New varieties of helical undulators

Balal, Nezah; Bratman, V. L.; Magory, Eyal

doi:10.1016/j.nima.2020.163895

Cited by 12 publications

(3 citation statements)

References 9 publications

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“…There is a number of known solutions for short-period undulators, such as permanent-magnet systems, 13,14 plasma undulators, 15,16 and electromagnetic wave undulators, including microwave [17][18][19] and laser 20 systems. However, most of these solutions are fairly complicated or result in high power consumption.…”

Section: Discussionmentioning

confidence: 99%

“…An attractive option for high-power pulse generation in terahertz and/or far infrared bands is to exploit the radiation of photoinjectorformed 11,12 picosecond 3-5 MeV electron bunches moving in microundulators. [13][14][15][16][17][18][19][20][21] An additional advantage of micro-undulators, as compared to the conventional undulators, is that their use drastically decreases the sensitivity of SR emission to electron energy and velocity spreads due to decreased total interaction length.…”

Section: Introductionmentioning

confidence: 99%

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Terahertz super-radiance from picosecond electron bunches moving through a micro-undulator

Ginzburg,

Vilkov,

Malkin

et al. 2024

Physics of Plasmas

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We suggest using emission from the photoinjector-formed electron bunches moving through micro-undulators for generation of powerful super-radiant pulses in the terahertz/far infrared frequency range. Within the time-domain quasi-optical approach, we demonstrate the spatial coherence of emission with narrow angular spectrum from the electron bunches with transverse size limited by the Fresnel parameter NF ∼ 1, when the diffraction effects together with slippage provide synchronization of radiation from the entire volume of the extended bunch. For picosecond-duration, 5 MeV, 250 pC electron bunches, and a micro-undulator with a period of 3 mm, the peak power of 15 THz SR pulses can be about of 20 MW.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Terahertz super-radiance from picosecond electron bunches moving through a micro-undulator

Ginzburg,

Vilkov,

Malkin

et al. 2024

Physics of Plasmas

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“…The helical undulator in infinite solenoid [16], a peculiar system with 3 first order integrals not separable in orthogonal coordinates on the configuration space, remains the sole superintegrable example (also in the relativistic setting [10]) and is relevant e.g. for the study of free electron lasers [1].…”

Section: Introductionmentioning

confidence: 99%

Integrable systems in magnetic fields: the generalized parabolic cylindrical case

Kubů,

Marchesiello,

Šnobl

2024

J. Phys. A: Math. Theor.

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This article is a contribution to the classification of quadratically integrable systems with vector potentials whose integrals are of the nonstandard, nonseparable type. We focus on generalized parabolic cylindrical case, related to non-subgroup-type coordinates. We find three new systems, two with magnetic fields polynomial in Cartesian coordinates and one with unbounded exponential terms. The limit in the parameters of the integrals yields a new parabolic cylindrical system; the limit of vanishing magnetic fields leads to the free motion. This confirms the conjecture that non-subgroup type integrals can be related to separable systems only in a trivial manner.

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