The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF AU - Kobayashi, A. AU - Kuboki, H. AU - Satou, K. AU - Toyama, T. ED - Liu, Zhengzheng ED - Lidia, Steven ED - McCausey, Amy ED - Schaa, Volker RW TI - Upgrade of the Beam Position Monitoring System at the J-PARC Main Ring for High Intensity Operation J2 - Proc. of IBIC2017, Grand Rapids, MI, USA, 20-24 August 2017 C1 - Grand Rapids, MI, USA T2 - International Beam Instrumentation Conference T3 - 6 LA - english AB - 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. PB - JACoW CP - Geneva, Switzerland SP - 229 EP - 232 KW - ion KW - kicker KW - impedance KW - wakefield KW - septum DA - 2018/03 PY - 2018 SN - 978-3-95450-192-2 DO - 10.18429/JACoW-IBIC2017-TUPCF11 UR - http://jacow.org/ibic2017/papers/tupcf11.pdf ER -