Box-type resonant cavity
A resonant cavity and box-type technology, applied in the field of resonant cavity, can solve the problems of difficult spatial mechanical layout, difficult realization, and increased difficulty in debugging the beam optical path.
Active Publication Date: 2019-04-12
CHINA INSTITUTE OF ATOMIC ENERGY
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Therefore, it is more difficult in the spatial mechanical layout, and it is even difficult to complete, because in engineering, the turning of the pipeline requires a certain turning radius and mechanical space.
[0004] Theoretically, if the trajectory of particles outside the cavity is a semi-circular arc, the length of the path must be smaller than the wavelength of the resonance frequency of the cavity, but this is difficult to achieve in engineering, because the energy of the particles increases with the helical motion. It is possible to make a large magnet to achieve the spiral motion of particles with equal radius, but using discrete magnets, the number of magnets is too many, the design of the beam optical path and the debugging of the beam are very difficult, even if the spiral motion of the pentagon is used
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[0019] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0020] In order to solve the above-mentioned problem that the length of the electron movement path is small relative to the diameter of the cavity, it is necessary to reduce the diameter of the cavity. However, if the diameter is reduced, the resonant frequency of the cavity will increase, and the wavelength of the radio frequency will be shortened. The overall effect is that the length of the two adjacent accelerated electron motion paths after shortening the cavity diameter is still three times that of the cavity. The length of the diameter is equivalent, so the above-mentioned problem cannot be solved by directly reducing the diameter of the cavity.
[0021] In the case of keeping the resonant frequency of the cavity unchanged, in order to reduce the cavity space surrounded by the electron helical motion, it can be considered to move a part of the vol...
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The invention relates to a box-type resonant cavity, which can be used for an accelerator such as a spiral accelerator or a serpentine multi-cavity electron accelerator. A cavity dividing part of theresonant cavity divides a vacuum cavity into a box cover and a box body, the box cover is small in volume and the box body is large in volume, and the purpose of the cavity dividing part is to reducethe volume of the vacuum cavity surrounded by the spiral motion, so that the particle transmission path of the adjacent two accelerations is less than or equal to the wavelength of the resonant frequency of the cavity.
Description
technical field [0001] The present invention relates to a charged particle accelerator, more particularly to a resonant cavity in the accelerator. Background technique [0002] Accelerator is a complex high-tech device, which is widely used in scientific research, industrial and agricultural production, medical and health, national defense and military, environmental protection, public safety and other fields. There are many types of electron accelerators, including electrostatic high-voltage accelerators, electron linear accelerators, and electron induction accelerators. [0003] The resonant cavity in the prior art uses a cylindrical cavity to insert two electrode plates to form a H in the cavity. 110 pattern of electromagnetic fields. The electromagnetic field of this mode forms a resonant electric field in the gap between the two electrode plates, which is used to accelerate electrons, and the trajectory of the electrons passes through the centerline cylinder axis of t...
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IPC IPC(8): H05H7/18H05H13/00
CPCH05H7/18H05H13/005
Inventor 李金海杨京鹤刘保杰向益淮
Owner CHINA INSTITUTE OF ATOMIC ENERGY