Plasma jets generated from conical-wire arrays driven by a 1-kJ pulsed-power system
Abstract
Plasma jets were generated by using conical-wire arrays driven by a pulsed-power system. The pulsed-power system was built for studying space sciences, particularly in simulating solar winds. The pulsed-power system consisted of twenty 1- μF capacitors, two rail-gap switches, two parallel plate transmission lines, and a cylindrical vacuum chamber orientated vertically. Two capacitors were first connected in series forming a brick. Five bricks were connected in parallel forming a wing. Finally, two wings were connected in parallel forming the whole capacitor bank, i.e., 5 μF in total. The system was charged to 20 kV storing total energy of 1 kJ . When it was discharged, a peak current of 110 +/- 20 kA with a rise time of 1 . 4 +/- 0 . 2 μs , i.e., a peak power of ∼ 700 MW , was provided. The conical-wire array was formed by four tungsten wires with a diameter of 20 μm . The opening angle and the smaller radius of the conical-wire arrays were 30o and 5 mm , respectively. Images of the implosions were taken by an x-ray pinhole camera with an exposure time of 1 μs , i.e., temporal-integrated images of the implosions. Images of the implosion will be shown.
This work was supported by MOST, Taiwan, under Award Number 105-2112-M-006-014-MY3 and 109-2112-M-006-011.- Publication:
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APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- 2020
- Bibcode:
- 2020APS..DPPV06014C