The Properties of Undulator Radiation

Kincaid, B. M.

doi:10.1007/978-94-011-0868-3_13

Cited by 16 publications

(9 citation statements)

References 29 publications

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“…Starting from the pioneering works (Coisson & Walker, 1986;Kim, 1986;Kim, 1987a;Kim, 1987b), a lot of literature is available, which deals with the generalization of the concept of radiance to the case of partially transverse coherent sources as Synchrotron Radiation (SR) and Free-Electron Laser (FEL) sources (Coisson & Walker, 1986;Kim, 1986;Kim, 1987a;Kim, 1987b;Hulbert & Weber, 1992;Howells & Kincaid, 1994;Bahrdt, 1997;Hulbert & Williams, 1992;Hulbert & Williams, 1998;Bosch, 1999;Attwood, 1999;Bosch, 2000;Ciocci et al, 2000;Duke, 2000;Thomson & Vaugham, 2001;Wiedemann, 2002;Onuki & Elleaume, 2003;Hofmann, 2004;Clarke, 2004;Talman, 2006;Williams, 2006;Tanaka & Kitamura, 2009;Bazarov, 2012;Huang, 2013;Tanaka, 2014;Geloni et al, 2015;Vartanyants & Singer, 2018). This generalization process required changing the working framework from pure geometrical optics to wave optics, backed up by statistical optics.…”

Section: Introductionmentioning

confidence: 99%

Effects of energy spread on brightness and coherence of undulator sources

et al. 2018

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The (spectral) brightness for partially transverse coherent sources such as synchrotron radiation and free-electron laser sources can be defined as the maximum of the Wigner distribution. Then, the brightness includes information on both coherence and wavefront characteristics of the radiation field. For undulator sources, it is customary to approximate the single-electron electric field at resonance with a Gaussian beam, leading to great simplifications. Attempts to account for the modified spatial and angular profile of the undulator radiation in the presence of detuning due to energy spread, currently build on the simplified brightness expression derived under the assumption of Gaussian beams. The influence of energy spread on undulator radiation properties is becoming important in view of diffraction-limited rings with ultralow emittance coming on-line. Here the effects of energy spread on the brightness of undulator radiation at resonance are discussed, as well as relevant relations with coherence properties.

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Section: Introductionmentioning

confidence: 99%

Effects of energy spread on brightness and coherence of undulator sources

et al. 2018

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“…The exact details of the fringe field region of upstream and downstream bend magnets makes the possible advantage of TUR difficult to predict, and measurements should be done. Some work has been done predicting total power radiated in the fringe field region, [3] and this could be expanded to improve the estimates used above.…”

Section: Resultsmentioning

confidence: 99%

Long-wavelength end-effect undulator radiation (Transition Undulator Radiation)

Kincaid

1998

Nouv Cim D

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“…According to the undulator radiation physics, the spectral power per unit solid angle of a single electron in an undulator leads to the following expressions [40]: …”

Section: Coherent Photon Beam Based Methodsmentioning

confidence: 99%

Coherent photon beam based diagnostics for a seeded extreme ultraviolet free-electron laser

Feng

Deng

Dai

et al. 2014

Phys. Rev. ST Accel. Beams

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Independently from conventional electron beam based procedures, the photon beam based diagnostic is an alternative way for electron trajectory alignment and commissioning of numerous undulator cells in high-gain short-wavelength free-electron lasers (FELs). In this paper, using the microbunched electron beam and the undulator fine-tuning technique, a novel method based on the spatial profile analysis of coherent harmonic radiation from individual or two consecutive undulator segments, the so-called coherent photon beam based diagnostic, is proposed for undulator alignment and commissioning in seeded FELs. The preliminary experimental results at the Shanghai deep ultraviolet FEL test facility are presented. It shows that the proposed method is effective and convenient in the electron beam trajectory control, the undulator magnetic gap verification, and the phase match between two undulator segments.

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The Properties of Undulator Radiation

Cited by 16 publications

References 29 publications

Effects of energy spread on brightness and coherence of undulator sources

Effects of energy spread on brightness and coherence of undulator sources

Long-wavelength end-effect undulator radiation (Transition Undulator Radiation)

Coherent photon beam based diagnostics for a seeded extreme ultraviolet free-electron laser

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