Microwave imaging reflectometry for KSTAR

W. Lee; I. Hong; J. Leem; M. Kim; Y. Nam; G. S. Yun; H. K. Park; Y. G. Kim; K. W. Kim; C. W. Domier; N. C. Luhmann

doi:10.1088/1748-0221/7/01/C01070

Microwave imaging reflectometry for KSTAR

W. Lee, I. Hong, J. Leem, M. Kim, Y. Nam, G. S. Yun, H. K. Park, Y. G. Kim, K. W. Kim, C. W. Domier, N. C. Luhmann

School of Electronics Engineering

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

5 Scopus citations

Abstract

A microwave imaging reflectometry (MIR) system with two probing frequencies is being developed for 2D measurement of electron density fluctuations for KSTAR plasmas. The two-frequency probe beam enables simultaneous measurement of density fluctuations at two cut-off layers. Laboratory test of two approaches (reflective and refractive optics) has suggested an extreme care is needed in designing the optics considering problems such as aberration issues and standing waves. Currently, an optics based on refractive element is being designed with the minimum number of lens. The detector system consists of array detectors and electronics for the fluctuation phase reconstruction. The two-frequency MIR system will be installed for the 2012 KSTAR campaign and will be expanded to five frequencies by 2014.

Original language	English
Article number	C01070
Journal	Journal of Instrumentation
Volume	7
Issue number	1
DOIs	https://doi.org/10.1088/1748-0221/7/01/C01070
State	Published - Jan 2012

Keywords

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

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10.1088/1748-0221/7/01/C01070

Cite this

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abstract = "A microwave imaging reflectometry (MIR) system with two probing frequencies is being developed for 2D measurement of electron density fluctuations for KSTAR plasmas. The two-frequency probe beam enables simultaneous measurement of density fluctuations at two cut-off layers. Laboratory test of two approaches (reflective and refractive optics) has suggested an extreme care is needed in designing the optics considering problems such as aberration issues and standing waves. Currently, an optics based on refractive element is being designed with the minimum number of lens. The detector system consists of array detectors and electronics for the fluctuation phase reconstruction. The two-frequency MIR system will be installed for the 2012 KSTAR campaign and will be expanded to five frequencies by 2014.",

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

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AU - Lee, W.

AU - Hong, I.

AU - Leem, J.

AU - Kim, M.

AU - Nam, Y.

AU - Yun, G. S.

AU - Park, H. K.

AU - Kim, Y. G.

AU - Kim, K. W.

AU - Domier, C. W.

AU - Luhmann, N. C.

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AB - A microwave imaging reflectometry (MIR) system with two probing frequencies is being developed for 2D measurement of electron density fluctuations for KSTAR plasmas. The two-frequency probe beam enables simultaneous measurement of density fluctuations at two cut-off layers. Laboratory test of two approaches (reflective and refractive optics) has suggested an extreme care is needed in designing the optics considering problems such as aberration issues and standing waves. Currently, an optics based on refractive element is being designed with the minimum number of lens. The detector system consists of array detectors and electronics for the fluctuation phase reconstruction. The two-frequency MIR system will be installed for the 2012 KSTAR campaign and will be expanded to five frequencies by 2014.

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Microwave imaging reflectometry for KSTAR

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