Speaker
Description
To stabilize the ion trap and improve efficiency of SCRIT (Self-Confining RI Ion Target) experiment, it is essential to eliminate beam instability in the electron storage ring, SR2 (SCRIT-equipped Riken Storage Ring). The main cause of the beam instability is the Higher Order Modes (HOM) of the acceleration cavity induced by the wake field of the beam, which requires improvement of the acceleration cavity. In order to suppress the beam instability, we are introducing Landau cavities as harmonic cavities and developing a new acceleration cavity using TM020 mode and slot-type HOM damping mechanism. It is expected that the growth of instability will be suppressed by adding third-order harmonic voltage by Landau cavities. In addition, by installing a slot-type HOM damping mechanism at the nodal position of the TM020 mode, only the HOM causing the instability can be damped. The present status of these cavity developments is reported in this study.
