Generation of sub-mm focal spot for intense-current accelerator utilizing spatial collimating restriction

Wang Yi; Li Jin; Li Qin; Dai Zhiyong

doi:10.11884/HPLPB202032.190166

Volume 32 Issue 5

Feb. 2020

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Wang Yi, Li Jin, Li Qin, et al. Generation of sub-mm focal spot for intense-current accelerator utilizing spatial collimating restriction[J]. High Power Laser and Particle Beams, 2020, 32: 054002. doi: 10.11884/HPLPB202032.190166

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Wang Yi, Li Jin, Li Qin, et al. Generation of sub-mm focal spot for intense-current accelerator utilizing spatial collimating restriction[J]. High Power Laser and Particle Beams, 2020, 32: 054002. doi: 10.11884/HPLPB202032.190166

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Generation of sub-mm focal spot for intense-current accelerator utilizing spatial collimating restriction

doi: 10.11884/HPLPB202032.190166

Key Laboratory of Pulsed Power, Institute of Fluid Physics, CAEP, Mianyang 621900, China

Received Date: 2019-05-15
Rev Recd Date: 2020-02-01
Publish Date: 2020-02-10

Abstract

Abstract

Focal spot size is a key parameter for evaluating the resolving power of the accelerator. A reduction in the focal spot size can effectively improve the spatial resolution of the object. This work studies and designs collimator structures for spatial restriction, which help to reduce the geometry blur of imaging and thus obtain a smaller effective spot-size. The Monte Carlo method is applied to simulate the generation of the light source and the imaging process of the spatial restriction structures. The parameters of the light source with different collimator structures are analyzed, including the distribution and size of the effective focal spot, the angular distribution and the spectrum of the photons. Theoretical calculations show that an effective focal spot size with a sub-mm scale can be obtained by means of spatial restriction at the expense of a partial loss of the field-of-view and the exposure.
- linear induction accelerator,
- bremsstrahlung radiation,
- spatial restriction,
- Monte Carlo simulation

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References(10)

References

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