Ultraviolet (UV) illumination can effectively shorten the statistical lag and jitter in gas breakdown processes. The spark gap discharge can produce abundant spectrum including UV waveband. In this paper, a simple but reliable spark gap operating with N 2 at atmospheric pressure is used to test optical radiation characteristics, such as spectrum intensity, rise time, fall time, and duration of optical pulse, which are adjusted by changing the circuit or configuration parameters. Three UV-illuminated switches with different UV spark gap configurations have been tested. The experimental results approve our assumption. With a uniform electric field UV spark gap, the breakdown voltage standard deviation percentage of the switch is 0.74%.Index Terms-Breakdown characteristics, jitter, optical pulse parameter, pulsed power technology, pulsed switch, ultraviolet (UV) illumination.
The novel hybrid self‐assembly of a carboxy‐ended hyperbranched polyester/copper complex on glass substrates is presented. Ordered, tree‐like self‐assemblies with sizes of about 400–900 μm and branch widths of about 1 μm are obtained, which demonstrate an intriguing crystalline and fractal structure by XRD, DSC, and SEM techniques. The fractal dimension (Df) of 1.67 suggests a perfect supramolecular structure. Factors affecting the morphology of self‐assembly, including self‐assembly time, relative humidity, and concentration of the complex, are investigated and the hybrid self‐assembly is attributed to the synergistic action of cupric ion coordination induction, micelle formation, and diffusion‐limited aggregation of micelles.
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