Laser stripping experiment of 400 MeV H beam in J-PARC

Harada, Hiroyuki  ; Saha, P. K.   ; Yoneda, Hitoki*; Michine, Yurina*; Onoda, Genki*; Yamada, Ippei ; Shibata, Takanori*; Sato, Atsushi*; Kinsho, Michikazu  

In high-intensity proton accelerators, negative hydrogen ions are charge-exchanged to protons by a carbon foil installed at the injection point of a ring accelerator. While this injection method can produce a high-intensity proton beam, it is a destructive method in which beams are passed through the foil, which leads to a short lifetime of the foil itself and to high radiation of the injection devices. Therefore, we proposed a non-destructive laser stripping injection scheme and develop for laser stripping experiment. In this study, a long-distance laser optical path of 70 m was newly constructed for the experiment. In this presentation, an overview of the laser stripping injection will be presented and the construction of the optical path, which is important for the execution of this experiment, will be reported. In addition, future experimental plans and prospects will be discussed.