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Reproducibility of Microsecond Self-Breakdown Water Switch With Negative Field Enhancement

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7 Author(s)
Peitian Cong ; State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China ; Guowei Zhang ; Liang Sheng ; Tieping Sun
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Based on the “QiangGuang-I” facility, three negatively enhanced microsecond water switches are experimentally studied, and their self-breakdown reproducibilities are particularly investigated and compared. Experimental results show that the annular-cathode-plate switch has a lower jitter (about 110 ns) and its lifespan can be up to 100 shots. Moreover, it is found that the close jitter decreases with the increase of negative field-enhancement factor f (the ratio of the maximum electric-field strength to the mean one of the anode-cathode gap). Finally, the experimental phenomena mentioned previously are particularly discussed according to the results of optical (3-5 ns gated charge-coupled device) and electrical diagnostics.

Published in:

IEEE Transactions on Plasma Science  (Volume:41 ,  Issue: 2 )