Wavelength switching and scanning of the high-gain harmonic generation free-electron laser at the Dalian Coherent Light Source
The continuous wavelength tunability of free-electron lasers (FELs) offers significant potential for research across various scientific fields. The Dalian Coherent Light Source (DCLS), when operating in the high-gain harmonic generation (HGHG) mode, has demonstrated wavelength tuning capability within the vacuum ultraviolet (VUV) range of 50–150 nm. To address diverse experimental demands, it is imperative to have the capability of fast wavelength switching and scanning. This study presents three wavelength tuning strategies experimentally implemented at DCLS, each characterized by specific tuning ranges and resolutions: (i) full-range continuous wavelength switching over 50–150 nm, typically requiring more than 2 h; (ii) wide-range coarse wavelength scanning with approximately 20% variation within several minutes; and (iii) narrow-range fine wavelength scanning with a range of about 0.44% and a scanning resolution of 0.01% in less than 1 min. Each strategy has its own advantages and limitations, and their combination significantly enhances the flexibility of wavelength manipulation at DCLS, accommodating diverse user requirements.
Authors
- Jitao Sun (ORCID: https://orcid.org/0009-0007-0980-774X)
- Ling Jiang (ORCID: https://orcid.org/0000-0002-8485-8893)
- Jiami Zhou (ORCID: https://orcid.org/0000-0002-6535-0437)
- Zhigang He
- Guorong Wu (ORCID: https://orcid.org/0000-0002-0212-183X)
- Jia‐Yue Yang (ORCID: https://orcid.org/0000-0002-3678-827X)
- Siyue Liu (ORCID: https://orcid.org/0000-0002-9530-2778)
- Jiahang Shao (ORCID: https://orcid.org/0000-0003-3256-1083)
- Xu Shi (ORCID: https://orcid.org/0000-0002-6353-5470)
- Wenrui Dong (ORCID: https://orcid.org/0000-0002-3640-1821)
- Qinming Li (ORCID: https://orcid.org/0000-0001-8420-8746)
- Xueming Yang (ORCID: https://orcid.org/0000-0001-7309-7817)
- Weiqing Zhang (ORCID: https://orcid.org/0000-0001-6518-4152)
- Chong Wang (ORCID: https://orcid.org/0000-0003-3114-7681)
- Xiaofan Wang (ORCID: https://orcid.org/0000-0002-2670-5119)
- Yong Yu (ORCID: https://orcid.org/0009-0004-3061-9207)
- Xinmeng Li (ORCID: https://orcid.org/0009-0002-5955-1950)
- Feiyang Yin
Institutions
- Dalian Institute of Chemical Physics (CN)
- Dalian University of Technology (CN)
- Primary Source (US)
- University of Chinese Academy of Sciences (CN)
- Advanced Light Source
Publication Details
- Journal
- Physical Review Accelerators and Beams
- Published
- 2025-10-09
- DOI
- https://doi.org/10.1103/2wmp-cb2b
- Primary Topic
- Particle Accelerators and Free-Electron Lasers
- Type
- article
- Field-Weighted Citation Impact
- 0.00