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 journalArticlepeer-review

7 Citations (Scopus)

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 languageEnglish
Article number11E808
JournalReview of Scientific Instruments
Volume85
Issue number11
DOIs
Publication statusPublished - Nov 2014

All Science Journal Classification (ASJC) codes

  • Instrumentation

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