Experimental and Theoretical Study of Quasicoherent Fluctuations in Enhanced [Formula presented] Plasmas in the Alcator C-Mod Tokamak

A. Mazurenko; M. Porkolab; D. Mossessian; J. A. Snipes; X. Q. Xu; W. M. Nevins

doi:10.1103/PhysRevLett.89.225004

Experimental and Theoretical Study of Quasicoherent Fluctuations in Enhanced [Formula presented] Plasmas in the Alcator C-Mod Tokamak

A. Mazurenko, M. Porkolab, D. Mossessian, J. A. Snipes, X. Q. Xu, W. M. Nevins

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

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Abstract

A comparison of experimental measurements and theoretical studies of the quasicoherent (QC) mode, observed at high densities during enhanced [Formula presented] (EDA) [Formula presented] mode in the Alcator C-Mod tokamak, are reported. The QC mode is a high frequency ([Formula presented]) nearly sinusoidal fluctuation in density and magnetic field, localized in the steep density gradient (“pedestal”) at the plasma edge, with typical wave numbers [Formula presented], [Formula presented] (midplane). It is proposed here that the QC mode is a form of resistive ballooning mode known as the resistive [Formula presented]-point mode, in reasonable agreement with predictions by the BOUT (boundary-plasma turbulence) code.

Original language	English (US)
Journal	Physical review letters
Volume	89
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.89.225004
State	Published - 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.89.225004

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title = "Experimental and Theoretical Study of Quasicoherent Fluctuations in Enhanced [Formula presented] Plasmas in the Alcator C-Mod Tokamak",

abstract = "A comparison of experimental measurements and theoretical studies of the quasicoherent (QC) mode, observed at high densities during enhanced [Formula presented] (EDA) [Formula presented] mode in the Alcator C-Mod tokamak, are reported. The QC mode is a high frequency ([Formula presented]) nearly sinusoidal fluctuation in density and magnetic field, localized in the steep density gradient (“pedestal”) at the plasma edge, with typical wave numbers [Formula presented], [Formula presented] (midplane). It is proposed here that the QC mode is a form of resistive ballooning mode known as the resistive [Formula presented]-point mode, in reasonable agreement with predictions by the BOUT (boundary-plasma turbulence) code.",

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year = "2002",

doi = "10.1103/PhysRevLett.89.225004",

language = "English (US)",

volume = "89",

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publisher = "American Physical Society",

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T1 - Experimental and Theoretical Study of Quasicoherent Fluctuations in Enhanced [Formula presented] Plasmas in the Alcator C-Mod Tokamak

AU - Mazurenko, A.

AU - Porkolab, M.

AU - Mossessian, D.

AU - Snipes, J. A.

AU - Xu, X. Q.

AU - Nevins, W. M.

PY - 2002

Y1 - 2002

N2 - A comparison of experimental measurements and theoretical studies of the quasicoherent (QC) mode, observed at high densities during enhanced [Formula presented] (EDA) [Formula presented] mode in the Alcator C-Mod tokamak, are reported. The QC mode is a high frequency ([Formula presented]) nearly sinusoidal fluctuation in density and magnetic field, localized in the steep density gradient (“pedestal”) at the plasma edge, with typical wave numbers [Formula presented], [Formula presented] (midplane). It is proposed here that the QC mode is a form of resistive ballooning mode known as the resistive [Formula presented]-point mode, in reasonable agreement with predictions by the BOUT (boundary-plasma turbulence) code.

AB - A comparison of experimental measurements and theoretical studies of the quasicoherent (QC) mode, observed at high densities during enhanced [Formula presented] (EDA) [Formula presented] mode in the Alcator C-Mod tokamak, are reported. The QC mode is a high frequency ([Formula presented]) nearly sinusoidal fluctuation in density and magnetic field, localized in the steep density gradient (“pedestal”) at the plasma edge, with typical wave numbers [Formula presented], [Formula presented] (midplane). It is proposed here that the QC mode is a form of resistive ballooning mode known as the resistive [Formula presented]-point mode, in reasonable agreement with predictions by the BOUT (boundary-plasma turbulence) code.

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Experimental and Theoretical Study of Quasicoherent Fluctuations in Enhanced [Formula presented] Plasmas in the Alcator C-Mod Tokamak

Abstract

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