Non-inductive solenoid-less plasma current startup in NSTX using transient CHI

R. Raman; D. Mueller; T. R. Jarboe; B. A. Nelson; M. G. Bell; M. Ono; T. Bigelow; R. Kaita; B. Leblanc; K. C. Lee; R. Maqueda; J. Menard; S. Paul; L. Roquemore

doi:10.1088/0029-5515/47/8/009

Non-inductive solenoid-less plasma current startup in NSTX using transient CHI

R. Raman, D. Mueller, T. R. Jarboe, B. A. Nelson, M. G. Bell, M. Ono, T. Bigelow, R. Kaita, B. Leblanc, K. C. Lee, R. Maqueda, J. Menard, S. Paul, L. Roquemore

Fusion Technology

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23 Scopus citations

Abstract

Coaxial helicity injection (CHI) has been successfully used in the National Spherical Torus Experiment for a demonstration of closed flux current generation without the use of the central solenoid. The favourable properties of the spherical torus (ST) arise from its very small aspect ratio. However, small aspect ratio devices have very restricted space for a substantial central solenoid. Thus methods for initiating the plasma current without relying on induction from a central solenoid are essential for the viability of the ST concept. CHI is a promising candidate for solenoid-free plasma startup in a ST. The method has now produced closed flux current up to 160 kA verifying the high current capability of this method in a large ST built with conventional tokamak components.

Original language	English
Article number	009
Pages (from-to)	792-799
Number of pages	8
Journal	Nuclear Fusion
Volume	47
Issue number	8
DOIs	https://doi.org/10.1088/0029-5515/47/8/009
State	Published - Aug 1 2007

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title = "Non-inductive solenoid-less plasma current startup in NSTX using transient CHI",

abstract = "Coaxial helicity injection (CHI) has been successfully used in the National Spherical Torus Experiment for a demonstration of closed flux current generation without the use of the central solenoid. The favourable properties of the spherical torus (ST) arise from its very small aspect ratio. However, small aspect ratio devices have very restricted space for a substantial central solenoid. Thus methods for initiating the plasma current without relying on induction from a central solenoid are essential for the viability of the ST concept. CHI is a promising candidate for solenoid-free plasma startup in a ST. The method has now produced closed flux current up to 160 kA verifying the high current capability of this method in a large ST built with conventional tokamak components.",

author = "R. Raman and D. Mueller and Jarboe, {T. R.} and Nelson, {B. A.} and Bell, {M. G.} and M. Ono and T. Bigelow and R. Kaita and B. Leblanc and Lee, {K. C.} and R. Maqueda and J. Menard and S. Paul and L. Roquemore",

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T1 - Non-inductive solenoid-less plasma current startup in NSTX using transient CHI

AU - Raman, R.

AU - Mueller, D.

AU - Jarboe, T. R.

AU - Nelson, B. A.

AU - Bell, M. G.

AU - Ono, M.

AU - Bigelow, T.

AU - Kaita, R.

AU - Leblanc, B.

AU - Lee, K. C.

AU - Maqueda, R.

AU - Menard, J.

AU - Paul, S.

AU - Roquemore, L.

PY - 2007/8/1

Y1 - 2007/8/1

N2 - Coaxial helicity injection (CHI) has been successfully used in the National Spherical Torus Experiment for a demonstration of closed flux current generation without the use of the central solenoid. The favourable properties of the spherical torus (ST) arise from its very small aspect ratio. However, small aspect ratio devices have very restricted space for a substantial central solenoid. Thus methods for initiating the plasma current without relying on induction from a central solenoid are essential for the viability of the ST concept. CHI is a promising candidate for solenoid-free plasma startup in a ST. The method has now produced closed flux current up to 160 kA verifying the high current capability of this method in a large ST built with conventional tokamak components.

AB - Coaxial helicity injection (CHI) has been successfully used in the National Spherical Torus Experiment for a demonstration of closed flux current generation without the use of the central solenoid. The favourable properties of the spherical torus (ST) arise from its very small aspect ratio. However, small aspect ratio devices have very restricted space for a substantial central solenoid. Thus methods for initiating the plasma current without relying on induction from a central solenoid are essential for the viability of the ST concept. CHI is a promising candidate for solenoid-free plasma startup in a ST. The method has now produced closed flux current up to 160 kA verifying the high current capability of this method in a large ST built with conventional tokamak components.

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Non-inductive solenoid-less plasma current startup in NSTX using transient CHI

Abstract

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