Journal Article10.1016/J.NIMA.2004.11.033
A simple method for experimental spectral ratio calculation of CHG-FEL
TL;DR: In this article, the experimental spectral ratio is calculated according to the experimental integral ratio, the bandwidth and solid angle aperture of the measurement system and the parameters of the coherent harmonic generation free-electron laser (CHG-FEL).
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Abstract: Coherent harmonic generation free-electron laser (CHG-FEL) acts as a harmonic amplifier of the seed laser. The spectral ratio, which is defined as the ratio of coherent radiation intensity and incoherent radiation intensity in infinitesimal bandwidth and solid angle aperture, can evaluate the performance of the CHG-FEL. In the experiment, we can only get the experimental integral ratio integrated over the actual bandwidth and solid angle aperture of the radiation measurement system. Because the coherent radiation and incoherent radiation are very different in the spatial and spectral structure, the experimental integral ratio is greatly influenced by the measurement system and cannot be directly used to evaluate the performance of the CHG-FEL. So, we must calculate the experimental spectral ratio according to the experimental integral ratio, the bandwidth and solid angle aperture of the measurement system and the parameters of the CHG-FEL. Our work provides a simple method for the calculation of experimental spectral ratio.
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References
High-gain harmonic-generation free-electron laser.
Li-Hua Yu,M. Babzien,Ilan Ben-Zvi,Louis F. DiMauro,A. Doyuran,William Graves,Erik D. Johnson,Samuel Krinsky,R. Malone,Igor Pogorelsky,John Skaritka,George Rakowsky,L. Solomon,Xuelong Wang,M. Woodle,Vitaly Yakimenko,Sandra Biedron,John Galayda,Efim Gluskin,J. Jagger,V. Sajaev,Isaac Vasserman +21 more
TL;DR: The approach uses a laser-seeded free-electron laser to produce amplified, longitudinally coherent, Fourier transform-limited output at a harmonic of the seed laser, with the ultimate goal of extending the approach to provide an intense, highly coherent source of hard x-rays.
498
Coherent harmonic generation in VUV with the optical klystron on the storage ring Super-ACO
Rui Prazeres,P. Guyot-Sionnest,Jean-Michel Ortega,Jean-Michel Ortega,Dino A. Jaroszynski,Dino A. Jaroszynski,M. Billardon,M. Billardon,M.E. Couprie,M.E. Couprie,M. Velghe,Y. Petroff +11 more
TL;DR: In this article, the nonlinear properties of the free electron laser gain that result when an electron beam is bunched by an external pulsed laser have been explored for the purpose of producing coherent light in the VUV spectral range.
37
Coherent harmonic generation in the vacuum ultraviolet spectral range on the storage ring ACO
Rui Prazeres,Jean-Michel Ortega,C. Bazin,M. Bergher,M. Billardon,M.E. Couprie,M. Velghe,Y. Petroff +7 more
TL;DR: In this paper, the authors summarize the various achievements made at Orsay on the coherent harmonic generation, using an external laser focused in an optical klystron, and the perspectives offered for VUV production by the new storage ring Super-ACO, taking into account the parameters recently measured on this ring.
32
Ultraviolet coherent generation from an optical klystron
J. M. Ortega,Y. Lapierre,B. Girard,M. Billardon,P. Elleaume,C. Bazin,M. Bergher,M. Velghe,Y. Petroff +8 more
TL;DR: In this article, the optical klystron was used as a nonlinear medium for producing harmonics of an external 1.06 μm Nd:YAG laser focused into it.
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