Separatrix radius measurement of field-reversed configuration plasma in FRX-L

Magnetic pickup coils and single turn flux loops are installed on the FRX-L device. The combination of the two measurements provides the excluded flux radius that approximates the separatrix radius of the field-reversed configuration (FRC) plasma. Arrays of similar probes are used to map out local m...

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Bibliographic Details
Published in:Review of Scientific Instruments 2004-10, Vol.75 (10), p.4289-4292
Main Authors: Zhang, S. Y., Tejero, E. M., Taccetti, J. M., Wurden, G. A., Intrator, T. P., Waganaar, W. J., Perkins, R.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALUMINIUM
CALIBRATION
CUSPED GEOMETRIES
FIELD-REVERSED THETA PINCH DEVICES
MAGNETIC FIELDS
MAGNETIC FLUX
PLASMA
PLASMA CONFINEMENT
PLASMA DIAMAGNETISM
REVERSE-FIELD PINCH
REVERSED-FIELD PINCH DEVICES
TRAPS
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Summary:Magnetic pickup coils and single turn flux loops are installed on the FRX-L device. The combination of the two measurements provides the excluded flux radius that approximates the separatrix radius of the field-reversed configuration (FRC) plasma. Arrays of similar probes are used to map out local magnetic field dynamics beyond both ends of the theta-coil confinement region to help understand the effects of cusp locations on flux trapping during the FRC formation process. Details on the probe design and system calibrations are presented. The overall system calibration of excluded flux radius measurement is examined by replacing FRC plasma with a known radius aluminum conductor cylinder.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1789618