Dual bunching form and performance of Underwater Plasma Sound Source

Underwater Plasma Sound Source (UPSS) has many advantages and is applied more and more widely, so how to get a bigger bunching wave peak pressure is the focus of current research. In this paper, the principle of directional bunching and dual superposition of UPSS was analyzed, the corresponding experimental system was established based on the self-designed parabolic spherical reflector; 5 kinds of dual bunching superposition forms (Fig.4) were proposed, and the performance of dual bunching superposition was researched. The experiment indicates that form I, III and V could realize the dual bunching; form II and IV only one channel discharges. Compared the dual bunching parameters of the forms which can realize the dual bunching, such as the mean and variance of the peak pressure and the pulse-width at half maximum (PWHM), bunching gain and other parameters (TABLE 1), it is shown that the form of double storage double trigger has the best performance, whose gain of dual bunching is more than 4 dB. This research provides a basis for the design and implementation of multiple arrays bunching for UPSS system.