Preliminary study of EEHG-based superradiant undulator radiation at the HLS-II storage ring

Wei-Wei Gao; He-Ting Li; Lin Wang

doi:10.1088/1674-1137/41/7/078101

Chinese Physics C> 2017, Vol. 41> Issue(7) : 078101 DOI: 10.1088/1674-1137/41/7/078101

Preliminary study of EEHG-based superradiant undulator radiation at the HLS-II storage ring

1.
College of Mathematics and Physics, Fujian University of Technology, Fuzhou 350118, China
2.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

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Abstract：
We investigate storage ring-based Echo-Enabled Harmonic Generation (EEHG) superradiant undulator radiation as a possible scheme to obtain shorter wavelengths at the HLS-II (Hefei Light Source-II) storage ring. In this paper we give the designation of the storage ring based EEHG up to the 26th harmonic, where 31 nm vacuum ultraviolet light is radiated from an 800 nm seeded laser. The novelty of our design is that both the two dispersion sections of EEHG are realized by the storage ring's own magnet structure. In particular, the whole ring is used as the first dispersion section, and two modulators of the traditional EEHG can be done with the same undulator. These two dispersion sections are realized by changing the superperiod of the present lattice structure, and more precisely by changing the focusing strengths of the present structure. Since no additional magnets and chicanes are used, the beam circulates around the storage ring repeatedly, and thus this storage ring-based EEHG can have a higher repetition rate than a linac-based EEHG.
- storage ring ,
- EEHG ,
- lattice

References

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[1] Xu Jianming . Matching Problem of Lattice with Transverse Coupling. Chinese Physics C, 1995, 19(1): 73-81.
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Wei-Wei Gao, He-Ting Li and Lin Wang. Preliminary study of EEHG-based superradiant undulator radiation at the HLS-II storage ring[J]. Chinese Physics C, 2017, 41(7): 078101. doi: 10.1088/1674-1137/41/7/078101

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Received: 2016-11-21
Revised: 2017-03-25

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Supported by National Natural Science Foundation of China (11305170)

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Preliminary study of EEHG-based superradiant undulator radiation at the HLS-II storage ring

Corresponding author: Wei-Wei Gao,

1. College of Mathematics and Physics, Fujian University of Technology, Fuzhou 350118, China
2. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

Received Date: 2016-11-21
Accepted Date: 2017-03-25
Available Online: 2017-07-05

Fund Project: Supported by National Natural Science Foundation of China (11305170)

Abstract: We investigate storage ring-based Echo-Enabled Harmonic Generation (EEHG) superradiant undulator radiation as a possible scheme to obtain shorter wavelengths at the HLS-II (Hefei Light Source-II) storage ring. In this paper we give the designation of the storage ring based EEHG up to the 26th harmonic, where 31 nm vacuum ultraviolet light is radiated from an 800 nm seeded laser. The novelty of our design is that both the two dispersion sections of EEHG are realized by the storage ring's own magnet structure. In particular, the whole ring is used as the first dispersion section, and two modulators of the traditional EEHG can be done with the same undulator. These two dispersion sections are realized by changing the superperiod of the present lattice structure, and more precisely by changing the focusing strengths of the present structure. Since no additional magnets and chicanes are used, the beam circulates around the storage ring repeatedly, and thus this storage ring-based EEHG can have a higher repetition rate than a linac-based EEHG.