Ceramic packaged multi-gap gas switch for fast linear transformer driver
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摘要:
为了提高多间隙气体开关壳体的寿命、绝缘可靠性和装配的一致性，基于堆栈式多间隙气体开关开展了陶瓷封装多间隙气体开关工艺及击穿特性的研究。对比分析了不同封接工艺对陶瓷金属界面场分布的影响，优选了合理的封接结构。研制了用于FLTD的陶瓷封装多间隙气体开关并对其自击穿特性和触发特性开展了测试，结果表明：开关充干燥空气气压0.3 MPa、耐压±100 kV、峰值电流约30 kA条件下，5 000次放电的触发平均时延36.4 ns，抖动2.8 ns。该结果展示了陶瓷封装气体开关在产品化和免维护方面的优势，在FLTD模块中具有广阔应用前景。
Abstract:To improve the housing lifetime, insulation reliability and assembly consistency, the process and breakdown characteristics of a ceramic packaged multi-gap gas switch used for fast linear transformer driver (FLTD) were studied based on the multi-gap gas switch with stackable insulators and electrodes. The effects of different sealing processes on the electric field distribution of the interface between ceramic and metal were compared and analyzed, then the reasonable sealing structure was optimized. A ceramic packaged multi-gap gas switch was designed and its self-breakdown and triggering characteristics were experimentally tested. The results show that when the switch operates at the charging voltage of ±100 kV, the gas pressure of about 0.3 MPa and the peak current of 30 kA, the average delay time of 5 000 shots is 36.4 ns and the jitter is 2.8 ns. The ceramic package gas switch has the advantages on productization and maintenance-free, and will have broad application prospects in FLTD module.
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Key words:
- multi-gap /
- gas switch /
- ceramic packaging /
- fast linear transformer driver /
- surface insulation
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图 5 沿陶瓷壳体的外表面和内表面电场分布
Figure 5. Electric field distribution along inner and outer surface
图 10 每间隔1 000炮开关连续50发的平均时延及其抖动
Figure 10. Average time delay and jitter of 50 consecutive discharges after every 1 000 discharges
表 1 开关在不同工作电压和不同工作系数下触发时延及其抖动
Table 1. Measured delay and jitter of the switch under various charging voltage and switching coefficient
charging voltage/kV delay@60%/ns jitter@60%/ns delay@70%/ns jitter@70%/ns delay@80%/ns jitter@80%/ns ±70 47.9 1.4 38.7 1.6 33.8 0.6 ±80 46.6 1.5 36.5 1.5 32.4 1.2 ±90 46.1 3.2 34.3 1.3 31.4 1.2 ±100 44.1 4.5 33.7 1.4 31.0 3.0 
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