Author: Satou, K.
Paper Title Page
TUPCF11 Upgrade of the Beam Position Monitoring System at the J-PARC Main Ring for High Intensity Operation 229
 
  • A. Kobayashi, H. Kuboki, K. Satou, T. Toyama
    KEK, Tokai, Ibaraki, Japan
  
  For the T2K neutrino oscillation experiment upgrade programs of J-PARC are on-going for higher beam intensity. The ultimate goal is to achieve a beam power of 1.3 MW in the main ring, a significant increase more than triple intensity compared to the presently achieved power of 470 kW. Beam loss is a cause of the limitation on the proton bunch intensity. A precise orbit correction is necessary in order to reduce the beam loss. Beam position monitor (BPM) is a vital element providing accurate measurements of the beam positions for the control of closed orbit distortion (COD). Currently an apparent dependence of COD RMS on the beam intensity is observed (about 30 μ m). In order to understand the nature of the phenomenon, investigations are being made on the BPM response and its intensity dependence as well as on the effects of wake field, beam bumps to COD and septum. Status of the studies will be discussed. Also presented are new design of BPM for improved position resolution and stability, and its expected performance.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TUPCF11  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WE3AB2
 Simulation and Progress in Ionization Profile Monitors for High Intensty Proton Beam  
 
  • K. Satou, T.M. Mitsuhashi
    KEK, Ibaraki, Japan
  
  Nondestructive beam profile monitoring is strongly requested for the proton machines, especially for the measurement of the high intensity high brightness beams. Ionization profile monitor is traditionally used for measurement of beam profile in the proton machines and proposed to measure the high intensity high brightness beams. The important issues are no uniformities of extraction field, velocity distribution of e- from ionization process, the strong beam field and detection system, etc. In this talk, we will review recent developments on these issues from theoretical and experimental approach.  
slides icon Slides WE3AB2 [3.546 MB]  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)