Recent Progress of the Beijing FEL-Realizing Saturated Oscillation

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Xie Jialin, Zhuang Jiejia, Huang Yongzhang, Zhang Lingyi, Lin Shaobo, Zhao Changnong, Li Lihua, Wu Gang, Wang Gang, Li Chengze, Su Jing, Zhong Yuanyuan, Wang Yanshan, Li Yonggui, Ying Runjie, Yang Xueping, Li Youmeng, Han Bin, Wu Qingwu, Zhang Yuzhen, Pan Weimin, Wang Jianwei, Zhang Liwen, Guo Kangzhu, Chang Xiangyun, Li Yanan, Dai Lisheng, Xu Jingqiang, Lu Huihua, Wang Bozhi, Reng Liangzhong, Tian Ruisheng and Fu Ensheng. Recent Progress of the Beijing FEL-Realizing Saturated Oscillation[J]. Chinese Physics C, 1994, 18(S3): 307-314.
Xie Jialin, Zhuang Jiejia, Huang Yongzhang, Zhang Lingyi, Lin Shaobo, Zhao Changnong, Li Lihua, Wu Gang, Wang Gang, Li Chengze, Su Jing, Zhong Yuanyuan, Wang Yanshan, Li Yonggui, Ying Runjie, Yang Xueping, Li Youmeng, Han Bin, Wu Qingwu, Zhang Yuzhen, Pan Weimin, Wang Jianwei, Zhang Liwen, Guo Kangzhu, Chang Xiangyun, Li Yanan, Dai Lisheng, Xu Jingqiang, Lu Huihua, Wang Bozhi, Reng Liangzhong, Tian Ruisheng and Fu Ensheng. Recent Progress of the Beijing FEL-Realizing Saturated Oscillation[J]. Chinese Physics C, 1994, 18(S3): 307-314. shu
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Received: 1993-03-21
Fund

    Supported by the State Sciences and Technology Commission of China, with the 863 Hi-tech Research Program.

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Recent Progress of the Beijing FEL-Realizing Saturated Oscillation

  • 1. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing;
  • 2. Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Shanghai
Fund Project:  Supported by the State Sciences and Technology Commission of China, with the 863 Hi-tech Research Program.

Abstract: Beijing FEL facility has been built in IHEP, the saturated oscillation was obtained at a wavelength of 10.68 μm, on 28 Dec. 1993. The average output energy and the pulse width were measured to be 3 mJ, 2 μS, respectively. The corresponding oscillation power is greater than 220 kW, peak power is about 20MW, which is about 108 times higher than that of spontaneous emission. The FWHM of the FEL spectral bandwidth is less than 2%. The small signal gain is 32% per pass. The extraction efficiency is 0.48%. In the present experimental results,BEFL can be saturated by changing electron energy at the wavelength range of 9-11 μm,the maximum average output energy and extraction efficiency are 10 mJ, 0.52% respectively, the minimum spectral bandwidth of 0.5% has been achieved by shortening cavity length.

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