipment at JET, including about 2000 pellets shot for plasma fueling experiments. In recent experiments, the system performance has been outstanding, including excellent reproducibility in pellet speed and mass, and a reliability of >98% in delivering pellets to the plasma.

AB - Developed at the Oak Ridge National Laboratory, the pneumatic-based, hydrogen-isotope, pellet injector was installed on the Joint European Torus (JET) during 1987 and has since been used in plasma fueling experiments. The injector consists of three independent machine-gun-like mechanisms (nominal pellet sizes of 2.7, 4.0, and 6.0 mm in diameter), and it features repetitive operation (1-5 Hz) for quasi-steady-state conditions (>10 s). An extensive set of injector diagnostics permits evaluation of parameters, including speed, mass, and integrity, for each pellet shot. Pellet speeds can be varied but typically range from 1.0 to 1.5 km/s. Over 5000 pellets have been fired with the equipment at JET, including about 2000 pellets shot for plasma fueling experiments. In recent experiments, the system performance has been outstanding, including excellent reproducibility in pellet speed and mass, and a reliability of >98% in delivering pellets to the plasma.

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M3 - Paper

AN - SCOPUS:0024894892

SP - 1305

EP - 1309

T2 - Proceedings - IEEE Thirteenth Symposium on Fusion Engineering Part 2 (of 2)

Y2 - 2 October 1989 through 6 October 1989

ER -

Operation and reliability of a pneumatic hydrogen pellet injection system on the Joint European Torus

Abstract

Conference

UN SDGs

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