Beam dynamics in Compton ring gamma sources

Bulyak, Eugene; Gladkikh, P.; Skomorokhov, Vladislav; Omori, T.; Urakawa, J.; Mönig, K.; Zimmermann, F.

doi:10.1103/physrevstab.9.094001

Cited by 5 publications

(6 citation statements)

References 8 publications

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“…These monoenergetic and tunable Compton photon beams find numerous industrial, medical, and scientific applications. In particular, they bring a great deal of attention in the view of future colliders such as the International Linear Collider (ILC) [1], the Compact Linear Collider (CLIC) [2], and the Super B [3], which are planned to use the Compton γ rays to produce highly polarized positrons. Taking into account those various applications and research interests, it becomes of great importance to predict theoretically spectral and spatial distributions of Compton photon beams, and to control their properties using the incident beam parameters.…”

Section: Introductionmentioning

confidence: 99%

Compton process in intense short laser pulses

2012

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The spectra of Compton radiation emitted during electron scattering off an intense laser beam are calculated using the framework of strong-field quantum electrodynamics. We model these intense laser beams as finite length plane-wave-fronted pulses, similar to Neville and Rohrlich [Phys. Rev. D 3, 1692 (1971)], or as trains of such pulses. Expressions for energy and angular distributions of Compton photons are derived such that a comparison of both situations becomes meaningful. Comparing frequency distributions for both an isolated laser pulse and a laser pulse train, we find a very good agreement between the results for long pulse durations which breaks down however for ultrashort laser pulses. The dependence of angular distributions of emitted radiation on a pulse duration is also investigated. Pronounced asymmetries of angular distributions are found for very short laser pulses, which gradually disappear with increasing the number of laser field oscillations. Those asymmetries are attributed to asymmetries of the vector potential describing an incident laser beam.

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Section: Introductionmentioning

confidence: 99%

Compton process in intense short laser pulses

2012

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“…According to a beam dynamics study [27], interaction of electrons with laser photons does not affect the transverse motion. On the other hand, the longitudinal dynamics is quite challenging; The eneigy acceptance of the ring should be unusually large.…”

Section: Cr and Erl Beam Dynamicsmentioning

confidence: 99%

“…This pulse train is stored in a high-finesse optical cavity, which enhances its effective pulse eneigy by 10^. Compton scattering of the electron and photon beams in CR generates gamma rays and number of gamma rays in effective eneigy region (22)(23)(24)(25)(26)(27)(28)(29) is estimated to be 6.9 x lO^ys/bunch/tum and number of positrons converted and captured is 9.8 x 10''e + /bunch/turn. This positron generation is continued 102;Us period, where 450 bunches are stacked in a same bucket and 4.5 x 10^ positron/bunch is obtained in Pre-DR.…”

Section: Ring Schemementioning

confidence: 99%

ILC Positron Source Based on Laser Compton

Kuriki

Araki

Higashi

et al. 2008

AIP Conference Proceedings

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International audiencePositron generation is one of the most difficult technical challenges among the ILC (International Linear Collider) subsystems. A positron source based on Laser Compton back scattering is an attractive and advanced option for the ILC positron source. Here, the positrons are generated, via the pair creation process, from high energy gamma rays which themselves are produced by Compton scattering of laser photons off a high-energy electron beam. Polarized positrons can be generated by employing a circularly polarized laser. The positron polarization is easily controlled and switched by changing the laser polarity. The electron beam can be unpolarized. The required electron energy is only a few GeV (in contrast, the “undulator scheme”, another advanced option, requires at least 100 GeV or more) and the system can be prototyped and tested prior to the real construction. The laser Compton technology has many other applications like advanced X-ray sources and a good synergy is expected. In addition, this technology can be a powerful driving force for the ILC project attracting many researchers from outside the ILC community. The ILC positron source is a technical challenge and it will be realized only if the latest technologies are integrated seamlessly with the necessary R&D efforts for system specific issues. The latest technologies include high power lasers, high brightness electron beams, high finesse optical cavities for as laser-beam interaction point, etc. We present the design status and the related experimental efforts for the ILC positron source based on Laser Compton scattering. The respective advantages of various options for the electron beam (based on Linac, storage ring, and ERL) are also compared

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“…Then, in [25], the authors proposed a compact laser-electron storage ring in the tens of MeV energy range for electron beam cooling and X-ray generation. At higher energy (few GeV) CBS can be employed for gamma ray generation [26] aiming at the nuclear applications and positron production.…”

Section: A Beam Dynamicsmentioning

confidence: 99%

Equilibrium energy spread and emittance in a Compton ring: An alternative approach

Chaikovska

Variola

2014

Phys. Rev. ST Accel. Beams

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In this article the Campbell's theorem is used to evaluate the equilibrium emittance and energy spread in a Compton ring. This method allows us to have an efficient analytical approach separating the contributions of the Compton cross section from the luminosity factor. The consequent advantage is given by the possibility to have an easy extrapolation for the "nonclassical" cases like the polarized Compton backscattering or the evaluation of the equilibrium given by different radiation mechanisms. The effects accounting for the polarized Compton backscattering in the article are evaluated numerically. The analytical results in the nonpolarized case and in the negligible recoil effect approximation are in excellent agreement with the values obtained by matching the Compton damping rate with the quantum fluctuations, and they show that the equilibrium energy spread and emittance are independent from the luminosity.

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Beam dynamics in Compton ring gamma sources

Cited by 5 publications

References 8 publications

Compton process in intense short laser pulses

Compton process in intense short laser pulses

ILC Positron Source Based on Laser Compton

Equilibrium energy spread and emittance in a Compton ring: An alternative approach

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