Design of a new type of variable-frequency radio-frequency quadrupole linac with a folded-coaxial resonator

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作者
Kamigaito, Osamu [1 ]
Goto, Akira [1 ]
Miyazawa, Yoshitoshi [1 ]
Chiba, Toshiya [1 ]
Hemmi, Masatake [1 ]
Kase, Masayuki [1 ]
Yano, Yasushige [1 ]
机构
[1] Inst of Physical and Chemical, Research (RIKEN), Saitama, Japan
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Acceleration - Electric impedance - Ions - Resonators - Tubes (components);
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摘要
A new type of variable-frequency radio-frequency quadrupole (RFQ) linac that will be constructed as a new injector for the RIKEN heavy-ion linac (RILAC) is proposed. It is designed to accelerate ions with mass-to-charge ratios of 7 to 28 at up to 450 keV per charge by varying its operational frequency from 17 to 35 MHz. The resonator has a folded-coaxial structure, and the resonant frequency is changed by a movable shorting plate. As a result of a low-power test on a half-scale model, the required rf power is found to be 6 kW at 17 MHz, and it increases to 34 kW at 35 MHz in cw operation.
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