Simulation of harmonic lasing self-seeded free electron laser

Tu Lingjun; Wang Xiaofan; Zhang Weiqing

doi:10.11884/HPLPB202436.240102

Volume 36 Issue 7

May 2024

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Tu Lingjun, Wang Xiaofan, Zhang Weiqing. Simulation of harmonic lasing self-seeded free electron laser[J]. High Power Laser and Particle Beams, 2024, 36: 071004. doi: 10.11884/HPLPB202436.240102

Citation:

Tu Lingjun, Wang Xiaofan, Zhang Weiqing. Simulation of harmonic lasing self-seeded free electron laser[J]. High Power Laser and Particle Beams, 2024, 36: 071004. doi: 10.11884/HPLPB202436.240102

Tu Lingjun, Wang Xiaofan, Zhang Weiqing. Simulation of harmonic lasing self-seeded free electron laser[J]. High Power Laser and Particle Beams, 2024, 36: 071004. doi: 10.11884/HPLPB202436.240102

Citation:

Tu Lingjun, Wang Xiaofan, Zhang Weiqing. Simulation of harmonic lasing self-seeded free electron laser[J]. High Power Laser and Particle Beams, 2024, 36: 071004. doi: 10.11884/HPLPB202436.240102

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Simulation of harmonic lasing self-seeded free electron laser

doi: 10.11884/HPLPB202436.240102

Tu Lingjun^1
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Wang Xiaofan^{1
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Zhang Weiqing^{2
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1.
Institute of Advanced Science Facilities, Shenzhen 518107, China
2.
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 110623, China

Received Date: 2024-03-20
Accepted Date: 2024-05-11
Rev Recd Date: 2024-05-11

Available Online: 2024-05-29

Publish Date: 2024-05-31

Abstract

Abstract

Among free electron laser (FEL) schemes, the Harmonic Lasing Self-Seeded (HLSS) scheme can reduce the radiation bandwidth of self amplified spontaneous emission (SASE) and improve the spectral brightness of FEL in X-ray band. The principle of HLSS has been verified at FLASH, PAL, European XFEL and other laboratories. The HLSS scheme can improve the coherence of a SASE FEL without additional hardware, so it can be easily applied to domestic facilities under construction or running in SASE scheme. In this paper, the principle of the HLSS scheme to achieve narrow bandwidth is summarized, and the quantitative conditions of the undulator parameters are given. Typical parameters of Shenzhen superconducting soft X-ray free electron laser are used to simulate the HLSS scheme. Simulation results show that the bandwidth in the HLSS scheme can be reduced to about 1/2 of the bandwidth in SASE, and the spectral brightness can increase to about 2 times, when the output wavelengths are 4.5 nm and 6.75 nm.
- harmonic lasing,
- self-seeding,
- self-amplified spontaneous emission,
- narrow bandwidth,
- longitudinal coherence,
- free electron laser

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References(19)

References

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