A Preliminary study of the vibration wire monitor for beam halo diagnostic in J-PARC L3BT

Okabe, Kota  ; Yoshimoto, Masahiro  ; Yamamoto, Kazami   ; Kinsho, Michikazu  

In the J-PARC 3-GeV Rapid Cycle Synchrotron (RCS), transverse beam halo diagnostic is required to increase the output beam power. In order to provide 1 MW high power output beam for routine user program in RCS, it is required to improve the quality of the high intensity beam. The key issue to evaluate the high intensity beam quality is the suppression of the transverse beam halo. In generally, the beam halo quantity is less than 10 of the beam core. Therefore beam profile monitors for halo measurements are required very wide dynamic range, high sensitivity and resolution, and noise rejection techniques of instruments and methods. In order to determine more detail of halo formation, Vibration Wire Monitor (VWM) was under consideration by RCS monitor group. In this poster, we focus on the relevant beam halo diagnostics by new halo monitor in J-PARC L3BT. Hardware details and beam study results for the new beam halo monitor will be appeared.