Thermal imaging of plasma with a phased array antenna in QUEST

Kishore Mishra; H. Idei; H. Zushi; K. Nagata; R. Akimoto; M. K. Yamamoto; K. Hanada; M. Hasegawa; K. Nakamura; A. Fujisawa; Y. Nagashima; S. Banerjee; T. Onchi; A. Kuzmin

doi:10.1063/1.4889903

Thermal imaging of plasma with a phased array antenna in QUEST

Kishore Mishra, H. Idei, H. Zushi, K. Nagata, R. Akimoto, M. K. Yamamoto, K. Hanada, M. Hasegawa, K. Nakamura, A. Fujisawa, Y. Nagashima, S. Banerjee, T. Onchi, A. Kuzmin

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

8 Scopus citations

Abstract

A thermal imaging system to measure plasma Electron Bernstein Emission (EBE) emanating from the mode conversion region in overdense plasma is discussed. Unlike conventional ECE/EBE imaging, this diagnostics does not employ any active mechanical scanning mirrors or focusing optics to scan for the emission cones in plasma. Instead, a standard 3 × 3 waveguide array antenna is used as a passive receiver to collect emission from plasma and imaging reconstruction is done by accurate measurements of phase and intensity of these signals by heterodyne detection technique. A broadband noise source simulating the EBE, is installed near the expected mode conversion region and its position is successfully reconstructed using phase array technique which is done in post processing.

Original language	English (US)
Article number	11E808
Journal	Review of Scientific Instruments
Volume	85
Issue number	11
DOIs	https://doi.org/10.1063/1.4889903
State	Published - Nov 2014
Externally published	Yes

All Science Journal Classification (ASJC) codes

Instrumentation

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10.1063/1.4889903

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title = "Thermal imaging of plasma with a phased array antenna in QUEST",

abstract = "A thermal imaging system to measure plasma Electron Bernstein Emission (EBE) emanating from the mode conversion region in overdense plasma is discussed. Unlike conventional ECE/EBE imaging, this diagnostics does not employ any active mechanical scanning mirrors or focusing optics to scan for the emission cones in plasma. Instead, a standard 3 × 3 waveguide array antenna is used as a passive receiver to collect emission from plasma and imaging reconstruction is done by accurate measurements of phase and intensity of these signals by heterodyne detection technique. A broadband noise source simulating the EBE, is installed near the expected mode conversion region and its position is successfully reconstructed using phase array technique which is done in post processing.",

author = "Kishore Mishra and H. Idei and H. Zushi and K. Nagata and R. Akimoto and Yamamoto, \{M. K.\} and K. Hanada and M. Hasegawa and K. Nakamura and A. Fujisawa and Y. Nagashima and S. Banerjee and T. Onchi and A. Kuzmin",

year = "2014",

month = nov,

doi = "10.1063/1.4889903",

language = "English (US)",

volume = "85",

journal = "Review of Scientific Instruments",

issn = "0034-6748",

publisher = "American Institute of Physics",

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T1 - Thermal imaging of plasma with a phased array antenna in QUEST

AU - Mishra, Kishore

AU - Idei, H.

AU - Zushi, H.

AU - Nagata, K.

AU - Akimoto, R.

AU - Yamamoto, M. K.

AU - Hanada, K.

AU - Hasegawa, M.

AU - Nakamura, K.

AU - Fujisawa, A.

AU - Nagashima, Y.

AU - Banerjee, S.

AU - Onchi, T.

AU - Kuzmin, A.

PY - 2014/11

Y1 - 2014/11

N2 - A thermal imaging system to measure plasma Electron Bernstein Emission (EBE) emanating from the mode conversion region in overdense plasma is discussed. Unlike conventional ECE/EBE imaging, this diagnostics does not employ any active mechanical scanning mirrors or focusing optics to scan for the emission cones in plasma. Instead, a standard 3 × 3 waveguide array antenna is used as a passive receiver to collect emission from plasma and imaging reconstruction is done by accurate measurements of phase and intensity of these signals by heterodyne detection technique. A broadband noise source simulating the EBE, is installed near the expected mode conversion region and its position is successfully reconstructed using phase array technique which is done in post processing.

AB - A thermal imaging system to measure plasma Electron Bernstein Emission (EBE) emanating from the mode conversion region in overdense plasma is discussed. Unlike conventional ECE/EBE imaging, this diagnostics does not employ any active mechanical scanning mirrors or focusing optics to scan for the emission cones in plasma. Instead, a standard 3 × 3 waveguide array antenna is used as a passive receiver to collect emission from plasma and imaging reconstruction is done by accurate measurements of phase and intensity of these signals by heterodyne detection technique. A broadband noise source simulating the EBE, is installed near the expected mode conversion region and its position is successfully reconstructed using phase array technique which is done in post processing.

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DO - 10.1063/1.4889903

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VL - 85

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 11

M1 - 11E808

ER -

Thermal imaging of plasma with a phased array antenna in QUEST

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