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TY - CONF AU - Ohnishi, J. AU - Goto, A. AU - Kase, M. AU - Kotaka, Y. ED - Chrin, Jan ED - Schaa, Volker RW TI - Study on Energy Upgrade and Beam Transmission Efficiencies for RIKEN K-70 AVF Cyclotron J2 - Proc. of Cyclotrons2016, Zurich, Switzerland, September 11-16, 2016 C1 - Zurich, Switzerland T2 - International Conference on Cyclotrons and Their Applications T3 - 21 LA - english AB - The RIKEN K-70 AVF cyclotron has been operated since 1989 and is used as a stand-alone machine and an injector to the RI-beam factory (RIBF). It is operated only in the RF harmonics (H) equal to 2 presently, and the maximum beam energies are restricted to be within 14 MeV for protons and 12.5 MeV/u for M/Q = 2 ions. In order to meet the usersÂ’ requests of beam energy upgrade, the beam simulation studies on the H=1 operation were made, and the central region was modified; these results were already reported in this conference of 2010. In this paper, we will analyze the difference in the transmission efficiency between the beam simulation and measured data in the H=2 operation after the modification of the central region. Moreover, we will also mention the result on the acceleration test of protons at higher energies in the H=1 operation. PB - JACoW CP - Geneva, Switzerland SP - 332 EP - 335 KW - acceleration KW - proton KW - cyclotron KW - operation KW - ion DA - 2017/01 PY - 2017 SN - 978-3-95450-167-0 DO - 10.18429/JACoW-Cyclotrons2016-THP13 UR - http://jacow.org/cyclotrons2016/papers/thp13.pdf ER -