| 摘要 |
PROBLEM TO BE SOLVED: To provide a high frequency acceleration cavity apparatus and its operating method capable of suppressing vacuum leak from a high frequency acceleration cavity. SOLUTION: The high frequency acceleration cavity apparatus is provided with an input coupler 4, and a vertical magnetic field generating coil 11. The input coupler 4 is provided with a main body 1 having a vacuum-maintained cavity formed therein, an inner conductor 6 extending from the cavity toward the outside of the main body 1, and an outer conductor 5 extending so as to surround the inner conductor 6 coaxially with the inner conductor 6 and having a ceramic window 7 surrounding a part of the inner conductor 6 with respect to the axial direction. The vertical magnetic field generating coil 11 generates a magnetic field in an axial direction of an inner conductor 6 of the inner conductor 6. The high frequency acceleration cavity apparatus may be provided with a horizontal magnetic field generating coil 10 for generating a magnetic field perpendicular to the axial direction of the inner conductor 6. Rod antennas 23 of high order mode attenuators 3 and noses 2 formed around circle holes 21 of the main body 1 through which charged particles pass are arranged so as not to directly view the ceramic window 7. The ceramic window 7 may be subjected to coating at both ends thereof. COPYRIGHT: (C)2008,JPO&INPIT
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