Measurement of femtosecond electron bunches using a rf zero-phasing method

Wang, D. X.; Krafft, Geoffrey; Sinclair, C. K.

doi:10.1103/physreve.57.2283

Cited by 79 publications

(57 citation statements)

References 5 publications

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“…The longitudinal bunch structure after the BC1 was measured by an RF zero-phasing method (Wang et al, 1998). A linear energy chirp was added along the bunch by the zerocrossing phase of the third C-band unit.…”

Section: Light Sourcementioning

confidence: 99%

A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station

et al. 2018

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The design and performance of a soft X-ray free-electron laser (FEL) beamline of the SPring-8 Compact free-electron LAser (SACLA) are described. The SPring-8 Compact SASE Source test accelerator, a prototype machine of SACLA, was relocated to the SACLA undulator hall for dedicated use for the soft X-ray FEL beamline. Since the accelerator is operated independently of the SACLA main linac that drives the two hard X-ray beamlines, it is possible to produce both soft and hard X-ray FEL simultaneously. The FEL pulse energy reached 110 mJ at a wavelength of 12.4 nm (i.e. photon energy of 100 eV) with an electron beam energy of 780 MeV.

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Section: Light Sourcementioning

confidence: 99%

A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station

et al. 2018

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“…The largest radiation bandwidth was obtained for an energy chirp of 0.58% rather than the expected value of 0.35%. This may suggest that the electron bunch length is longer than what we measured by the zero-phasing technique [10]. Another possibility is that this is due to the nonlinear energy chirp on the electron beam such as energy modulation due to space charge or rf curvature.…”

Section: Frequency Chirped Hghg Spectrum Measurementsmentioning

confidence: 42%

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

Doyuran

DiMauro

Graves

et al. 2004

Phys. Rev. ST Accel. Beams

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Saturation of a high-gain harmonic-generation free-electron laser (HGHG-FEL) at 266 nm has been accomplished at the Brookhaven National Laboratory/Deep Ultra Violet Free Electron Laser Facility (BNL/DUV-FEL) by seeding with an 800 nm Ti:sapphire laser. We describe the diagnostics used to characterize the electron beam and the FEL output. Analytic and simulation calculations of the HGHG output are presented and compared with the experimental data. We also discuss the chirped pulse amplification of a frequency chirped seed by an energy chirped electron beam. The third harmonic at 88 nm accompanying the 266 nm fundamental has been used in an ion pair imaging experiment in chemistry, the first application of the BNL/DUV-FEL.

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“…We will then discuss in detail using RF kicker cavity for bunch length measurement. One of the commonly used RF technique for measuring the bunch length is measure the electron beam energy spread in a dispersion region, and electron beam bunch length information is extracted using the relation between the energy spread and b unch length [24]. A Linac RF phase energy chirped technique with energy slit is developed at the ATF with sub-picosecond resolution ( figure 15).…”

Section: Rf Base Technique and Rf Kicker Cavitymentioning

confidence: 99%

Single-pass high-gain free electron laser electron beam diagnostics

Wang¹

2000

AIP Conference Proceedings

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Consensus reached in the last few years that fourth generation light source will most likely be a X -ray or a UV coherent source based on single-pass high-gain free electron laser (FEL), such as Self Amplified Spontaneous Emission (SASE), or seeded high-gain harmonic -generation (HGHG) free electron lasers. High -gain (> 10 7 ) required for single -pass FEL puts great constrain on the quality of electron beam, and demands detailed distribution information of electron beam in six -dimension. The typical accelerator system for single -pass FEL consists of a photocathode RF gun injection system, a linac and magnetic bunch compressors, and a long undulator. The major challenges in beam diagnostics for single -pass FEL are to characterize the pico-seconds high-brightness electron beam in six -dimension produced by photocathode RF gun injector, and impro ve the stability and reliability of the photocathode RF gun injection system. Characterization of short electron bunch (∼100 fs) produced by the compressors, and co-align the electron beam with FEL radiation inside long undulator are also critical for FEL performance. We will discuss many diagnostic techniques developed at the Brookhaven Accelerator Test Facility (ATF) for the photocathode RF gun injection system, present several techniques for femto-seconds bunch length measurement, especially RF kicker cavity. Tomography technique for both transverse and longitudinal phase space measurements is discussed. Concept of multiple alignment -laser stations is present for beam alignment in the long undulator.

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Measurement of femtosecond electron bunches using a rf zero-phasing method

Cited by 79 publications

References 5 publications

A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station

A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station

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

Single-pass high-gain free electron laser electron beam diagnostics

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