Observation of Stimulated Compton Scattering of Electrons by Laser Beam

Bartell, Lawrence S.; Thompson, H. Bradford; Roskos, Roland Rufus

doi:10.1103/physrevlett.14.851

Cited by 56 publications

(10 citation statements)

References 2 publications

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“…These results are consistent with the description of the ponderomotive potential in the frame of classical physics. From the QED view point, this kind of momentum exchange can be regarded as stimulated Compton scattering, which was predicted by Kapitza and Dirac [16] and demonstrated in experiment [8]. …”

Section: Normally Incident Casementioning

confidence: 88%

“…This is because ordinary electronphoton scattering (conventional Compton scattering) is too weak to produce such a noticeable energy exchange, and the stimulated Compton scattering [8], which is possible since the beam can be Fourierexpanded with components, all of which are plane waves. traveling in slightly different directions with the same frequency, can only lead to momentum transfer between electrons and lasers.…”

Section: Introductionmentioning

confidence: 99%

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Article

Wang¹,

Ho²,

Scheid³

et al. 1998

Can. J. Phys.

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By calculation of the classical Newton-Lorentz equation and neglecting the radiation reaction, we find that when an electron is scattered by an intense continuous monochromatic laser beam (' e.*E6 i /S : f in the interaction region), there can be not only momentum transfer but also noticeable energy transfer between the free electrons and the laser beam. This kind of inelastic effect comes from nonlinear Compton scattering. PACS Nos.: 42.50Vk and 42.50 Hz Résumé : Ce papier présente les résultats de l'intégration numérique de l'équation classique de Newton-Lorentz en négligeant la réaction de radiation. Nous trouvons que lorsque l'électron est diffusé par un champ laser monocromatique intense (' e.*E6 i /S : f dans la région d'interaction), il n'y a pas uniquement transfert de moment, mais aussi transfert notable d'énergie entre l'électron et le champ laser. Ce type d'effet inélastique vient de la diffusion non-linéaire de Compton. [Traduit par la rédaction]

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Section: Normally Incident Casementioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Article

Wang¹,

Ho²,

Scheid³

et al. 1998

Can. J. Phys.

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show abstract

“…The underlying mechanism of the electron capture All the above discussions are using continuous laser beam, in which the SCS(Stimulated Compton scattering) [18] does not contribute to the electron energy change. To see clearly what underlies the electron obtained energy, we must resort to the analysis of the electron scattering by pulsed laser beam.…”

Section: 4mentioning

confidence: 99%

Laser-based electron acceleration to GeV in free space

Wang

Lin

et al. 2000

SPIE Proceedings

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Iii this paper, the free-electron scattering by continuous or pulsed laser beams has been investigated in details. It is found that when Q E eE/(rrtwc) 100 an electron can be captured and violently accelerated to GeV energy under PrI)eI conditions. From the quantum viewpoint, we can explain this effect on the basis of non-linear and stimulated Compton scatterings. This phenom'ion provided us with a new far-field laser acceleration mechanism,whose practical feasibility and application possibility are also discussed.Keywords: free electron scattering, intense lasers, non-linear Compton scattering . IntroductionEver since the emergence of the first accelerator in England, the accelerator beam energy has been increased about one magnitude every ten years [1]. And at the same time, the building expenses and complexity rises drastically. But higher and higher energies are needed in particle physics. To solve the above dilemma, people begin to investigate new acceleration mechanism long ago, among which the laser acceleration is the most attractive one. Compared with the 2OMV/m acceleration gradient provided by present linear accelerators, the 1O7MV/m electric field gradient of the laser fields have made the laser acceleration a very promising way to increase the particle energy and decrease the accelerator size. But laser acceleration has its own problems. For instance, most of previous acceleration mechanisms have medium involved, such as gas[2}, plasma{3] etc., in order to slow down the phase speed of the laser fields. To overcome the problem of various non-stabilities inherent in the plasmas/matter interaction, we resort to the far-field free electron accelerations in vacuum. In this research area, there is a long-standing question that is whether an electron can get net energy gain from the laser beam in free space. According to the so-called Lawson-Wooclworth theorem arid previous research[4], the electron can obtain no energy gain through the whole interaction. But this conclusion is only confined to low-intensity laser fields since they either use the Born approximation(i.e. 1 / 'y2 is neglected in theoretical processing), or under-evaluate the interpose effect of different plane wave modes. To give a more exact answer to the above question, we devise a realistic laser beam satisfying Maxwell's equations and then inject the electron upon it to see how the electron ener' changes before and after the interaction. The results are very interesting and significant. For stationary laser beams, as Q < 0. 1 , there is no energy transfer between the electron arid the laser beam. As Q increases from 0. 1 to more than 10, the electron begins to obtain more and more net energies, which is of MeV magnitude when Q ''lO. The most surprising and meaningful results are that as Q ', 100 , the electron can be captured and accelerated to GeV energy. To pulsed laser beanis, we can have similar results when Q . ; 100. The underlying physical mechanism of such high net energy exchange has been discussed in Section 3.5. Here we have in...

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“…by virtue of the definition of s. For experimental reasons the integrated intensity of the Bragg reflection is of more practical interest than the angular profile of Equation 17. The integrated intensity for a first order reflection…”

Section: Standing Wave Of Monochromatic Lightmentioning

confidence: 99%

Stimulated compton scattering of electrons by a laser beam

Roskos

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Observation of Stimulated Compton Scattering of Electrons by Laser Beam

Cited by 56 publications

References 2 publications

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Laser-based electron acceleration to GeV in free space

Stimulated compton scattering of electrons by a laser beam

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