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Electron cyclotron emission imaging system for 2D electron temperature fluctuation measurements in WEST.

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Title: Electron cyclotron emission imaging system for 2D electron temperature fluctuation measurements in WEST.
Authors: Lee, Woochang1 (AUTHOR) wclee@kfe.re.kr, Sabot, Roland2 (AUTHOR), Mazzi, Samuele2 (AUTHOR), Morales, Jorge2 (AUTHOR), Maget, Patrick2 (AUTHOR), Lee, Dong-Jae1 (AUTHOR), Lee, Jung-Seok3 (AUTHOR), Min, Byung-cheol3 (AUTHOR)
Source: Plasma Physics & Controlled Fusion. 2026, Vol. 68 Issue 4, p1-12. 12p.
Subjects: Magnetohydrodynamic instabilities, Plasma diagnostics, Plasma confinement, Magnetohydrodynamics, Tokamaks, Electron temperature measurement
Abstract: An electron cyclotron emission imaging (ECEI) system was developed and successfully commissioned on the WEST tokamak to perform 2D measurements of the electron temperature fluctuations. The system follows established ECEI configurations, utilizing a 24-channel detector array coupled with 192-channel intermediate frequency (IF)/video modules, a frequency-tunable local oscillator (LO) source, imaging and LO optics, and specialized quasi-optical filters. During the early commissioning phase, the system successfully captured the dynamical evolution of a strong magnetohydrodynamic (MHD) mode in the core of an ohmically heated L-mode plasma. By providing direct 2D visualization, the system enables a comprehensive characterization of the mode structure and its temporal behavior. These initial results confirm the effectiveness of the ECEI system as a crucial diagnostic tool for investigating complex MHD instabilities in WEST. [ABSTRACT FROM AUTHOR]
Copyright of Plasma Physics & Controlled Fusion is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 192699087
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Electron cyclotron emission imaging system for 2D electron temperature fluctuation measurements in WEST.
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  Data: <searchLink fieldCode="AR" term="%22Lee%2C+Woochang%22">Lee, Woochang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> wclee@kfe.re.kr</i><br /><searchLink fieldCode="AR" term="%22Sabot%2C+Roland%22">Sabot, Roland</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mazzi%2C+Samuele%22">Mazzi, Samuele</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Morales%2C+Jorge%22">Morales, Jorge</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Maget%2C+Patrick%22">Maget, Patrick</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lee%2C+Dong-Jae%22">Lee, Dong-Jae</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lee%2C+Jung-Seok%22">Lee, Jung-Seok</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Min%2C+Byung-cheol%22">Min, Byung-cheol</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Plasma+Physics+%26+Controlled+Fusion%22">Plasma Physics & Controlled Fusion</searchLink>. 2026, Vol. 68 Issue 4, p1-12. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Magnetohydrodynamic+instabilities%22">Magnetohydrodynamic instabilities</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+diagnostics%22">Plasma diagnostics</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+confinement%22">Plasma confinement</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetohydrodynamics%22">Magnetohydrodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Tokamaks%22">Tokamaks</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+temperature+measurement%22">Electron temperature measurement</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: An electron cyclotron emission imaging (ECEI) system was developed and successfully commissioned on the WEST tokamak to perform 2D measurements of the electron temperature fluctuations. The system follows established ECEI configurations, utilizing a 24-channel detector array coupled with 192-channel intermediate frequency (IF)/video modules, a frequency-tunable local oscillator (LO) source, imaging and LO optics, and specialized quasi-optical filters. During the early commissioning phase, the system successfully captured the dynamical evolution of a strong magnetohydrodynamic (MHD) mode in the core of an ohmically heated L-mode plasma. By providing direct 2D visualization, the system enables a comprehensive characterization of the mode structure and its temporal behavior. These initial results confirm the effectiveness of the ECEI system as a crucial diagnostic tool for investigating complex MHD instabilities in WEST. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Plasma Physics & Controlled Fusion is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1088/1361-6587/ae54c8
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      – Code: eng
        Text: English
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        PageCount: 12
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      – SubjectFull: Magnetohydrodynamic instabilities
        Type: general
      – SubjectFull: Plasma diagnostics
        Type: general
      – SubjectFull: Plasma confinement
        Type: general
      – SubjectFull: Magnetohydrodynamics
        Type: general
      – SubjectFull: Tokamaks
        Type: general
      – SubjectFull: Electron temperature measurement
        Type: general
    Titles:
      – TitleFull: Electron cyclotron emission imaging system for 2D electron temperature fluctuation measurements in WEST.
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            NameFull: Lee, Woochang
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            – D: 01
              M: 04
              Text: 2026
              Type: published
              Y: 2026
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