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Description
Intraoperative radiotherapy(IORT) is one of the important
treatment modalities for cancer. To advance the development
of X-ray IORT equipment technology, this paper presents
a design study of a dedicated electron linear accelerating
tube for X-ray IORT equipment. The accelerator adopts an
X-band standing-wave accelerating structure with an oper
ating frequency of 9.3 GHz, and consists of two cavities.
There is no direct coupling between the two cavities. The
RF power for each cavity is fed separately through a power
divider and two input couplers. The total RF power required
by the two cavities is within 20 kW, and the operating voltage
is within 10 kV, which increases the safety and stability of
the equipment. The electromagnetic simulation software
CSTwas used for modeling, and the RF_Track software was
employed for beam dynamics simulation. The final results
show that the most probable energy of the electron beam
at the accelerating tube exit is 50 keV, and the electron cap
ture efficiency is 39.19%. This design achieves electron
beam parameters that meet the requirements of X-ray IORT
equipment under low-power and low-voltage conditions, ver
ifying the feasibility of a compact X-band standing-wave
accelerating tube scheme.
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