Overview of DIII-D off-axis neutral beam project

C. J. Murphy; M. Abrahim; P. M. Anderson; H. K. Chiu; H. J. Grunloh; M. J. Hansink; K. L. Holtrop; R. M. Hong; A. G. Kellman; D. H. Kellman; P. S. Mauzey; S. Noraky; C. J. Pawley; J. Rauch; J. T. Scoville; M. A. Van Zeeland; H. H. Yip; R. L. Wood; M. Murakami; J. M. Park; W. W. Heidbrink

doi:10.1109/SOFE.2011.6052323

Overview of DIII-D off-axis neutral beam project

C. J. Murphy, M. Abrahim, P. M. Anderson, H. K. Chiu, H. J. Grunloh, M. J. Hansink, K. L. Holtrop, R. M. Hong, A. G. Kellman, D. H. Kellman, P. S. Mauzey, S. Noraky, C. J. Pawley, J. Rauch, J. T. Scoville, M. A. Van Zeeland, H. H. Yip, R. L. Wood, M. Murakami, J. M. ParkW. W. Heidbrink

Plasma Theory and Modeling

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

8 Scopus citations

Abstract

DIII-D has four neutral beamlines (NB). Each of these beamlines has two ion sources, each of which injects up to 2.5 MW for 3 s. These beamlines intersect the vacuum vessel at an angle of 19.5 deg off from radial, enabling current drive in the same direction as the plasma current (co-injection). In 2004, one of these beamlines (210 deg) was rotated to provide counter-injection (opposite of plasma current). A different beamline (150 deg) has been modified to have the capability to provide off-axis neutral beam current drive. The goal of the off-axis injection is to have the center of the ion sources aimed at a position 40 cm below the geometric center of the plasma. To achieve this off-axis injection, the beamline requires a mechanical lifting system that can elevate the beamline up to 16.5 deg from horizontal. The beamline also requires more strongly vertically focused ion sources (in order to pass the beam through a reduced effective aperture) as well as modified internal components. Additionally, the design of the new internal components incorporated modifications to allow for the doubling of ion source pulse lengths without the need for active cooling. This paper discusses the various beamline system design requirements for off-axis injection, as well as the results from the actual commissioning of the beamline. Overviews of the design and performance of mechanical lifting system (hydraulics and controls), focused ion sources, flexible beamline support systems (vacuum, cryogenic, power and water cooling), and internal beamline collimators are included. Additionally, the in-vessel monitoring and shine-through protection requirements are discussed. The actual data obtained during beamline commissioning and during normal physics operations is also presented.

Original language	English
Title of host publication	2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011
DOIs	https://doi.org/10.1109/SOFE.2011.6052323
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

UN SDGs

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

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10.1109/SOFE.2011.6052323

Cite this

Murphy, C. J., Abrahim, M., Anderson, P. M., Chiu, H. K., Grunloh, H. J., Hansink, M. J., Holtrop, K. L., Hong, R. M., Kellman, A. G., Kellman, D. H., Mauzey, P. S., Noraky, S., Pawley, C. J., Rauch, J., Scoville, J. T., Van Zeeland, M. A., Yip, H. H., Wood, R. L., Murakami, M., ... Heidbrink, W. W. (2011). Overview of DIII-D off-axis neutral beam project. In 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011 Article 6052323 (Proceedings - Symposium on Fusion Engineering). https://doi.org/10.1109/SOFE.2011.6052323

@inproceedings{25f9b1438fa5485abd9d17ad93099af6,

title = "Overview of DIII-D off-axis neutral beam project",

abstract = "DIII-D has four neutral beamlines (NB). Each of these beamlines has two ion sources, each of which injects up to 2.5 MW for 3 s. These beamlines intersect the vacuum vessel at an angle of 19.5 deg off from radial, enabling current drive in the same direction as the plasma current (co-injection). In 2004, one of these beamlines (210 deg) was rotated to provide counter-injection (opposite of plasma current). A different beamline (150 deg) has been modified to have the capability to provide off-axis neutral beam current drive. The goal of the off-axis injection is to have the center of the ion sources aimed at a position 40 cm below the geometric center of the plasma. To achieve this off-axis injection, the beamline requires a mechanical lifting system that can elevate the beamline up to 16.5 deg from horizontal. The beamline also requires more strongly vertically focused ion sources (in order to pass the beam through a reduced effective aperture) as well as modified internal components. Additionally, the design of the new internal components incorporated modifications to allow for the doubling of ion source pulse lengths without the need for active cooling. This paper discusses the various beamline system design requirements for off-axis injection, as well as the results from the actual commissioning of the beamline. Overviews of the design and performance of mechanical lifting system (hydraulics and controls), focused ion sources, flexible beamline support systems (vacuum, cryogenic, power and water cooling), and internal beamline collimators are included. Additionally, the in-vessel monitoring and shine-through protection requirements are discussed. The actual data obtained during beamline commissioning and during normal physics operations is also presented.",

author = "Murphy, {C. J.} and M. Abrahim and Anderson, {P. M.} and Chiu, {H. K.} and Grunloh, {H. J.} and Hansink, {M. J.} and Holtrop, {K. L.} and Hong, {R. M.} and Kellman, {A. G.} and Kellman, {D. H.} and Mauzey, {P. S.} and S. Noraky and Pawley, {C. J.} and J. Rauch and Scoville, {J. T.} and {Van Zeeland}, {M. A.} and Yip, {H. H.} and Wood, {R. L.} and M. Murakami and Park, {J. M.} and Heidbrink, {W. W.}",

year = "2011",

doi = "10.1109/SOFE.2011.6052323",

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",

}

Murphy, CJ, Abrahim, M, Anderson, PM, Chiu, HK, Grunloh, HJ, Hansink, MJ, Holtrop, KL, Hong, RM, Kellman, AG, Kellman, DH, Mauzey, PS, Noraky, S, Pawley, CJ, Rauch, J, Scoville, JT, Van Zeeland, MA, Yip, HH, Wood, RL, Murakami, M, Park, JM & Heidbrink, WW 2011, Overview of DIII-D off-axis neutral beam project. in 2011 IEEE/NPSS 24th Symposium on Fusion Engineering, SOFE 2011., 6052323, 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.2011.6052323

TY - GEN

T1 - Overview of DIII-D off-axis neutral beam project

AU - Murphy, C. J.

AU - Abrahim, M.

AU - Anderson, P. M.

AU - Chiu, H. K.

AU - Grunloh, H. J.

AU - Hansink, M. J.

AU - Holtrop, K. L.

AU - Hong, R. M.

AU - Kellman, A. G.

AU - Kellman, D. H.

AU - Mauzey, P. S.

AU - Noraky, S.

AU - Pawley, C. J.

AU - Rauch, J.

AU - Scoville, J. T.

AU - Van Zeeland, M. A.

AU - Yip, H. H.

AU - Wood, R. L.

AU - Murakami, M.

AU - Park, J. M.

AU - Heidbrink, W. W.

PY - 2011

Y1 - 2011

N2 - DIII-D has four neutral beamlines (NB). Each of these beamlines has two ion sources, each of which injects up to 2.5 MW for 3 s. These beamlines intersect the vacuum vessel at an angle of 19.5 deg off from radial, enabling current drive in the same direction as the plasma current (co-injection). In 2004, one of these beamlines (210 deg) was rotated to provide counter-injection (opposite of plasma current). A different beamline (150 deg) has been modified to have the capability to provide off-axis neutral beam current drive. The goal of the off-axis injection is to have the center of the ion sources aimed at a position 40 cm below the geometric center of the plasma. To achieve this off-axis injection, the beamline requires a mechanical lifting system that can elevate the beamline up to 16.5 deg from horizontal. The beamline also requires more strongly vertically focused ion sources (in order to pass the beam through a reduced effective aperture) as well as modified internal components. Additionally, the design of the new internal components incorporated modifications to allow for the doubling of ion source pulse lengths without the need for active cooling. This paper discusses the various beamline system design requirements for off-axis injection, as well as the results from the actual commissioning of the beamline. Overviews of the design and performance of mechanical lifting system (hydraulics and controls), focused ion sources, flexible beamline support systems (vacuum, cryogenic, power and water cooling), and internal beamline collimators are included. Additionally, the in-vessel monitoring and shine-through protection requirements are discussed. The actual data obtained during beamline commissioning and during normal physics operations is also presented.

AB - DIII-D has four neutral beamlines (NB). Each of these beamlines has two ion sources, each of which injects up to 2.5 MW for 3 s. These beamlines intersect the vacuum vessel at an angle of 19.5 deg off from radial, enabling current drive in the same direction as the plasma current (co-injection). In 2004, one of these beamlines (210 deg) was rotated to provide counter-injection (opposite of plasma current). A different beamline (150 deg) has been modified to have the capability to provide off-axis neutral beam current drive. The goal of the off-axis injection is to have the center of the ion sources aimed at a position 40 cm below the geometric center of the plasma. To achieve this off-axis injection, the beamline requires a mechanical lifting system that can elevate the beamline up to 16.5 deg from horizontal. The beamline also requires more strongly vertically focused ion sources (in order to pass the beam through a reduced effective aperture) as well as modified internal components. Additionally, the design of the new internal components incorporated modifications to allow for the doubling of ion source pulse lengths without the need for active cooling. This paper discusses the various beamline system design requirements for off-axis injection, as well as the results from the actual commissioning of the beamline. Overviews of the design and performance of mechanical lifting system (hydraulics and controls), focused ion sources, flexible beamline support systems (vacuum, cryogenic, power and water cooling), and internal beamline collimators are included. Additionally, the in-vessel monitoring and shine-through protection requirements are discussed. The actual data obtained during beamline commissioning and during normal physics operations is also presented.

UR - http://www.scopus.com/inward/record.url?scp=80955141243&partnerID=8YFLogxK

U2 - 10.1109/SOFE.2011.6052323

DO - 10.1109/SOFE.2011.6052323

M3 - Conference contribution

AN - SCOPUS:80955141243

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 -

Overview of DIII-D off-axis neutral beam project

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