A magnetic field diagnostic system has been developed that enables measuring the transient magnetic field diffusing through conductors with wall thickness on the order of the skin depth. Typical commercial magnetic field probes are limited in their ability such that they are only able to measure in a single direction at a time, and they may require multiple measurements in different...
Two-dimensional as well as 3-D electromagnetic calculations of transient magnetic field diffusion are compared to experimental results providing unique insight into the impact of pertinent parameters on the diffusion process. For simulation, the finite element method (FEM) is employed while a pulsed high magnetic field testbed operating at a peak current of 40 kA is utilized to generate...
In order to study the nitrogen-oxygen reaction caused by intense pulse arc, in this paper, the average temperature and the radius of arc channel are calculated by the method of subsection exponential fitting in Elenbaas-Heller arc model, which is related to the arc current. The calculated result shows that when the arc current exceeds 30 kA, the arc channel average temperature is saturated...
The implementation and demonstration of laser-collision induced fluorescence (LCIF) generated in atmospheric pressure helium environments is presented in this communication. As collision times are observed to be fast (~ 10 ns), ultrashort pulse laser excitation (< 100 fs) of the 2(3)S to 3(3)P (388.9 nm) is utilized to initiate the LCIF process. Both neutral induced and electron induced...
The shock waves generated by the underwater electrical wire explosion continuously attract attentions due to its more and more applications. In this paper, the generation mechanism of shock waves generated by the underwater electrical wire explosion was investigated. A microsecond time-scale pulsed current source is used to drive the electrical explosion of copper wires with a length of 5cm...
Hydrophobicity is the key factor for silicone rubbers to fabricate insulators under polluted and wet conditions. The influence of contamination on the hydrophobic properties of plasma-treated silicone rubbers (SR) was investigated in this paper. The hydrophobicity properties of silicone rubber were determined by the static contact angles between the droplet of distilled water and the...
