NSTX high field side gas fueling system

H. W. Kugel; M. Anderson; G. Barnes; M. Bell; W. Blanchard; L. Dudek; D. Gates; R. Gernhardt; R. Maingi; D. Mueller; T. Provost; R. Raman; V. Soukhanovskii; J. Winston

NSTX high field side gas fueling system

H. W. Kugel, M. Anderson, G. Barnes, M. Bell, W. Blanchard, L. Dudek, D. Gates, R. Gernhardt, R. Maingi, D. Mueller, T. Provost, R. Raman, V. Soukhanovskii, J. Winston

PPPL Advanced Projects

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

3 Scopus citations

Abstract

Fueling NSTX plasmas with gas injected from the high field side (HFS) has produced earlier, more reliable transitions to the H-mode, longer H-mode durations, higher toroidal rotation, and higher edge T_e compared with similar discharges using the low field side (LFS) gas fueling injectors. The HFS gas fueling system consists of a Center Stack midplane injector, and an injector at the inner, upper corner of the Center Stack. The challenging design and installation constraints for the HFS gas system involved placing the control components as close as possible to the machinevacuum interface, devising a special feed-through flange, traversing through vessel regions whose temperatures during bake-out range from 150C to 350C, adapting the gas transport tubing size and route to the small Instrumentation wire channels behind the existing graphite PFC tiles on the Center Stack, and providing output orifices shielded from excessive plasma power depositions while concentrating the output flow to facilitate fast camera viewing and analysis. Design, recent performance, and future upgrades will be presented.

Original language	English (US)
Pages	82-85
Number of pages	4
State	Published - 2003
Event	20th IEEE/NPSS Symposium on Fusion Engineering, SOFE 03 - San Diego, CA, United States Duration: Oct 14 2003 → Oct 17 2003

Conference

Conference	20th IEEE/NPSS Symposium on Fusion Engineering, SOFE 03
Country/Territory	United States
City	San Diego, CA
Period	10/14/03 → 10/17/03

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Nuclear Energy and Engineering

Cite this

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title = "NSTX high field side gas fueling system",

abstract = "Fueling NSTX plasmas with gas injected from the high field side (HFS) has produced earlier, more reliable transitions to the H-mode, longer H-mode durations, higher toroidal rotation, and higher edge Te compared with similar discharges using the low field side (LFS) gas fueling injectors. The HFS gas fueling system consists of a Center Stack midplane injector, and an injector at the inner, upper corner of the Center Stack. The challenging design and installation constraints for the HFS gas system involved placing the control components as close as possible to the machinevacuum interface, devising a special feed-through flange, traversing through vessel regions whose temperatures during bake-out range from 150C to 350C, adapting the gas transport tubing size and route to the small Instrumentation wire channels behind the existing graphite PFC tiles on the Center Stack, and providing output orifices shielded from excessive plasma power depositions while concentrating the output flow to facilitate fast camera viewing and analysis. Design, recent performance, and future upgrades will be presented.",

author = "Kugel, \{H. W.\} and M. Anderson and G. Barnes and M. Bell and W. Blanchard and L. Dudek and D. Gates and R. Gernhardt and R. Maingi and D. Mueller and T. Provost and R. Raman and V. Soukhanovskii and J. Winston",

year = "2003",

language = "English (US)",

pages = "82--85",

note = "20th IEEE/NPSS Symposium on Fusion Engineering, SOFE 03 ; Conference date: 14-10-2003 Through 17-10-2003",

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TY - CONF

T1 - NSTX high field side gas fueling system

AU - Kugel, H. W.

AU - Anderson, M.

AU - Barnes, G.

AU - Bell, M.

AU - Blanchard, W.

AU - Dudek, L.

AU - Gates, D.

AU - Gernhardt, R.

AU - Maingi, R.

AU - Mueller, D.

AU - Provost, T.

AU - Raman, R.

AU - Soukhanovskii, V.

AU - Winston, J.

PY - 2003

Y1 - 2003

N2 - Fueling NSTX plasmas with gas injected from the high field side (HFS) has produced earlier, more reliable transitions to the H-mode, longer H-mode durations, higher toroidal rotation, and higher edge Te compared with similar discharges using the low field side (LFS) gas fueling injectors. The HFS gas fueling system consists of a Center Stack midplane injector, and an injector at the inner, upper corner of the Center Stack. The challenging design and installation constraints for the HFS gas system involved placing the control components as close as possible to the machinevacuum interface, devising a special feed-through flange, traversing through vessel regions whose temperatures during bake-out range from 150C to 350C, adapting the gas transport tubing size and route to the small Instrumentation wire channels behind the existing graphite PFC tiles on the Center Stack, and providing output orifices shielded from excessive plasma power depositions while concentrating the output flow to facilitate fast camera viewing and analysis. Design, recent performance, and future upgrades will be presented.

AB - Fueling NSTX plasmas with gas injected from the high field side (HFS) has produced earlier, more reliable transitions to the H-mode, longer H-mode durations, higher toroidal rotation, and higher edge Te compared with similar discharges using the low field side (LFS) gas fueling injectors. The HFS gas fueling system consists of a Center Stack midplane injector, and an injector at the inner, upper corner of the Center Stack. The challenging design and installation constraints for the HFS gas system involved placing the control components as close as possible to the machinevacuum interface, devising a special feed-through flange, traversing through vessel regions whose temperatures during bake-out range from 150C to 350C, adapting the gas transport tubing size and route to the small Instrumentation wire channels behind the existing graphite PFC tiles on the Center Stack, and providing output orifices shielded from excessive plasma power depositions while concentrating the output flow to facilitate fast camera viewing and analysis. Design, recent performance, and future upgrades will be presented.

UR - https://www.scopus.com/pages/publications/27644477009

UR - https://www.scopus.com/inward/citedby.url?scp=27644477009&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:27644477009

SP - 82

EP - 85

T2 - 20th IEEE/NPSS Symposium on Fusion Engineering, SOFE 03

Y2 - 14 October 2003 through 17 October 2003

ER -

NSTX high field side gas fueling system

Abstract

Conference

All Science Journal Classification (ASJC) codes

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