Improved accuracy in the estimation of the tearing mode stability parameters (Δ′ and w c ) using 2D ECEI data in KSTAR

Minjun Choi; Gunsu Yun; Woochang Lee; Hyeon Park; Young-Seok Park; Steve  Sabbagh; Kieran Gibson; Christopher Bowman; Calvin Domier; Neville Luhmann; Jun-Gyo Bak; Sang Lee; KSTAR Team

doi:10.1088/0029-5515/54/8/083010

Improved accuracy in the estimation of the tearing mode stability parameters (Δ′ and w c ) using 2D ECEI data in KSTAR

Minjun Choi, Gunsu Yun, Woochang Lee, Hyeon Park, Young-Seok Park, Steve Sabbagh, Kieran Gibson, Christopher Bowman, Calvin Domier, Neville Luhmann, Jun-Gyo Bak, Sang Lee, KSTAR Team

Physics

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

Abstract

The accuracy in estimation of two important tearing mode stability parameters (Δ′ and w c ) is improved by employing two-dimensional (2D) ECE imaging data which help one to overcome the resolution limit of conventional one-dimensional data. The experimentally measured 2D images are directly compared with synthetic ones from a tearing mode T e model to estimate the parameters and an excellent agreement is achieved. The results imply that the observed tearing mode is classically stable but has non-negligible bootstrap current drive.

Original language	English
Pages (from-to)	83010
Number of pages	7
Journal	Nuclear fusion
Volume	54
Issue number	8
DOIs	https://doi.org/10.1088/0029-5515/54/8/083010
Publication status	Published - 3 Jun 2014

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10.1088/0029-5515/54/8/083010

http://stacks.iop.org/0029-5515/54/i=8/a=083010

Cite this

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title = "Improved accuracy in the estimation of the tearing mode stability parameters (Δ′ and w c ) using 2D ECEI data in KSTAR",

abstract = "The accuracy in estimation of two important tearing mode stability parameters (Δ′ and w c ) is improved by employing two-dimensional (2D) ECE imaging data which help one to overcome the resolution limit of conventional one-dimensional data. The experimentally measured 2D images are directly compared with synthetic ones from a tearing mode T e model to estimate the parameters and an excellent agreement is achieved. The results imply that the observed tearing mode is classically stable but has non-negligible bootstrap current drive.",

author = "Minjun Choi and Gunsu Yun and Woochang Lee and Hyeon Park and Young-Seok Park and Steve Sabbagh and Kieran Gibson and Christopher Bowman and Calvin Domier and Neville Luhmann and Jun-Gyo Bak and Sang Lee and {KSTAR Team}",

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doi = "10.1088/0029-5515/54/8/083010",

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T1 - Improved accuracy in the estimation of the tearing mode stability parameters (Δ′ and w c ) using 2D ECEI data in KSTAR

AU - Choi, Minjun

AU - Yun, Gunsu

AU - Lee, Woochang

AU - Park, Hyeon

AU - Park, Young-Seok

AU - Sabbagh, Steve

AU - Gibson, Kieran

AU - Bowman, Christopher

AU - Domier, Calvin

AU - Luhmann, Neville

AU - Bak, Jun-Gyo

AU - Lee, Sang

AU - KSTAR Team

PY - 2014/6/3

Y1 - 2014/6/3

N2 - The accuracy in estimation of two important tearing mode stability parameters (Δ′ and w c ) is improved by employing two-dimensional (2D) ECE imaging data which help one to overcome the resolution limit of conventional one-dimensional data. The experimentally measured 2D images are directly compared with synthetic ones from a tearing mode T e model to estimate the parameters and an excellent agreement is achieved. The results imply that the observed tearing mode is classically stable but has non-negligible bootstrap current drive.

AB - The accuracy in estimation of two important tearing mode stability parameters (Δ′ and w c ) is improved by employing two-dimensional (2D) ECE imaging data which help one to overcome the resolution limit of conventional one-dimensional data. The experimentally measured 2D images are directly compared with synthetic ones from a tearing mode T e model to estimate the parameters and an excellent agreement is achieved. The results imply that the observed tearing mode is classically stable but has non-negligible bootstrap current drive.

U2 - 10.1088/0029-5515/54/8/083010

DO - 10.1088/0029-5515/54/8/083010

M3 - Article

SN - 0029-5515

VL - 54

SP - 83010

JO - Nuclear fusion

JF - Nuclear fusion

IS - 8

ER -