Drive laser system for the DC-SRF photoinjector at Peking University

Zhi-Wen Wang; Sen-Lin Huang; Lin Lin; Gang Zhao; Sheng-Wen Quan; Ke-Xin Liu; Jia-Er Chen

doi:10.1088/1674-1137/40/1/017004

Chinese Physics C> 2016, Vol. 40> Issue(1) : 017004 DOI: 10.1088/1674-1137/40/1/017004

Drive laser system for the DC-SRF photoinjector at Peking University

1.
State Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, Peking University, Beijing 100871, China

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Abstract：
Photoinjectors are widely used for linear accelerators as electron sources to generate high-brightness electron beams. The drive laser, which determines the timing structure and quality of the electron beam, is a crucial component of a photoinjector. A new drive laser system has been designed and constructed for the upgraded 3.5-cell DC-SRF photoinjector at Peking University. The drive laser system consists of a 1064 nm laser oscillator, a four-stage amplifier, second and fourth harmonic generators, an optical system to transfer the UV pulses to the photocathode, and a synchronization system. The drive laser system has been successfully applied during stable operation of the DC-SRF photoinjector and its performance meets requirements. A 266 nm laser with an average power close to 1 W can be delivered to illuminate the Cs₂Te photocathode and the instability is less than 5% for long time operation. The design considerations for improving the UV laser quality, a detailed description of the laser system, and its performance are presented in this paper.
- drive laser ,
- amplifier ,
- harmonic generation ,
- photoinjector

References

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Zhi-Wen Wang, Sen-Lin Huang, Lin Lin, Gang Zhao, Sheng-Wen Quan, Ke-Xin Liu and Jia-Er Chen. Drive laser system for the DC-SRF photoinjector at Peking University[J]. Chinese Physics C, 2016, 40(1): 017004. doi: 10.1088/1674-1137/40/1/017004

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Received: 2015-03-02
Revised: 2015-08-06

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Supported by National Basic Research Project (973) (2011CB808302, 2011CB808304)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Drive laser system for the DC-SRF photoinjector at Peking University

Corresponding author: Sen-Lin Huang,

1. State Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, Peking University, Beijing 100871, China

Received Date: 2015-03-02

Accepted Date: 2015-08-06

Available Online: 2016-01-20

Fund Project: Supported by National Basic Research Project (973) (2011CB808302, 2011CB808304)

Abstract: Photoinjectors are widely used for linear accelerators as electron sources to generate high-brightness electron beams. The drive laser, which determines the timing structure and quality of the electron beam, is a crucial component of a photoinjector. A new drive laser system has been designed and constructed for the upgraded 3.5-cell DC-SRF photoinjector at Peking University. The drive laser system consists of a 1064 nm laser oscillator, a four-stage amplifier, second and fourth harmonic generators, an optical system to transfer the UV pulses to the photocathode, and a synchronization system. The drive laser system has been successfully applied during stable operation of the DC-SRF photoinjector and its performance meets requirements. A 266 nm laser with an average power close to 1 W can be delivered to illuminate the Cs₂Te photocathode and the instability is less than 5% for long time operation. The design considerations for improving the UV laser quality, a detailed description of the laser system, and its performance are presented in this paper.

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Drive laser system for the DC-SRF photoinjector at Peking University

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通讯作者: 陈斌, bchen63@163.com

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