Investigation of the validity of quasilinear theory for electron Landau damping in a tokamak using a broad-band wave effect

Lee, Jungpyo; Bonoli, Paul; Wright, John

doi:10.1063/1.3541836

Title: Investigation of the validity of quasilinear theory for electron Landau damping in a tokamak using a broad-band wave effect

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3541836· OSTI ID:1076458

Lee, Jungpyo ^[1]; Bonoli, Paul ^[1]; Wright, John ^[1]

MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States)

The quasilinear diffusion coefficient assuming a constant magnetic field along the electron orbit is widely used to describe electron Landau damping of waves in a tokamak where the magnitude of the magnetic field varies on a flux surface. To understand the impact of violating the constant magnetic field assumption, we introduce the effect of a broad-bandwidth wave spectrum which has been used in the past to validate quasilinear theory for the fast decorrelation process between resonances. By the reevaluation of the diffusion coefficient through the level of the phase integral for the tokamak geometry with the broad-band wave effect included, we identify the three acceptable errors for the use of the quasilinear diffusion coefficient.

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Research Organization:: MIT (Massachusetts Inst. of Technology), Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FC02-99ER54512

OSTI ID:: 1076458

Journal Information:: Physics of Plasmas, Vol. 18, Issue 1; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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References (28)

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