Poloidal rotation velocity measurement with an MIR system on KSTAR

W. Lee; J. Leem; G. S. Yun; H. K. Park; J. A. Lee; Y. B. Nam; Y. U. Nam; W. H. Ko; J. H. Jeong; Y. S. Bae; H. Park; K. W. Kim; C. W. Domier; N. C. Luhmann

doi:10.1088/1748-0221/8/10/C10018

Poloidal rotation velocity measurement with an MIR system on KSTAR

W. Lee, J. Leem, G. S. Yun, H. K. Park, J. A. Lee, Y. B. Nam, Y. U. Nam, W. H. Ko, J. H. Jeong, Y. S. Bae, H. Park, K. W. Kim, C. W. Domier, N. C. Luhmann

School of Electronics Engineering

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

10 Scopus citations

Abstract

A multi-channel microwave imaging reflectometry (MIR) system has been commissioned in the 2012 and 2013 KSTAR campaigns for the measurement of semi 2D (16 poloidal and 2 radial channels) electron density fluctuations for transport study on KSTAR. A time delayed cross correlation analysis among 16 poloidal channels has been applied to obtain the poloidal rotation velocities of the measured turbulent density fluctuations. The measured poloidal rotation directions for an 170 GHz ECH assisted ohmic plasma was in opposite direction to that of a neutral beam (NB) heated L-mode plasma. This is due to the fact that the intrinsic toroidal rotation in ohmic plasma (counter-clockwise) is in opposite direction to the NB heated plasma (clockwise) with respect to the plasma current direction.

Original language	English
Article number	C10018
Journal	Journal of Instrumentation
Volume	8
Issue number	10
DOIs	https://doi.org/10.1088/1748-0221/8/10/C10018
State	Published - Oct 2013

Keywords

Nuclear instruments and methods for hot plasma diagnostics
Plasma diagnostics - interferometry
spectroscopy and imaging

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10.1088/1748-0221/8/10/C10018

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title = "Poloidal rotation velocity measurement with an MIR system on KSTAR",

abstract = "A multi-channel microwave imaging reflectometry (MIR) system has been commissioned in the 2012 and 2013 KSTAR campaigns for the measurement of semi 2D (16 poloidal and 2 radial channels) electron density fluctuations for transport study on KSTAR. A time delayed cross correlation analysis among 16 poloidal channels has been applied to obtain the poloidal rotation velocities of the measured turbulent density fluctuations. The measured poloidal rotation directions for an 170 GHz ECH assisted ohmic plasma was in opposite direction to that of a neutral beam (NB) heated L-mode plasma. This is due to the fact that the intrinsic toroidal rotation in ohmic plasma (counter-clockwise) is in opposite direction to the NB heated plasma (clockwise) with respect to the plasma current direction.",

keywords = "Nuclear instruments and methods for hot plasma diagnostics, Plasma diagnostics - interferometry, spectroscopy and imaging",

author = "W. Lee and J. Leem and Yun, {G. S.} and Park, {H. K.} and Lee, {J. A.} and Nam, {Y. B.} and Nam, {Y. U.} and Ko, {W. H.} and Jeong, {J. H.} and Bae, {Y. S.} and H. Park and Kim, {K. W.} and Domier, {C. W.} and Luhmann, {N. C.}",

year = "2013",

month = oct,

doi = "10.1088/1748-0221/8/10/C10018",

language = "English",

volume = "8",

journal = "Journal of Instrumentation",

issn = "1748-0221",

publisher = "IOP Publishing Ltd.",

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TY - JOUR

T1 - Poloidal rotation velocity measurement with an MIR system on KSTAR

AU - Lee, W.

AU - Leem, J.

AU - Yun, G. S.

AU - Park, H. K.

AU - Lee, J. A.

AU - Nam, Y. B.

AU - Nam, Y. U.

AU - Ko, W. H.

AU - Jeong, J. H.

AU - Bae, Y. S.

AU - Park, H.

AU - Kim, K. W.

AU - Domier, C. W.

AU - Luhmann, N. C.

PY - 2013/10

Y1 - 2013/10

N2 - A multi-channel microwave imaging reflectometry (MIR) system has been commissioned in the 2012 and 2013 KSTAR campaigns for the measurement of semi 2D (16 poloidal and 2 radial channels) electron density fluctuations for transport study on KSTAR. A time delayed cross correlation analysis among 16 poloidal channels has been applied to obtain the poloidal rotation velocities of the measured turbulent density fluctuations. The measured poloidal rotation directions for an 170 GHz ECH assisted ohmic plasma was in opposite direction to that of a neutral beam (NB) heated L-mode plasma. This is due to the fact that the intrinsic toroidal rotation in ohmic plasma (counter-clockwise) is in opposite direction to the NB heated plasma (clockwise) with respect to the plasma current direction.

AB - A multi-channel microwave imaging reflectometry (MIR) system has been commissioned in the 2012 and 2013 KSTAR campaigns for the measurement of semi 2D (16 poloidal and 2 radial channels) electron density fluctuations for transport study on KSTAR. A time delayed cross correlation analysis among 16 poloidal channels has been applied to obtain the poloidal rotation velocities of the measured turbulent density fluctuations. The measured poloidal rotation directions for an 170 GHz ECH assisted ohmic plasma was in opposite direction to that of a neutral beam (NB) heated L-mode plasma. This is due to the fact that the intrinsic toroidal rotation in ohmic plasma (counter-clockwise) is in opposite direction to the NB heated plasma (clockwise) with respect to the plasma current direction.

KW - Nuclear instruments and methods for hot plasma diagnostics

KW - Plasma diagnostics - interferometry

KW - spectroscopy and imaging

UR - http://www.scopus.com/inward/record.url?scp=84887119503&partnerID=8YFLogxK

U2 - 10.1088/1748-0221/8/10/C10018

DO - 10.1088/1748-0221/8/10/C10018

M3 - Article

AN - SCOPUS:84887119503

SN - 1748-0221

VL - 8

JO - Journal of Instrumentation

JF - Journal of Instrumentation

IS - 10

M1 - C10018

ER -

Poloidal rotation velocity measurement with an MIR system on KSTAR

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Keywords

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