Cross-sectional view of the flux-coil-generated FRC device and diagnostic layout.
(a) Optical layout of the interferometer system on FCG-FRC (layout not scaled). (b) Block diagram of the interferometer electronics including 40 MHz local oscillator (LO), bias tees (BT) with , band-pass filters (BPF), low-pass filters (LPF), attenuator (Attn), amplifiers (Amp), splitter (Spl), and quadrature phase detectors (QPD).
Time sequences of (a) flux-coil and flux-limiter currents. (b) Axial magnetic fields at , 11.7, 27.8, and 29.5 cm. (c) Excluded-flux radius and field-null radius. (d) Line-integrated densities at and 20 cm. (e) Line-averaged densities of FRC plasma.
(a) Radial profile of axial magnetic field on FCG-FRC at with a fitted-line and (b) comparison of densities from the interferometry (chord 1) and inferred from the magnetic measurement.
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