A Limitation On The Start-up Of Compact Free Electron Lasers
28 Aug 1989-pp 348-350
TL;DR: An FEL using a short-period undulator with small undulator parameter K can have a classical gain above threshold, but may not start The fundamental limitation arises from quantum fluctuations and depends on the Compton wavelength.
Abstract: An FEL using a short-period undulator with small undulator parameter K can have a classical gain above threshold, but may not start The fundamental limitation arises from quantum fluctuations and depends on the Compton wavelength
Citations
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01 Dec 1983
TL;DR: In this article, the authors summarized the existing knowledge on XUV operation of Free-Electron Lasers and showed that the standard classical classical anlaysis is valid until about 1 Angstrom wavelength if a high energy electron beam is used.
Abstract: We briefly summarize the existing knowledge on XUV operation of Free-Electron Lasers. The standard classical anlaysis is valid until about 1 Angstrom wavelength if a high energy electron beam is used. If a low energy beam is used, the limiting wavelength is larger. Other topics discussed are electron shot noise, photon statistics, photon and electron quantum effects, coherence, high-gain collective effects, higher harmonics, and transverse optical effects.
References
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TL;DR: In this paper, the Weizsacker-Williams method is used to calculate the gain due to the induced emission of radiation into a single electromagnetic mode parallel to the motion of a relativistic electron through a periodic transverse dc magnetic field.
Abstract: The Weizsacker‐Williams method is used to calculate the gain due to the induced emission of radiation into a single electromagnetic mode parallel to the motion of a relativistic electron through a periodic transverse dc magnetic field. Finite gain is available from the far‐infrared through the visible region raising the possibility of continuously tunable amplifiers and oscillators at these frequencies with the further possibility of partially coherent radiation sources in the ultraviolet and x‐ray regions to beyond 10 keV. Several numerical examples are considered.
929 citations
23 Jul 1988
TL;DR: The fundamentals of free electron laser theory are now well-established and can provide a sophisticated description of experiments over a wide range of parameters as mentioned in this paper, and the theory remains the same for systems working from 1mm to 10nm wavelengths.
Abstract: The fundamentals of free electron laser theory are now well-established and can provide a sophisticated description of experiments over a wide range of parameters. While new technology is being developed for systems working from 1mm to 10nm wavelengths, the theory remains the same.
14 citations
TL;DR: In this paper, the temporal structure of the optical pulses using optical autocorrelation techniques was studied on the Stanford Free Electron Laser (FEL) with improved electron beam characteristics, and experiments carried out to study the intrinsic second harmonic radiation and the effects of the superimposed solenoidal magnetic field on laser operation.
Abstract: New data has been taken on the Stanford Free Electron Laser (FEL) with improved electron beam characteristics. For the first time we have studied the temporal structure of the optical pulses using optical autocorrelation techniques. The new data is compared and contrasted with earlier data. Several puzzling aspects of the previous data appear correlated with drifts in the spectrum and current of the electron beam. Autocorrelation results indicate nearly transform limited pulses which are shorter than expected at large values of the cavity length detuning. We also report here experiments carried out to study the intrinsic second harmonic radiation and the effects of the superimposed solenoidal magnetic field on laser operation.
11 citations
01 Dec 1983
TL;DR: In this paper, the authors summarized the existing knowledge on XUV operation of Free-Electron Lasers and showed that the standard classical classical anlaysis is valid until about 1 Angstrom wavelength if a high energy electron beam is used.
Abstract: We briefly summarize the existing knowledge on XUV operation of Free-Electron Lasers. The standard classical anlaysis is valid until about 1 Angstrom wavelength if a high energy electron beam is used. If a low energy beam is used, the limiting wavelength is larger. Other topics discussed are electron shot noise, photon statistics, photon and electron quantum effects, coherence, high-gain collective effects, higher harmonics, and transverse optical effects.
1 citations
01 Dec 1983
TL;DR: The operation of free electron lasers in the 500-100 A region is reviewed in this paper, where theoretical aspects of FEL operation are discussed; they exclude the electron shot noise, photon statistics, photon and electron quantum effects, coherence, high gain collective effects, higher harmonics and transverse optical modes.
Abstract: The operation of free electron lasers in the 500–100 A region is reviewed. Theoretical aspects of FEL operation are discussed; they exclude the electron shot noise, photon statistics, photon and electron quantum effects, coherence, high‐gain collective effects, higher harmonics and transverse optical modes. A brief summary of the existing knowledge on these topical is presented. (AIP)
1 citations