Overview of the Helicity Injected Torus (HIT) program

A. J. Redd; T. R. Jarboe; W. T. Hamp; B. A. Nelson; R. G. O'Neill; P. E. Sieck; R. J. Smith; G. L. Sutphin; J. S. Wrobel

doi:10.1007/s10894-006-9049-y

Overview of the Helicity Injected Torus (HIT) program

A. J. Redd, T. R. Jarboe, W. T. Hamp, B. A. Nelson, R. G. O'Neill, P. E. Sieck, R. J. Smith, G. L. Sutphin, J. S. Wrobel

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The Helicity Injected Torus with Steady Inductive Helicity Injection (HIT-SI) consists of a "bowtie"-shaped axisymmetric confinement region, with two half-torus helicity injectors mounted on each side of the axisymmetric flux conserver [Sieck et al, IEEE Trans. Plasma Sci., v.33, p.723 (2005); Jarboe, Fusion Technology, v.36, p.85 (1999)]. Current and flux are driven sinusoidally with time in each injector, with the goal of generating and sustaining an axisymmetric spheromak in the main confinement region. Improvements in machine conditioning have enabled systematic study of HIT-SI discharges with significant toroidal current I _TOR, including cases in which this current I _TOR switches sign one or more times during the discharge. Statistical studies of all HIT-SI discharges to date demonstrate a minimum injected power to form significant I _TOR, and that the maximum I _TOR scales approximately linearly with the total injected power.

Original language	English (US)
Pages (from-to)	163-168
Number of pages	6
Journal	Journal of Fusion Energy
Volume	26
Issue number	1-2
DOIs	https://doi.org/10.1007/s10894-006-9049-y
State	Published - Jun 2007
Externally published	Yes

Keywords

Helicity injection current drive
Magnetic confinement
Spheromak

ASJC Scopus subject areas

Nuclear and High Energy Physics
Nuclear Energy and Engineering

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10.1007/s10894-006-9049-y

Cite this

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title = "Overview of the Helicity Injected Torus (HIT) program",

abstract = "The Helicity Injected Torus with Steady Inductive Helicity Injection (HIT-SI) consists of a {"}bowtie{"}-shaped axisymmetric confinement region, with two half-torus helicity injectors mounted on each side of the axisymmetric flux conserver [Sieck et al, IEEE Trans. Plasma Sci., v.33, p.723 (2005); Jarboe, Fusion Technology, v.36, p.85 (1999)]. Current and flux are driven sinusoidally with time in each injector, with the goal of generating and sustaining an axisymmetric spheromak in the main confinement region. Improvements in machine conditioning have enabled systematic study of HIT-SI discharges with significant toroidal current I TOR, including cases in which this current I TOR switches sign one or more times during the discharge. Statistical studies of all HIT-SI discharges to date demonstrate a minimum injected power to form significant I TOR, and that the maximum I TOR scales approximately linearly with the total injected power.",

keywords = "Helicity injection current drive, Magnetic confinement, Spheromak",

author = "Redd, {A. J.} and Jarboe, {T. R.} and Hamp, {W. T.} and Nelson, {B. A.} and O'Neill, {R. G.} and Sieck, {P. E.} and Smith, {R. J.} and Sutphin, {G. L.} and Wrobel, {J. S.}",

note = "Funding Information: The authors thank John Rogers and George Andexler for their technical assistance in the design, construction and operation of the HIT-SI device. We thank Valerie Izzo for composing the original Taylor-state equilibrium calculation for the HIT-SI flux conserver, and George Marklin for many helpful discussions regarding Taylor states and modes in HIT-SI. We also thank the Los Alamos National Laboratory and Hyogo University (Japan) for equipment used in these experiments. This work is supported by the U.S. Department of Energy, Office of Fusion Energy Sciences.",

year = "2007",

month = jun,

doi = "10.1007/s10894-006-9049-y",

language = "English (US)",

volume = "26",

pages = "163--168",

journal = "Journal of Fusion Energy",

issn = "0164-0313",

publisher = "Springer New York",

number = "1-2",

}

TY - JOUR

T1 - Overview of the Helicity Injected Torus (HIT) program

AU - Redd, A. J.

AU - Jarboe, T. R.

AU - Hamp, W. T.

AU - Nelson, B. A.

AU - O'Neill, R. G.

AU - Sieck, P. E.

AU - Smith, R. J.

AU - Sutphin, G. L.

AU - Wrobel, J. S.

N1 - Funding Information: The authors thank John Rogers and George Andexler for their technical assistance in the design, construction and operation of the HIT-SI device. We thank Valerie Izzo for composing the original Taylor-state equilibrium calculation for the HIT-SI flux conserver, and George Marklin for many helpful discussions regarding Taylor states and modes in HIT-SI. We also thank the Los Alamos National Laboratory and Hyogo University (Japan) for equipment used in these experiments. This work is supported by the U.S. Department of Energy, Office of Fusion Energy Sciences.

PY - 2007/6

Y1 - 2007/6

N2 - The Helicity Injected Torus with Steady Inductive Helicity Injection (HIT-SI) consists of a "bowtie"-shaped axisymmetric confinement region, with two half-torus helicity injectors mounted on each side of the axisymmetric flux conserver [Sieck et al, IEEE Trans. Plasma Sci., v.33, p.723 (2005); Jarboe, Fusion Technology, v.36, p.85 (1999)]. Current and flux are driven sinusoidally with time in each injector, with the goal of generating and sustaining an axisymmetric spheromak in the main confinement region. Improvements in machine conditioning have enabled systematic study of HIT-SI discharges with significant toroidal current I TOR, including cases in which this current I TOR switches sign one or more times during the discharge. Statistical studies of all HIT-SI discharges to date demonstrate a minimum injected power to form significant I TOR, and that the maximum I TOR scales approximately linearly with the total injected power.

AB - The Helicity Injected Torus with Steady Inductive Helicity Injection (HIT-SI) consists of a "bowtie"-shaped axisymmetric confinement region, with two half-torus helicity injectors mounted on each side of the axisymmetric flux conserver [Sieck et al, IEEE Trans. Plasma Sci., v.33, p.723 (2005); Jarboe, Fusion Technology, v.36, p.85 (1999)]. Current and flux are driven sinusoidally with time in each injector, with the goal of generating and sustaining an axisymmetric spheromak in the main confinement region. Improvements in machine conditioning have enabled systematic study of HIT-SI discharges with significant toroidal current I TOR, including cases in which this current I TOR switches sign one or more times during the discharge. Statistical studies of all HIT-SI discharges to date demonstrate a minimum injected power to form significant I TOR, and that the maximum I TOR scales approximately linearly with the total injected power.

KW - Helicity injection current drive

KW - Magnetic confinement

KW - Spheromak

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JF - Journal of Fusion Energy

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ER -

Overview of the Helicity Injected Torus (HIT) program

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