Negative-Polarity Rod-Pinch Diode Experiment at 5 MV on RITS-3

Design, Simulation, and Fault Analysis of a 6.5-MV LTD for Flash X-Ray Radiography

“…For a forwardgoing voltage of 7 MV, which is the voltage predicted by the circuit simulations, the above calculations predict a diode voltage of 6.47 MV for a bound-current diode impedance of 50 Ω. We also note that the diode impedances between 40 and 60 Ω have been reported in the recent negative-polarity rod-pinch diode experiments at voltages between 4 and 6 MV on RITS-3 [25].…”

“…This represents the usable current, i.e., the current that can be readily coupled to the typical radiographic diodes such as the negative-polarity rod-pinch [25] and self-magnetic pinch diodes [26]- [28]. The individual points in Fig.…”

“…4] for a reflected wave with an impedance or ∆V /∆I of −Z v (the dashed lines are the constant impedance loading lines for a diode impedance of 38, 31.2, and 24.1 Ω, respectively). Once the voltage and the current behind the retrapping wave are known, then Creedon's theory [25] can be used to obtain the cathode current. Thus, the expression for the diode voltage is simply…”

Negative-polarity Rod-pinch diode experiments on RITS-6

“…The Rod-pinch diode has been studied on several pulsed power drivers at voltages ranging from about 1 MV to 6 MV [3]- [7]. Below about 4 MV, x-ray production is * Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.…”