STATUS OF THE NEVADA SHOCKER AT THE UNIVERISTY OF NEVADA LAS VEGAS

摘要

The Nevada Shocker is a 540 kV, 7Ω, 50 ns pulsed power device based on Marx Bank and Blumlein technologies. The Marx bank is composed of nine 60 kV capacitors charged in series with a Gamma High Voltage source connected by means of Ross relays in an air environment. A trigatron switch energized with an isolated mini capacitor bank is used to erect the Marx Bank. The trigatron switch and erecting electrodes are contained in a gas manifold pressurized to 20 ±1 psi with dry air. The energy is released sequentially through an inductor and a water filled charging transmission line to the Blumlein immersed in deionized water. The Blumlein shapes and compresses the energy into a 50 ns pulse upon discharge. A self-breaking water switch initiates the release of energy in the Blumlein. The energy flows through a water filled discharging transmission line to the diode end of the Nevada Shocker. The current diode end of the Blumlein supports vacuum pressures as low as 6.5 × 10{sup}(-6) Torr. The chamber is pumped with the aid of a roughing pump and a cryogenic vacuum pump. The vacuum section of the Nevada Shocker is currently being rebuilt to incorporate mechanical and thermal loading capabilities with sensors located at the experiment. A number of diagnostic developments are currently underway to support flashover studies on plastics. Resistive probe and differential B-dot diagnostics with the aid of a 6 GHz 20 GS/s TDS 6604 real time scope will be documented demonstrating the capability of the machine.