Various RF methods for non-scaling FFAGs

岡本 宏巳*; 金田 健一*; 杉本 寛*; Ruggiero, A.*; Sessler, A. M.*; 百合 庸介

no journal, , 

We study three different rf schemes in NS-FFAGs: (1) Harmonic jumping, (2) Harmonic jumping with frequency modulation and (3) Fixed frequency with phase control. We also use a circuit model of an rf cavity to study the effect of rapid variation of cavity drive frequency as well as cavity resonant frequency. It is shown that if the drive frequency is changed, according to the schemes above, the cavity must have a rather low Q (of the order of 50). On the other hand, if the cavity resonant frequency can be altered, in concert with the drive frequency change, then the cavity can be made with an arbitrarily high Q. In the third poster we describe the hardware necessary to construct an rf cavities having a low Q. In the fourth poster we describe the hardware necessary to construct an rf cavities having a high Q.