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Design and optimization of a 2 MeV X-band side-coupled accelerating structure

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Abstract

Purpose

As the development of smaller accelerators technique, an X-band bi-period side-coupled accelerating structure has been designed for medical use.

Methods

The structure’s working frequency is 9.3 GHz. \(\pi /2\) mode is chosen for the structure’s stability. There are 11 accelerating cells and 10 coupling cells, the first 5 of the accelerating cells work as non-light velocity part (\(\beta \) of the electron from 0.17 to 0.94), while the other 6 work as light velocity part. After CST simulation, the coupling constant between accelerating cells and coupling cells is 5%, and efficient shunt impedance is 142 \(M\Omega /m\). To feed power into the structure, a coupler is designed in the middle of the structure and the coupling coefficient is 1.4.

Results

After optimization, the particle’s capture efficiency is more than 30%, the particle energy is 2 MeV and the peak current is 60 mA, with the magnetron’s input power being 0.32 MW.

Conclusion

X-band side-coupled accelerator efficiency is high and is a more optimized design. This design is very meaningful for the development of smaller accelerators technique.

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Author information

Authors and Affiliations

  1. Laboratory of Particle Acceleration Physics & Technology, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, China

    Yuan Hao-Wei, Hou Mi & Gao Bin

  2. University of Chinese Academy of Science, Beijing, 100049, China

    Yuan Hao-Wei & Gao Bin

Authors
  1. Yuan Hao-Wei
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  2. Hou Mi
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  3. Gao Bin
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Corresponding author

Correspondence to Yuan Hao-Wei.

Additional information

Supported by National Natural Science Foundation of China (11275222).

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Hao-Wei, Y., Mi, H. & Bin, G. Design and optimization of a 2 MeV X-band side-coupled accelerating structure. Radiat Detect Technol Methods 1, 10 (2017). https://doi.org/10.1007/s41605-017-0010-6

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  • DOI: https://doi.org/10.1007/s41605-017-0010-6

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