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TY - CONF AU - Tamura, J. AU - Ao, H. AU - Futatsukawa, K. AU - Maruta, T. AU - Miura, A. AU - Miyao, T. AU - Morishita, T. AU - Nemoto, Y. AU - Okabe, K. AU - Yoshimoto, M. ED - Schaa, Volker RW ED - Arduini, Gianluigi ED - Pranke, Juliana ED - Seidel, Mike ED - Lindroos, Mats TI - Detection of H⁰ Particles in MEBT2 Chicane of J-PARC Linac J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017 C1 - Copenhagen, Denmark T2 - International Particle Accelerator Conference T3 - 8 LA - english AB - In the Japan Proton Accelerator Research Complex (J-PARC), H⁰ particles generated by collisions of accelerated H⁻ beams with residual gases are considered as one of the key factors of the residual radiation in the high energy accelerating section of the linac. To diagnose the H⁰ particles, the new beam line for analyzing H⁰ and H⁻ particles was installed in the second medium energy beam transport (MEBT2), which is the matching section from the separated-type drift tube linac (SDTL) to the annular-ring coupled structure linac (ACS). The analysis line consists of four dipole magnets for giving the H⁻ beam chicane orbit, and a wire scanner monitor (WSM) for measuring the horizontal shift of the H⁻ beam. To detect the H⁰ particles, a carbon plate is installed to the WSM. In the beam commissioning, we detected the signals of H⁰ particles penetrating the plate and observed the transition of the signal with various vacuum condition in the SDTL section. PB - JACoW CP - Geneva, Switzerland SP - 2308 EP - 2310 KW - vacuum KW - linac KW - ion KW - diagnostics KW - detector DA - 2017/05 PY - 2017 SN - 978-3-95450-182-3 DO - 10.18429/JACoW-IPAC2017-TUPVA096 UR - http://jacow.org/ipac2017/papers/tupva096.pdf ER -