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TY - CPAPER AU - Leo, K.W. AU - Adachi, T. AU - Dixit, T.S. AU - Kawakubo, T. AU - Monma, T. AU - Takayama, K. TI - A Compact Hadron Driver for Cancer Therapies with Continuous Energy Sweep Scanning J2 - Proc. of Heavy Ion Accelerator Technology Conference (HIAT2015), Yokohama, Japan, 7-11 September 2015 AB - A design of a compact hadron driver for future cancer therapies based on the induction synchrotron concept is given. In order to realize a slow extraction technique in a fast cycling synchrotron, which allows the energy sweep beam scanning, the zero momentum-dispersion D(s) region and high flat D(s) region are necessary. The lattice has the two fold symmetry with a circumference of 52.8 m, 2 m-long dispersion-free straight section, and 3 m-long large flat dispersion straight section. Assuming a 1.5 T bending magnet, the ring can deliver heavy ions of 200 MeV/au at 20 Hz. A beam fraction is dropped from the barrier bucket at the desired timing and the increasing negative momentum deviation of this beam fraction becomes enough large for the fraction to fall in the ES septum extraction gap, which is placed at the large D(s) region. The programmed energy sweeping extraction makes spot scanning beam irradiation on a cancer area in depth possible without an energy degrader avoiding the production of secondary particles or the degradation of emittance. Details of the lattice parameters and computer simulations for slow extraction are discussed. PB - JACoW CY - Geneva, Switzerland SP - 291 EP - 293 KW - extraction KW - acceleration KW - hadron KW - induction KW - timing DA - 2016/02 PY - 2016 SN - 978-3-95450-131-1 DO - 10.18429/JACoW-HIAT2015-FRM1C03 UR - http://accelconf.web.cern.ch/AccelConf/HIAT2015/papers/frm1c03.pdf ER -