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Feasibility Studies of a Vibration Wire Monitor and a Halo Scraper in the J-PARC L3BT
Kota Okabe,Kazami Yamamoto,Masahiro Yoshimoto,Michikazu Kinsho 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.7
In the Japan Proton Accelerator Research Complex (J-PARC) 3-GeV rapid cycle synchrotron(RCS), transverse beam halo diagnostics and scraping are required to increase the output beampower. Wire scanners and halo scrapers were used to measure the projected beam distributions todetermine the extent of beam halo formation at the linac 3-GeV beam transport line (L3BT). Inorder to determine more details of halo formation, we installed a vibration wire monitor (VWM) inthe L3BT for the beam halo measurement. The high sensitivity of the VWM makes it a prospectivetool for investigating the beam halo and weak beam scanning. Also, we developed a new verticalscraper system with a thin carbon foil to collimate the beam halo in the L3BT. In this paper, wewill report a preliminary result for the beam-halo measurement by using a VWM and a halo scraperat the L3BT, and we will discuss the potential of the VWM for beam-halo diagnostics.