Variable-Wiggler Free-Electron-Laser Oscillation

Edighoffer, J.; Neil, George; Hess, Carl; Smith, T. I.; Fornaca, S.; Schwettman, H. A.

doi:10.1103/physrevlett.52.344

Cited by 92 publications

(11 citation statements)

References 8 publications

(4 reference statements)

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“…Also shown in the figure of the power of a slice of the electromagnetic pulse trapped is the calculated resonant frequency using a one-dimen-inside the resonator. Starting at the upstream end at the sional model [ 17], which is found to predict shorter wave-background noise level P,). the power first grows with the lengths than those observed.…”

Section: Undulator Field (G)mentioning

confidence: 94%

“…(18) gives the growth rate as Im(6w) _.0.6 x 10 9 /sec. nonresonant terms as well as the n = I = I resonant terms and expand the frequency about the real part w,, : IIIAPPARATUS w = w, + 6w, wherew, satisifes (11) and (12) Radiation emerging from the drift tube passes through a vacuum window (polyethylene, or an aluminized z-cut 2du 2/2 (wa/7w,)(wo +>kV..) quartz mirror), is filtered by a high pass (A < 4 mm) filter, and (17)'is guided into a shielded room for spectroscopic analysis via a 2.5-cm-diam light pipe. Measurement of total power is above which the growth rate is given by:…”

Section: Nismmentioning

confidence: 99%

See 1 more Smart Citation

Theoretical and Experimental Research on a Millimeter-Wavelength Free-Electron Laser

Marshall¹

1989

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Section: Undulator Field (G)mentioning

confidence: 94%

Section: Nismmentioning

confidence: 99%

Theoretical and Experimental Research on a Millimeter-Wavelength Free-Electron Laser

Marshall¹

1989

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“…The second worldwide FEL oscillation was then obtained in 1983 on the ACO storage ring, in the visible [42], and then followed by Coherent harmonic generation [43,44] in the UV and VUV usng a Nd-Yag laser. The Stanford FEL has been operated with a tapered undulator in order to enhance the efficiency [45], enabling the output power to be enlarged [46]. FEL oscillation was obtained at Los Alamos in 1983 at 9 − 11 µm, with nine orders of magnitude of power growth and a net gain of 17 %, leading to an intra-cavity peak power of 20 MW [47].…”

Section: The Free Electron Laser Inventionmentioning

confidence: 99%

Towards compact Free Electron–Laser based on laser plasma accelerators

Couprie

2018

Nuclear Instruments and Methods in Physics Research Section A:

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The laser invention more than fifty years ago was a major scientific revolution. Among the different possible gain media, the Free Electron Lasers (FEL) uses free electrons in the period permanent magnetic field of an undulator, covering wavelengths from far infra red to X-ray, with easy tuneability and high peak power. Nowadays, the advent of tuneable intense (mJ level) short pulse FELs with record peak power (GW level) in the X-ray domain sets a major step in laser development, and enables to explore new scientific areas, such as deciphering molecular reactions in real time, understanding functions of proteins. Besides, lasers have also been considered for driving plasma electron acceleration. A high-power femtosecond laser is focused into a gas target and resonantly drives a nonlinear plasma wave in which plasma electrons are trapped and accelerated with high energy gain of GeV/m. Nowadays, laser wakefield acceleration became reality and electron beams with multi-GeV energies, hundreds pC charge, sub-percent energy spread and sub-milliradian divergence can be produced. It is relevant to consider a FEL application to quality these laser plasma produced electrons. After having described the FEL panorama, the strategies towards laser plasma based acceleration based FELs will be discussed, including the mitigation of the large energy spread and divergence of these beams should be mitigated.

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“…It is worth noting that the first FEL [43] and the first tapered wiggler oscillator [44] and the first visible lasing on a linac based FEL [45] operated using the Stanford Superconducting Accelerator. Since its original demonstration this linac has been a workhorse serving several generations of FELs since the CW beam yields high stability of the power, wavelength, phase, and pulse length.…”

Section: A Acceleratorsmentioning

confidence: 99%

Free-electron lasers: vacuum electronic generators of coherent radiation

Freund

Neil²

1999

Proc. IEEE

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Vacuum electronic sources have shown marked improvement since the invention of the magnetron before World War II, and dramatic increases in both average powers and frequencies have been achieved. Of course, much of these gains have been achieved by the development of different devices. The typical development pattern for a given device exhibits an initial period of rapid improvement followed by a plateau determined by technological or physical limitations on the concept. Slow wave devices such as magnetrons and/or klystrons operate efficiently at frequencies up through X-band or he source of the relation ed cavity traveling wave tubes are used for various applications at frequencies ranging up through W-band. At still higher frequencies fast wave devices such as gyrotrons and free-electron lasers are required are required for high power operation.The free-electron laser concept is unique in that the mechanism is applicable across the entire electromagnetic spectrum, and free-electron lasers have been built at wavelengths from microwaves through the ultraviolet, and plans are under development for X-ray systems. Our purpose of this paper is to describe the principal directions of free-electron laser research at the present time. To this end, we first give a brief tutorial of the physics underlying the concept, and then describe the principal development paths under way.

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Variable-Wiggler Free-Electron-Laser Oscillation

Cited by 92 publications

References 8 publications

Theoretical and Experimental Research on a Millimeter-Wavelength Free-Electron Laser

Theoretical and Experimental Research on a Millimeter-Wavelength Free-Electron Laser

Towards compact Free Electron–Laser based on laser plasma accelerators

Free-electron lasers: vacuum electronic generators of coherent radiation

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