Experimental study the electric characteristics of the deionized water and its mixture with ethylene glycol in tens microsecond regime and its application

摘要

As it is known that the breakdown electric characteristics of deionized water in the pulsed forming line (PFL) depends on the charging time of voltage. In the constructing of the high-current repetitively pulsed accelerator, the PFL usually is charged by the capacitors through the pulse transformer, in order to realize the repetition operation, the semiconductor switches such as thyristors generally be used in the primary circuit of the pulse transformer, the charging time of voltage is prolonged to tens of microsecond because of the application of thyristors, if the deionized water is used as the medium of PFL, how about the breakdown characteristic of deionized water in the PFL in the region of tens microsecond? How about the breakdown characteristic of deionized water under the repetitive operation? A testing device has been set up to investigate the electric characteristics in tens of microsecond regime, the experimental results shown that the time dependent relation of the breakdown electric of the deionized water is weakened, the exponential relation with the effective time of the charging time of voltage is near to −1/6. A high-current repetitively pulsed accelerator is built using the deionized water filled PFL and the semiconductor switches, the experimental results shown that the electric characteristic of deionized water does not to be deteriorated obviously under the 20Hz repetitive operation. The conclusions can be made that the deionized water and its mixture with the ethylene glycol is suitable to construct the compact repetitive high-current accelerator controlled by the semiconductors.