Observation of Velocity-Independent Electron Transport in the Reversed Field Pinch

R. O’Connell; D. J.Den Hartog; C. B. Forest; J. K. Anderson; T. M. Biewer; B. E. Chapman; D. Craig; G. Fiksel; S. C. Prager; J. S. Sarff; S. D. Terry; R. W. Harvey

doi:10.1103/PhysRevLett.91.045002

Observation of Velocity-Independent Electron Transport in the Reversed Field Pinch

R. O’Connell
, D. J.Den Hartog
, C. B. Forest
, J. K. Anderson
, T. M. Biewer
, B. E. Chapman
, D. Craig
, G. Fiksel
, S. C. Prager
, J. S. Sarff
, S. D. Terry
, R. W. Harvey

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

37 Scopus citations

Abstract

Confinement of runaway electrons has been observed for the first time in a reversed field pinch during improved-confinement plasmas in the Madison Symmetric Torus. Energy-resolved hard-x-ray flux measurements have been used to determine the velocity dependence of the electron diffusion coefficient, utilizing computational solutions of the Fokker-Planck transport equation. With improved-confinement, the fast electron diffusivity drops by 2 orders of magnitude and is independent of velocity. This suggests a change in the transport mechanism away from stochastic magnetic field diffusion.

Original language	English (US)
Journal	Physical review letters
Volume	91
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.91.045002
State	Published - Jul 24 2003

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.91.045002

Cite this

@article{72da223404be445eb45b539eb99a5e53,

title = "Observation of Velocity-Independent Electron Transport in the Reversed Field Pinch",

abstract = "Confinement of runaway electrons has been observed for the first time in a reversed field pinch during improved-confinement plasmas in the Madison Symmetric Torus. Energy-resolved hard-x-ray flux measurements have been used to determine the velocity dependence of the electron diffusion coefficient, utilizing computational solutions of the Fokker-Planck transport equation. With improved-confinement, the fast electron diffusivity drops by 2 orders of magnitude and is independent of velocity. This suggests a change in the transport mechanism away from stochastic magnetic field diffusion.",

author = "R. O{\textquoteright}Connell and Hartog, \{D. J.Den\} and Forest, \{C. B.\} and Anderson, \{J. K.\} and Biewer, \{T. M.\} and Chapman, \{B. E.\} and D. Craig and G. Fiksel and Prager, \{S. C.\} and Sarff, \{J. S.\} and Terry, \{S. D.\} and Harvey, \{R. W.\}",

note = "Funding Information: This work was supported by the U.S. Department of Energy. The authors wish to recognize the many contributions of the UW-Madison MST group, including collaborators from UCLA; David Brower and Weixing Ding and CEA Cadarache; Yves Peysson and L{\'e}na Delpech.",

year = "2003",

month = jul,

day = "24",

doi = "10.1103/PhysRevLett.91.045002",

language = "English (US)",

volume = "91",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "4",

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TY - JOUR

T1 - Observation of Velocity-Independent Electron Transport in the Reversed Field Pinch

AU - O’Connell, R.

AU - Hartog, D. J.Den

AU - Forest, C. B.

AU - Anderson, J. K.

AU - Biewer, T. M.

AU - Chapman, B. E.

AU - Craig, D.

AU - Fiksel, G.

AU - Prager, S. C.

AU - Sarff, J. S.

AU - Terry, S. D.

AU - Harvey, R. W.

N1 - Funding Information: This work was supported by the U.S. Department of Energy. The authors wish to recognize the many contributions of the UW-Madison MST group, including collaborators from UCLA; David Brower and Weixing Ding and CEA Cadarache; Yves Peysson and Léna Delpech.

PY - 2003/7/24

Y1 - 2003/7/24

N2 - Confinement of runaway electrons has been observed for the first time in a reversed field pinch during improved-confinement plasmas in the Madison Symmetric Torus. Energy-resolved hard-x-ray flux measurements have been used to determine the velocity dependence of the electron diffusion coefficient, utilizing computational solutions of the Fokker-Planck transport equation. With improved-confinement, the fast electron diffusivity drops by 2 orders of magnitude and is independent of velocity. This suggests a change in the transport mechanism away from stochastic magnetic field diffusion.

AB - Confinement of runaway electrons has been observed for the first time in a reversed field pinch during improved-confinement plasmas in the Madison Symmetric Torus. Energy-resolved hard-x-ray flux measurements have been used to determine the velocity dependence of the electron diffusion coefficient, utilizing computational solutions of the Fokker-Planck transport equation. With improved-confinement, the fast electron diffusivity drops by 2 orders of magnitude and is independent of velocity. This suggests a change in the transport mechanism away from stochastic magnetic field diffusion.

UR - https://www.scopus.com/pages/publications/17544392009

UR - https://www.scopus.com/pages/publications/17544392009#tab=citedBy

U2 - 10.1103/PhysRevLett.91.045002

DO - 10.1103/PhysRevLett.91.045002

M3 - Article

C2 - 12906668

AN - SCOPUS:17544392009

SN - 0031-9007

VL - 91

JO - Physical review letters

JF - Physical review letters

IS - 4

ER -

Observation of Velocity-Independent Electron Transport in the Reversed Field Pinch

Abstract

All Science Journal Classification (ASJC) codes

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