Direct observation of the phase space footprint of a painting injection in the Rapid Cycling Synchrotron at the Japan Proton Accelerator Research Complex

Saha, P. K.   ; Shobuda, Yoshihiro   ; Hotchi, Hideaki  ; Hayashi, Naoki  ; Takayanagi, Tomohiro   ; Harada, Hiroyuki*; Irie, Yoshiro*

In order to observe the phase space footprint of a painting injection, a method has been developed by utilizing the information from the beam position monitor (BPM) in the so-called single pass mode. The observed footprint of the painting injection was found to very consistent with expectation and realistic painting injection parameters for the beam studies as well for operation with RCS were thus determined through systematic studies. The present work is a first and successful application of BPM in single pass mode with painting injection study, and is thus a new and significant advance in actual painting injection study.