Radio frequency measurements of energetic-particle-driven emission using the ion cyclotron emission diagnostic on the DIII-D tokamak

The Ion Cyclotron Emission (ICE) diagnostic on the DIII-D tokamak consists of two outboard midplane systems. In the first system, straps of an ion cyclotron range of frequencies antenna are configured as receiving antennas. For the second system, dedicated magnetic probes incorporated into the outer...

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Bibliographic Details
Published in:Review of scientific instruments 2018-10, Vol.89 (10), p.10I102-10I102
Main Authors: Thome, K. E., Pace, D. C., Pinsker, R. I., Meneghini, O., del Castillo, C. A., Zhu, Y.
Format: Article
Language:English
Subjects:
Aliasing
Antennas
Cyclotron frequency
Cyclotrons
Diagnostic systems
Digitization
Emission
Fast Fourier transformations
Filtration
Ions
Magnetic probes
Plasma
Plasmas (physics)
Scientific apparatus & instruments
Straps
Tokamak devices
Variation
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Summary:The Ion Cyclotron Emission (ICE) diagnostic on the DIII-D tokamak consists of two outboard midplane systems. In the first system, straps of an ion cyclotron range of frequencies antenna are configured as receiving antennas. For the second system, dedicated magnetic probes incorporated into the outer wall of carbon tiles have recently been restored. These systems collected a large set of radio frequency measurements in the 2015–2018 experimental campaigns by digitizing signals at 200 MSamples/s for ∼5 s per discharge. Each shot typically yields 32 GB of data; techniques for successful handling and analysis of this challengingly large dataset are discussed. The raw voltage fluctuations (
ISSN:0034-6748
1089-7623
DOI:10.1063/1.5035561