A kind of silicone rubber (SR)/carbon fiber (CF)@polydopamine (PDA) flexible composites were prepared in this work. CF was modified by oxidative self‐polymerization of dopamine (DA), and the effect of DA concentration on properties of SR/CF@PDA composites was researched. The transverse fiber bundle tests have shown that SR/CF@PDA‐1.5 has the best interfacial bonding performance. Compared with SR/CF, tensile strength and elongation at break of SR/CF@PDA‐1.5 were increased by 61.7% and 68.4%, respectively. Results indicate that the interfacial bonding of SR/CF@PDA composites was effectively improved due to the adhesion properties of PDA. Moreover, the rough surface of CF@PDA also enhanced the interface interaction through physical “interlocking.” When being compared to other surface modification process, dopamine‐modified carbon fiber is cost effective, “green” and highly efficient. SR/CF@PDA with an excellent interfacial bonding and flexibility is a kind of wrapping material for protection of special precision instruments.

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A 22-stage 4 MV laser-triggered multistage multi-channel switch (LTS) was designed according to the hypothesis that the well-proportioned electrical field distribution is helpful in reducing the jitter of delay. Field distribution in the switch section is regulated by a metal field regulation ring and several gradient rings. In order to reduce the jitter further, a SF6/N2 mixture is chosen as the switching medium. The generalized standard deviation of the self-breakdown voltage and the deviation of the average value from the prediction is less than 4.4% and 13% respectively. Linearity of the self-breakdown voltage is better than 0.95. Triggered by a laser pulse of 35 mJ/3 ns, the delay is about 26 ns at a working voltage of 85% 3% USB (Self-breakdown Voltage). Maximum deviation of delay is less than ±2.5 ns. Jitter is less than 1.5 ns. The delay and jitter decrease with the increase in the working ratio (the ratio of working voltage to USB), pressure or voltage.