Experimental study of a high-gain harmonic-generation free-electron laser in the ultraviolet

Doyuran, A.; DiMauro, Louis F.; Graves, W.; Heese, R.; Johnson, E.; Krinsky, S.; Loos, H.; Murphy, J.B.; Rakowsky, G.; Rose, J.; Shaftan, T.; Sheehy, B.; Shen, Yuzhen; Skaritka, J.; Wang, Xijie; Yu, Li Hua

doi:10.1103/physrevstab.7.050701

Cited by 11 publications

(5 citation statements)

References 17 publications

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“…Introduction of a seed pulse (to avoid buildup from noise) significantly improves longitudinal coherence but creates new challenges to find a suitable seed source. Various seeding schemes have been proposed or carried out: seeding with high harmonics generated in a gas [7,8], self-seeding schemes [9], extraction of a harmonic after bunching at a long wavelength [high-gain harmonic generation (HGHG)] [10][11][12][13], or recently by echo-enabled harmonic generation [14].…”

Section: Introductionmentioning

confidence: 99%

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Vacuum ultraviolet circularly polarized coherent femtosecond pulses from laser seeded relativistic electrons

Cutic

Lindau

Thorin

et al. 2011

Phys. Rev. ST Accel. Beams

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We have demonstrated the generation of circularly polarized coherent light pulses at 66 nm wavelength by combining laser seeding at 263 nm of a 375 MeV relativistic electron bunch with subsequent coherent harmonic generation from an elliptical undulator of APPLE-II type. Coherent pulses at higher harmonics in linear polarization have been produced and recorded up to the sixth order (44 nm). The duration of the generated pulses depends on the temporal overlap of the initial seed laser pulse and the electron bunch and was on the order of 200 fs. Currently, this setup is the only source worldwide producing coherent fs-light pulses with variable polarization in the vacuum ultraviolet.

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Section: Introductionmentioning

confidence: 99%

“…The radiation from these sources [4][5][6][7][8][9][10][11][12][13][14] is linearly polarized since planar radiators were used. In the VUV regime, quarter wave plates converting linear to circular light are not available.…”

Section: Introductionmentioning

confidence: 99%

Vacuum ultraviolet circularly polarized coherent femtosecond pulses from laser seeded relativistic electrons

Cutic

Lindau

Thorin

et al. 2011

Phys. Rev. ST Accel. Beams

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“…Indeed, chirp-pulse amplification (CPA) schemes have long been proposed for generating short, high power FEL pulses (see, e.g., [14][15][16][17]). In the case of a CPA FEL, the TBP of the seeding overestimates the TBP of the final compressed x-ray pulse.…”

Section: -3mentioning

confidence: 99%

Laser phase errors in seeded free electron lasers

Ratner

Fry

Stupakov

et al. 2012

Phys. Rev. ST Accel. Beams

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Harmonic seeding of free electron lasers has attracted significant attention as a method for producing transform-limited pulses in the soft x-ray region. Harmonic multiplication schemes extend seeding to shorter wavelengths, but also amplify the spectral phase errors of the initial seed laser, and may degrade the pulse quality and impede production of transform-limited pulses. In this paper we consider the effect of seed laser phase errors in high gain harmonic generation and echo-enabled harmonic generation. We use simulations to confirm analytical results for the case of linearly chirped seed lasers, and extend the results for arbitrary seed laser envelope and phase.

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“…The process is similar to that of high-gain harmonic generation (HGHG) demonstrated at the DUV FEL [21,40,41]. One, two, and three-stage harmonic cascade FELs are shown in the return straights in Figure 1.…”

Section: Photon Production and X-ray Beamlinesmentioning

confidence: 65%

LUX: a design study for a linac-/laser-based ultrafast x-ray source

et al. 2004

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We describe the design concepts for a potential future source of femtosecond x-ray pulses based on synchrotron radiation production in a recirculating electron linac. Using harmonic cascade free-electron lasers (FEL's) and spontaneous emission in short-period, narrow-gap insertion devices, a broad range of photon energies are available with tunability from EUV to hard x-ray regimes. Photon pulse durations are controllable and range from 10 fs to 200 fs, with fluxes 10 7 -10 12 photons per pulse. Full spatial and temporal coherence is obtained for EUV and soft X-rays. A fiber laser master oscillator and stabilized timing distribution scheme are proposed to synchronize accelerator rf systems and multiple lasers throughout the facility, allowing timing synchronization between sample excitation and X-ray probe of approximately 20-50 fs.

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Experimental study of a high-gain harmonic-generation free-electron laser in the ultraviolet

Cited by 11 publications

References 17 publications

Vacuum ultraviolet circularly polarized coherent femtosecond pulses from laser seeded relativistic electrons

Vacuum ultraviolet circularly polarized coherent femtosecond pulses from laser seeded relativistic electrons

Laser phase errors in seeded free electron lasers

LUX: a design study for a linac-/laser-based ultrafast x-ray source

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