(a) Photograph of the pulsed power system, (b) the split coil is incorporated in a stainless steel flange and remains at air, which gives advantage to high-voltage insulation, cooling, and simplifies the construction of current feedthroughs. The transmission line that is connected to the pulsed power unit is seen to exit the re-entrant assembly.
(a) Sketch of the split coil contained in the re-entrant tubing and contained in the laser experimental target chamber, (b) sketch of the implantation of the coil in the ELFIE laser target chamber.
Global electrical scheme of the pulser and the coil system, including the Rogowski probe.
Typical discharge in the coil for 6 kV, 5 kV, and 3 kV applied voltages.
(a) B(T) vs radius and (b) B(T) in the longitudinal direction for a 12 kV applied voltage.
Evolution of the split coil temperature.
Overall structure of the ELFIE laser facility at Ecole Polytechnique.
Transverse probing (raw interferometric data) obtained following the irradiation of a Cu 250 μm thick foil by a 500 ps duration laser focused using a RPP focal spot (diameter of ∼750 μm FWHM) and at an intensity of ∼1 × 1012 W cm−2. The images are taken 5 ns after the beginning of the interaction (a) without external magnetic field and (b) with a 20 T magnetic field added parallel to the plasma expansion axis. Plasma density computed using Abel inversion 19 (c) for the image shown in of (a) and (d) for the image shown in (b).
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