Achievement of record β in the START spherical tokamak

M. Gryaznevich; R. Akers; P. G. Carolan; N. J. Conway; D. Gates; A. R. Field; T. C. Hender; I. Jenkins; R. Martin; M. P.S. Nightingale; C. Ribeiro; D. C. Robinson; A. Sykes; M. Tournianski; M. Valovič; M. J. Walsh

doi:10.1103/PhysRevLett.80.3972

Achievement of record β in the START spherical tokamak

M. Gryaznevich, R. Akers, P. G. Carolan, N. J. Conway, D. Gates, A. R. Field, T. C. Hender, I. Jenkins, R. Martin, M. P.S. Nightingale, C. Ribeiro, D. C. Robinson, A. Sykes, M. Tournianski, M. Valovič, M. J. Walsh

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

129 Scopus citations

Abstract

Values of βr ≤ 30% have been achieved and sustained for several confinement times on the START spherical tokamak using additional heating provided by neutral beam injection. These values are more than twice the highest value previously obtained in a tokamak, and correspond to normalized β values of β_≥ 4. In these shots values of I_P > I_rod (where I_rod is the current flowing in the central toroidal field rod) have been obtained, which are considered to be necessary for spherical tokamak power plant. The results are compared with ideal-MHD stability theory.

Original language	English (US)
Pages (from-to)	3972-3975
Number of pages	4
Journal	Physical review letters
Volume	80
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.80.3972
State	Published - 1998
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.80.3972

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Gryaznevich, M., Akers, R., Carolan, P. G., Conway, N. J., Gates, D., Field, A. R., Hender, T. C., Jenkins, I., Martin, R., Nightingale, M. P. S., Ribeiro, C., Robinson, D. C., Sykes, A., Tournianski, M., Valovič, M., & Walsh, M. J. (1998). Achievement of record β in the START spherical tokamak. Physical review letters, 80(18), 3972-3975. https://doi.org/10.1103/PhysRevLett.80.3972

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title = "Achievement of record β in the START spherical tokamak",

abstract = "Values of βr ≤ 30\% have been achieved and sustained for several confinement times on the START spherical tokamak using additional heating provided by neutral beam injection. These values are more than twice the highest value previously obtained in a tokamak, and correspond to normalized β values of β≥ 4. In these shots values of IP > Irod (where Irod is the current flowing in the central toroidal field rod) have been obtained, which are considered to be necessary for spherical tokamak power plant. The results are compared with ideal-MHD stability theory.",

author = "M. Gryaznevich and R. Akers and Carolan, \{P. G.\} and Conway, \{N. J.\} and D. Gates and Field, \{A. R.\} and Hender, \{T. C.\} and I. Jenkins and R. Martin and Nightingale, \{M. P.S.\} and C. Ribeiro and Robinson, \{D. C.\} and A. Sykes and M. Tournianski and M. Valovi{\v c} and Walsh, \{M. J.\}",

year = "1998",

doi = "10.1103/PhysRevLett.80.3972",

language = "English (US)",

volume = "80",

pages = "3972--3975",

journal = "Physical review letters",

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TY - JOUR

T1 - Achievement of record β in the START spherical tokamak

AU - Gryaznevich, M.

AU - Akers, R.

AU - Carolan, P. G.

AU - Conway, N. J.

AU - Gates, D.

AU - Field, A. R.

AU - Hender, T. C.

AU - Jenkins, I.

AU - Martin, R.

AU - Nightingale, M. P.S.

AU - Ribeiro, C.

AU - Robinson, D. C.

AU - Sykes, A.

AU - Tournianski, M.

AU - Valovič, M.

AU - Walsh, M. J.

PY - 1998

Y1 - 1998

N2 - Values of βr ≤ 30% have been achieved and sustained for several confinement times on the START spherical tokamak using additional heating provided by neutral beam injection. These values are more than twice the highest value previously obtained in a tokamak, and correspond to normalized β values of β≥ 4. In these shots values of IP > Irod (where Irod is the current flowing in the central toroidal field rod) have been obtained, which are considered to be necessary for spherical tokamak power plant. The results are compared with ideal-MHD stability theory.

AB - Values of βr ≤ 30% have been achieved and sustained for several confinement times on the START spherical tokamak using additional heating provided by neutral beam injection. These values are more than twice the highest value previously obtained in a tokamak, and correspond to normalized β values of β≥ 4. In these shots values of IP > Irod (where Irod is the current flowing in the central toroidal field rod) have been obtained, which are considered to be necessary for spherical tokamak power plant. The results are compared with ideal-MHD stability theory.

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U2 - 10.1103/PhysRevLett.80.3972

DO - 10.1103/PhysRevLett.80.3972

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VL - 80

SP - 3972

EP - 3975

JO - Physical review letters

JF - Physical review letters

IS - 18

ER -

Achievement of record β in the START spherical tokamak

Abstract

All Science Journal Classification (ASJC) codes

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