Low-noise heterodyne receiver for electron cyclotron emission imaging and microwave imaging reflectometry

Tobias, B.; Domier, C. W.; Luhmann, Jr., N. C.; Luo, C.; Mamidanna, M.; Phan, T.; Pham, A. -V.; Wang, Y.

doi:10.1063/1.4959273

Title: Low-noise heterodyne receiver for electron cyclotron emission imaging and microwave imaging reflectometry

Journal Article · Mon Jul 25 00:00:00 EDT 2016 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4959273· OSTI ID:1340112

Tobias, B. ^[1];

^[2]; Luhmann, Jr., N. C. ^[2]; Luo, C. ^[2]; Mamidanna, M. ^[2]; Phan, T. ^[2]; Pham, A. -V. ^[2]; Wang, Y. ^[2]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Univ. of California, Davis, CA (United States)

The critical component enabling electron cyclotron emission imaging (ECEI) and microwave imaging reflectometry (MIR) to resolve 2D and 3D electron temperature and density perturbations is the heterodyne imaging array that collects and downconverts radiated emission and/or reflected signals (50-150 GHz) to an intermediate frequency (IF) band (e.g. 0.1-18 GHz) that can be transmitted by a shielded coaxial cable for further filtering and detection. New circuitry has been developed for this task, integrating gallium arsenide (GaAs) monolithic microwave integrated circuits (MMICs) mounted on a liquid crystal polymer (LCP) substrate. The improved topology significantly increases electromagnetic shielding from out-of-band interference, leads to 10x improvement in the signal-to-noise ratio, and dramatic cost savings through integration. The current design, optimized for reflectometry and edge radiometry on mid-sized tokamaks, has demonstrated >20 dB conversion gain in upper V-band (60-75 GHz). As a result, implementation of the circuit in a multi-channel electron cyclotron emission imaging (ECEI) array will improve the diagnosis of edge-localized modes and fluctuations of the high-confinement, or H-mode, pedestal.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: University of California at Davis, Davis, California 95616, USA

Grant/Contract Number:: AC02-09CH11466; FG02-99ER54531

OSTI ID:: 1340112

Report Number(s):: 5274; RSINAK; TRN: US1701766

Journal Information:: Review of Scientific Instruments, Vol. 87, Issue 11; Conference: 21st Topical Conference on High-Temperature Plasma Diagnostics, Madison, WI (United States), 5-9 Jun 2016; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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References (13)

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Cited By (2)

Liquid crystal polymer receiver modules for electron cyclotron emission imaging on the DIII-D tokamak Zhu, Y.; Ye, Y.; Yu, J-H. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5035373	journal	October 2018
Millimeter-wave system-on-chip advancement for fusion plasma diagnostics Yu, J. -H.; Chang, Y. -T.; Lin, K. -Y. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5035559	journal	October 2018

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