A new four-barrel pellet injection system for the TJ-II stellarator

S. K. Combs; C. R. Foust; J. M. McGill; L. R. Baylor; J. B.O. Caughman; D. T. Fehling; J. H. Harris; S. J. Meitner; D. A. Rasmussen; K. J. McCarthy; M. Chamorro; R. Garcia; C. Hidalgo; M. Medrano; E. Mirones; J. Olivares; R. Unamuno

doi:10.1109/SOFE.2011.6052244

A new four-barrel pellet injection system for the TJ-II stellarator

S. K. Combs, C. R. Foust, J. M. McGill, L. R. Baylor, J. B.O. Caughman, D. T. Fehling, J. H. Harris, S. J. Meitner, D. A. Rasmussen, K. J. McCarthy, M. Chamorro, R. Garcia, C. Hidalgo, M. Medrano, E. Mirones, J. Olivares, R. Unamuno

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

A new pellet injection system for the TJ-II stellarator has been developed/constructed as part of a collaboration between the Oak Ridge National Laboratory (ORNL) and the Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT). ORNL is providing most of the injector hardware and instrumentation, the pellet diagnostics, and the pellet transport tubes; CIEMAT is responsible for the injector stand/interface to the stellarator, cryogenic refrigerator, vacuum pumps/ballast volumes, gas manifolds, remote operations, plasma diagnostics, and data acquisition. The pellet injector design is an upgraded version of that used for the ORNL injector installed on the Madison Symmetric Torus (MST). It is a four-barrel system equipped with a cryogenic refrigerator for in situ hydrogen pellet formation and a combined mechanical punch/propellant valve system for pellet acceleration (speeds ∼100 to 1000 m/s). On TJ-II, it will be used as an active diagnostic and for fueling. To accommodate the plasma experiments planned for TJ-II, pellet sizes significantly smaller than those typically used for the MST application are required. The system will initially be equipped with four different pellet sizes, with the gun barrel bores ranging between ∼0.5 to 1.0 mm. The new system is almost complete and is described briefly here, highlighting the new features added since the original MST injector was constructed. Also, the future installation on TJ-II is reviewed.

Original language	English
Title of host publication	2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011
DOIs	https://doi.org/10.1109/SOFE.2011.6052244
State	Published - 2011
Event	2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011 - Chicago, IL, United States Duration: Jun 26 2011 → Jun 30 2011

Publication series

Name	Proceedings - Symposium on Fusion Engineering

Conference

Conference	2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011
Country/Territory	United States
City	Chicago, IL
Period	06/26/11 → 06/30/11

Keywords

TJ-II
diagnostic
fueling
hydrogen plasma
pellet injector

UN SDGs

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

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10.1109/SOFE.2011.6052244

Cite this

Combs, S. K., Foust, C. R., McGill, J. M., Baylor, L. R., Caughman, J. B. O., Fehling, D. T., Harris, J. H., Meitner, S. J., Rasmussen, D. A., McCarthy, K. J., Chamorro, M., Garcia, R., Hidalgo, C., Medrano, M., Mirones, E., Olivares, J., & Unamuno, R. (2011). A new four-barrel pellet injection system for the TJ-II stellarator. In 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011 Article 6052244 (Proceedings - Symposium on Fusion Engineering). https://doi.org/10.1109/SOFE.2011.6052244

@inproceedings{ac1433b3fea841d9835be9170f4c3b25,

title = "A new four-barrel pellet injection system for the TJ-II stellarator",

abstract = "A new pellet injection system for the TJ-II stellarator has been developed/constructed as part of a collaboration between the Oak Ridge National Laboratory (ORNL) and the Centro de Investigaciones Energ{\'e}ticas, Medioambientales y Tecnol{\'o}gicas (CIEMAT). ORNL is providing most of the injector hardware and instrumentation, the pellet diagnostics, and the pellet transport tubes; CIEMAT is responsible for the injector stand/interface to the stellarator, cryogenic refrigerator, vacuum pumps/ballast volumes, gas manifolds, remote operations, plasma diagnostics, and data acquisition. The pellet injector design is an upgraded version of that used for the ORNL injector installed on the Madison Symmetric Torus (MST). It is a four-barrel system equipped with a cryogenic refrigerator for in situ hydrogen pellet formation and a combined mechanical punch/propellant valve system for pellet acceleration (speeds ∼100 to 1000 m/s). On TJ-II, it will be used as an active diagnostic and for fueling. To accommodate the plasma experiments planned for TJ-II, pellet sizes significantly smaller than those typically used for the MST application are required. The system will initially be equipped with four different pellet sizes, with the gun barrel bores ranging between ∼0.5 to 1.0 mm. The new system is almost complete and is described briefly here, highlighting the new features added since the original MST injector was constructed. Also, the future installation on TJ-II is reviewed.",

keywords = "TJ-II, diagnostic, fueling, hydrogen plasma, pellet injector",

author = "Combs, {S. K.} and Foust, {C. R.} and McGill, {J. M.} and Baylor, {L. R.} and Caughman, {J. B.O.} and Fehling, {D. T.} and Harris, {J. H.} and Meitner, {S. J.} and Rasmussen, {D. A.} and McCarthy, {K. J.} and M. Chamorro and R. Garcia and C. Hidalgo and M. Medrano and E. Mirones and J. Olivares and R. Unamuno",

year = "2011",

doi = "10.1109/SOFE.2011.6052244",

language = "English",

isbn = "9781457706691",

series = "Proceedings - Symposium on Fusion Engineering",

booktitle = "2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011",

note = "2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011 ; Conference date: 26-06-2011 Through 30-06-2011",

}

Combs, SK, Foust, CR, McGill, JM, Baylor, LR , Caughman, JBO, Fehling, DT, Harris, JH , Meitner, SJ, Rasmussen, DA, McCarthy, KJ, Chamorro, M, Garcia, R, Hidalgo, C, Medrano, M, Mirones, E, Olivares, J & Unamuno, R 2011, A new four-barrel pellet injection system for the TJ-II stellarator. in 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011., 6052244, Proceedings - Symposium on Fusion Engineering, 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011, Chicago, IL, United States, 06/26/11. https://doi.org/10.1109/SOFE.2011.6052244

TY - GEN

T1 - A new four-barrel pellet injection system for the TJ-II stellarator

AU - Combs, S. K.

AU - Foust, C. R.

AU - McGill, J. M.

AU - Baylor, L. R.

AU - Caughman, J. B.O.

AU - Fehling, D. T.

AU - Harris, J. H.

AU - Meitner, S. J.

AU - Rasmussen, D. A.

AU - McCarthy, K. J.

AU - Chamorro, M.

AU - Garcia, R.

AU - Hidalgo, C.

AU - Medrano, M.

AU - Mirones, E.

AU - Olivares, J.

AU - Unamuno, R.

PY - 2011

Y1 - 2011

N2 - A new pellet injection system for the TJ-II stellarator has been developed/constructed as part of a collaboration between the Oak Ridge National Laboratory (ORNL) and the Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT). ORNL is providing most of the injector hardware and instrumentation, the pellet diagnostics, and the pellet transport tubes; CIEMAT is responsible for the injector stand/interface to the stellarator, cryogenic refrigerator, vacuum pumps/ballast volumes, gas manifolds, remote operations, plasma diagnostics, and data acquisition. The pellet injector design is an upgraded version of that used for the ORNL injector installed on the Madison Symmetric Torus (MST). It is a four-barrel system equipped with a cryogenic refrigerator for in situ hydrogen pellet formation and a combined mechanical punch/propellant valve system for pellet acceleration (speeds ∼100 to 1000 m/s). On TJ-II, it will be used as an active diagnostic and for fueling. To accommodate the plasma experiments planned for TJ-II, pellet sizes significantly smaller than those typically used for the MST application are required. The system will initially be equipped with four different pellet sizes, with the gun barrel bores ranging between ∼0.5 to 1.0 mm. The new system is almost complete and is described briefly here, highlighting the new features added since the original MST injector was constructed. Also, the future installation on TJ-II is reviewed.

AB - A new pellet injection system for the TJ-II stellarator has been developed/constructed as part of a collaboration between the Oak Ridge National Laboratory (ORNL) and the Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT). ORNL is providing most of the injector hardware and instrumentation, the pellet diagnostics, and the pellet transport tubes; CIEMAT is responsible for the injector stand/interface to the stellarator, cryogenic refrigerator, vacuum pumps/ballast volumes, gas manifolds, remote operations, plasma diagnostics, and data acquisition. The pellet injector design is an upgraded version of that used for the ORNL injector installed on the Madison Symmetric Torus (MST). It is a four-barrel system equipped with a cryogenic refrigerator for in situ hydrogen pellet formation and a combined mechanical punch/propellant valve system for pellet acceleration (speeds ∼100 to 1000 m/s). On TJ-II, it will be used as an active diagnostic and for fueling. To accommodate the plasma experiments planned for TJ-II, pellet sizes significantly smaller than those typically used for the MST application are required. The system will initially be equipped with four different pellet sizes, with the gun barrel bores ranging between ∼0.5 to 1.0 mm. The new system is almost complete and is described briefly here, highlighting the new features added since the original MST injector was constructed. Also, the future installation on TJ-II is reviewed.

KW - TJ-II

KW - diagnostic

KW - fueling

KW - hydrogen plasma

KW - pellet injector

UR - http://www.scopus.com/inward/record.url?scp=80955141318&partnerID=8YFLogxK

U2 - 10.1109/SOFE.2011.6052244

DO - 10.1109/SOFE.2011.6052244

M3 - Conference contribution

AN - SCOPUS:80955141318

SN - 9781457706691

T3 - Proceedings - Symposium on Fusion Engineering

BT - 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011

T2 - 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011

Y2 - 26 June 2011 through 30 June 2011

ER -

A new four-barrel pellet injection system for the TJ-II stellarator

Abstract

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Keywords

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