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Director:
Prof. N.C. Luhmann, Jr.
Last update:
April 25, 2012
Comments to:
Web Master
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ECEI is inherently well suited to diagnosing MHD activity and interactions across multiple scales. Shown above are images from a single DIII-D discharge comparing the fine scale structure of an Alfvén eigenmode to meso-scale perturbations due to a core-localized kink instability. Covering a large region of the plasma in 2D, ECEI enables reconstruction of helically symmetric structures in the entire poloidal plane.
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Imaging the sawtooth crash at the inboard, or high field side, shows that thermal transport occurs along a localized conduction channel, consistent with a model for local magnetic reconnection. The hot plasma is carried leftward, across the temperature inversion radius, and ejected from the tokamak core. The image is unambiguous, composed of localized measurements, and is not subject to the uncertainties associated with the inversion of line integrated measurements. |
ECE-Imaging systems acquire data with micro-second resolution, allowing for accurate discrimination among coupled and closely spaced eigenmodes. In this case, the linear superposition of two separate Alfvén eigenmodes produces a complicated structure. But, the quality of ECEI data allows these modes to be imaged separately for better understanding of their linear and non-linear stability properties. |
NEWS and PRESENTATIONS
- Liubing Yu, "Electronics Characterization and Data Correction for Far Infrared
Tangential Interferometry and Polarimetry (FIReTIP on NSTX)," TTF 2012 U.S. TransportTask Force Workshop, April 6-10, 2012.
- Anisullah Baig, "Simulation Analysis of Nano-CNC Fabricated 220 GHz Ultra Wide Band TWTA," 13th International Vacuum Electronics Conference (IVEC2012) April 24-26, 2012.
- Robert Barchfeld, "Nano CNC Milling of Two Different Designs of 0.22 THz TWT Circuits," 13th International Vacuum Electronics Conference (IVEC2012) April 24-26, 2012.
- Dr. Jinfeng Zhao, "Scandate-Added Tungsten Dispenser Cathode Fabrication for 220 GHz Sheet Beam Traveling Wave Tube Amplifier,"13th International Vacuum Electronics Conference (IVEC2012) April 24-26, 2012.
- Dr. Benjamin Tobias, (Invited Talk), "ECE-Imaging of the H-Mode Pedestal," 19th Topical Conference High-Temperature Plasma Diagnostics, (HTPD2012) May 6-10, 2012.
- Prof. N.C. Luhmann, Jr., "Electron Cyclotron Emission Imaging on KSTAR," 19th Topical Conference High-Temperature Plasma Diagnostics, (HTPD2012) May 6-10, 2012.
- Xiaoxin Ren, "Simulation of an Expanded, Robust Operating Space for Density Fluctuation Measurements by 2D Imaging Reflectometry," 19th Topical Conference High-Temperature Plasma Diagnostics, (HTPD2012) May 6-10, 2012.
- Dr. Calvin Domier, "Electron Cyclotron Emission Diagnostics for EAST," 19th Topical Conference High-Temperature Plasma Diagnostics, (HTPD2012) May 6-10, 2012.
- Dr. Benjamin Tobias, "Microwave Imaging Reflectometry from Concept to Construction: The Role of Modeling and Laboratory CHaracterization in Diagnostic Development," 39th International Conf. on Plasma Science, July 8-12, 2012.
RESEARCH ACTIVITIES
- Plasma Diagnostics
- Microwave/Millimeter Vacuum Electronics
- Microwave and Millimeter Wave Solid State Technology
- Advanced Accelerators and Light Sources (Reference Only)
- Medical Technologies and Applications (Reference Only)
- Microwave Plasma Interaction (Reference Only)
- MURI 04: NanoPhysics of Electron Dynamics near Surfaces in High Power Microwave Devices and Systems (Reference Only)
- MURI 99 (Reference Only)
- MURI 95 (Reference Only)
Copyright 2012, The Millimeter-Wave Technology Group of the
University of California at Davis
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Microwave/Millimeter Wave Technology