Measurements of radial profiles of He2+ transport coefficients on the TFTR tokamak

E. J. Synakowski; B. C. Stratton; P. C. Efthimion; R. J. Fonck; R. A. Hulse; D. W. Johnson; D. K. Mansfield; H. Park; S. D. Scott; G. Taylor

doi:10.1103/PhysRevLett.65.2255

Measurements of radial profiles of He2+ transport coefficients on the TFTR tokamak

E. J. Synakowski, B. C. Stratton, P. C. Efthimion, R. J. Fonck, R. A. Hulse, D. W. Johnson, D. K. Mansfield, H. Park, S. D. Scott, G. Taylor

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58 Scopus citations

Abstract

Measurements of the spatial structure of the transport coefficients of He2+ on the Tokamak Fusion Test Reactor is reported. He2+ profiles were measured using charge-exchange spectroscopy after a helium puff into corotating L-mode plasmas. Modeling shows that the He2+ diffusivity is about 10 m2/s near the plasma edge and drops to below 1 m2/s inside of the q=1 surface. The convective velocity ranges from 13 m/s near q=1 to 2040 m/s near the edge. The helium diffusivity is on the order of the ion momentum and thermal diffusivity and is greater than the electron thermal diffusivity.

Original language	English (US)
Pages (from-to)	2255-2258
Number of pages	4
Journal	Physical review letters
Volume	65
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.65.2255
State	Published - 1990

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.65.2255

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title = "Measurements of radial profiles of He2+ transport coefficients on the TFTR tokamak",

abstract = "Measurements of the spatial structure of the transport coefficients of He2+ on the Tokamak Fusion Test Reactor is reported. He2+ profiles were measured using charge-exchange spectroscopy after a helium puff into corotating L-mode plasmas. Modeling shows that the He2+ diffusivity is about 10 m2/s near the plasma edge and drops to below 1 m2/s inside of the q=1 surface. The convective velocity ranges from 13 m/s near q=1 to 2040 m/s near the edge. The helium diffusivity is on the order of the ion momentum and thermal diffusivity and is greater than the electron thermal diffusivity.",

author = "Synakowski, \{E. J.\} and Stratton, \{B. C.\} and Efthimion, \{P. C.\} and Fonck, \{R. J.\} and Hulse, \{R. A.\} and Johnson, \{D. W.\} and Mansfield, \{D. K.\} and H. Park and Scott, \{S. D.\} and G. Taylor",

year = "1990",

doi = "10.1103/PhysRevLett.65.2255",

language = "English (US)",

volume = "65",

pages = "2255--2258",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "18",

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TY - JOUR

T1 - Measurements of radial profiles of He2+ transport coefficients on the TFTR tokamak

AU - Synakowski, E. J.

AU - Stratton, B. C.

AU - Efthimion, P. C.

AU - Fonck, R. J.

AU - Hulse, R. A.

AU - Johnson, D. W.

AU - Mansfield, D. K.

AU - Park, H.

AU - Scott, S. D.

AU - Taylor, G.

PY - 1990

Y1 - 1990

N2 - Measurements of the spatial structure of the transport coefficients of He2+ on the Tokamak Fusion Test Reactor is reported. He2+ profiles were measured using charge-exchange spectroscopy after a helium puff into corotating L-mode plasmas. Modeling shows that the He2+ diffusivity is about 10 m2/s near the plasma edge and drops to below 1 m2/s inside of the q=1 surface. The convective velocity ranges from 13 m/s near q=1 to 2040 m/s near the edge. The helium diffusivity is on the order of the ion momentum and thermal diffusivity and is greater than the electron thermal diffusivity.

AB - Measurements of the spatial structure of the transport coefficients of He2+ on the Tokamak Fusion Test Reactor is reported. He2+ profiles were measured using charge-exchange spectroscopy after a helium puff into corotating L-mode plasmas. Modeling shows that the He2+ diffusivity is about 10 m2/s near the plasma edge and drops to below 1 m2/s inside of the q=1 surface. The convective velocity ranges from 13 m/s near q=1 to 2040 m/s near the edge. The helium diffusivity is on the order of the ion momentum and thermal diffusivity and is greater than the electron thermal diffusivity.

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DO - 10.1103/PhysRevLett.65.2255

M3 - Article

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EP - 2258

JO - Physical review letters

JF - Physical review letters

IS - 18

ER -

Measurements of radial profiles of He2+ transport coefficients on the TFTR tokamak

Abstract

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