摘要: Low-pressure switches and magnetic switches have been tested as possible replacements for the high-pressure switches currently used on Experimental Test Accelerator (ETA) and Advanced Test Accelerator (ATA). When the low-pressure ... 展开 Low-pressure switches and magnetic switches have been tested as possible replacements for the high-pressure switches currently used on Experimental Test Accelerator (ETA) and Advanced Test Accelerator (ATA). When the low-pressure switch is used with a low-impedance transmission line, runaway electrons form a pinched-electron beam which damages the anode. We have tested the use of the low-pressure switch as the first switch in the pulsed-power chain; i.e., the switch would be used to connect a charged capacitor across the primary winding of a step-up transformer. An inductor with a saturating core is connected in series so that, initially, there is a large inductive voltage drop. As a result, there is a small voltage across the switch. By the time the inductor core saturates, the switch has developed sufficient ionization so that the switch voltage remains small, even with peak current, and an electron beam is not produced. A 15 mu F capacitor was used with charge voltages up to 50 kV. The time-to-current maximum was 5 to 8 mu s. The current terminated at about 50 mu s, and the voltage could be reapplied at about 100 mu s. (ERA citation 07:047756) 收起