Pressure Fed Into The Induction Accelerating Cavity Performance

There are two choices to feed power pulse into the induction accelerating cavity , one is feed-in by axial method ,the other is feed-in by radial method. This paper study the changes of the induction accelerating cavity parameters by vary power pulse feed-in methods.There are some parameters to describe the accelerating cavity's performance: the amplitude of flat-roofed pulse voltage fluctuate , transverse impedance and the performance of high voltage standoff. Before the design of induction accelerating cavity , we must calculate if the electric beams could be accelerated, transmitted and focalized efficiently or not. So , the amplitude of flat-roofed pulse voltage fluctuate should be low enough to reduce energy sweep and transverse beam motion ,we must have an accelerating cavity with low transverse impedance to prevent beam break-up , and the accelerating cavity should have the ability of high voltage standoff.In this paper, the difference between power pulse feed-in by axial method and by radial method is analyzed with transformer model and transmission line model . Presents experimental results, which prove that it is almost the same that the influence to the amplitude of flat-roofed pulse voltage fluctuate by these two methods .The experimental result is accord with theory analyse.Presents some results of numerical simulation of cavity 3D models' transverse impedance to compare the difference between these two power pulse feed-in models cavities. Got a conclusion that feed-in by axial method will reduce the transverse impedance more than that feed-in by radial method...