Inverse Compton scattering X-ray source yield optimization with a laser path folding system inserted in a pre-existent RF linac

Chaleil, A.; Flanchec, V. Le; Binet, A.; Negre, J. P.; Devaux, J. F.; Jacob, V.; Millerioux, M.; Bayle, A.; Balleyguier, P.; Prazérès, R.

doi:10.1016/j.nima.2016.10.008

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…But, the minimal time spacing of 15 ns between each γ-ray pulse required for the GBS ruled out this optical configuration for the interaction point. Multi-pass non-resonant cavity studies have been carried out for inverse Compton scattering source [17][18][19][20] and have shown to be adapted to low number of bunches and tens of nanoseconds circulation period. The multi pass non-resonant cavity or laser beam circulator designed for the GBS has got the particularity to achieve constant interaction parameter (angle, waist, polarization) at a fixed interaction point all along the passes.…”

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confidence: 99%

Low power commissioning of an innovative laser beam circulator for inverse Compton scattering γ -ray source

Ndiaye¹,

Cassou²,

Cornebise³

et al. 2019

Phys. Rev. Accel. Beams

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We report on the optical commissioning of the high power laser beam circulator (LBC) for the high brightness Compton γ-ray source Extreme Light Infrastructure for Nuclear Physics. Tests aiming at demonstrating the optical performances of the LBC have been realized with a low-power pulsed laser-beam system and without electron beam. We show that, with the developed alignment and synchronization methods coming from the LBC design study presented in the Dupraz et al. paper [1], the LBC enhances the laser-beam power available at the interaction point (IP) by a factor in excess of 25. This corresponds to a potential of bringing the average laser-beam power in excess of 1 kW when the LBC is injected with the interaction point laser-beam pulse energy of 400 mJ at 100 Hz.

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confidence: 99%

Low power commissioning of an innovative laser beam circulator for inverse Compton scattering γ -ray source

Ndiaye¹,

Cassou²,

Cornebise³

et al. 2019

Phys. Rev. Accel. Beams

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“…• Combining a warm s-band linac and a pulsed laser: a 30 keV, femtosecond x-ray beam was generated with a 90 • cross-angle at Berkeley National Laboratory [280]; a very high peak flux x-ray beam (2 × 10 9 up to 10 10 ph/pulse) was produced at Vanderbilt University [281]; a 52 keV x-ray beam was generated at Tsinghua University, China with controllable polarization [282,283]; and an 11 keV x-ray beam was produced at CEA, France, by utilizing a ring-down laser cavity with a folded laser path [284]; • With a linac FEL: tunable 7 to 12 keV x-rays were demonstrated at CLIO, France, using an infrared linac FEL powered by the same electron beam [285]; • With a superconducting linac: a tunable 3.5 to 18 keV, high average flux (few 10 9 ph/s)…”

Section: Compton X-ray Sourcesmentioning

confidence: 99%

“…Various optical systems have been used to increase the available laser beam intensity in Compton scattering experiments. Firstly, 'recirculator' systems [350] have demonstrated effective laser beam energy gains with an enhancement factor between 8 [284] and 20 [351] (an enhancement factor of about 30 is foreseen in reference [352]). Secondly, a FP cavity (optical resonator), a well-known optical device [353][354][355], can provide gain in excess of 10 3 .…”

Section: Photon Beam Systemsmentioning

confidence: 99%

International workshop on next generation gamma-ray source

Howell¹,

Ahmed²,

Afanasev³

et al. 2021

J. Phys. G: Nucl. Part. Phys.

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A workshop on The Next Generation Gamma-Ray Source sponsored by the Office of Nuclear Physics at the Department of Energy, was held November 17-19, 2016 in Bethesda, Maryland. The goals of the workshop were to identify basic and applied research opportunities at the frontiers of nuclear physics that would be made possible by the beam capabilities of an advanced laser Compton beam facility. To anchor the scientific vision to realistically achievable beam specifications using proven technologies, the workshop brought together experts in the fields of electron accelerators, lasers, and optics to examine the technical options for achieving the beam specifications required by the most compelling parts of the proposed research programs. An international assembly of participants included current and prospective γ-ray beam users, accelerator and light-source physicists, and federal agency program managers. Sessions were organized to foster interactions between the beam users and facility developers, allowing for information sharing and mutual feedback between the two groups. The workshop findings and recommendations are summarized in this whitepaper.

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“…Fabry-Perot cavities (FPCs) [1] in the pulsed regime have high-power applications in high harmonic generation [2,3], polarized positron generation [4], and x-or γ-ray production by Compton scattering [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. In this article, we focus on the latter application.…”

Section: Introductionmentioning

confidence: 99%

“…In this article, we focus on the latter application. Most Compton sources are made either of a linear accelerator (linac), coupled to an optical circulator [5][6][7] or a single laser pulse; or a storage ring to a FPC [8][9][10][11][12]. However, for operation in small areas, e.g.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a Fabry-Perot cavity operated in burst mode for Compton scattering experiments

Favier

Amoudry

Cassou

et al. 2018

Phys. Rev. Accel. Beams

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Formal and experimental studies of Fabry-Perot cavities operating in burst mode are conducted in the context of Compton scattering. A dedicated optimization procedure for their use in this context is described for the first time, to the best of our knowledge. Provided that the number of bunches in the electron-beam train and their time separation are known, the parameters related to the optical system are chosen to maximize the ratio of the total intracavity laser-beam energy used for collisions to the total input laser beam seeded into the cavity operated in burst mode. A good qualitative agreement is obtained between the model and the experimental data. It is shown by studying the upgrade of an existing machine, STAR. Here a new optical system with increased performance without a large increase in complexity is obtained. This result paves the way towards future designs of high-flux, high-quality, low cost and compact x-ray facilities based on Compton scattering.

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Inverse Compton scattering X-ray source yield optimization with a laser path folding system inserted in a pre-existent RF linac

Cited by 7 publications

References 11 publications

Low power commissioning of an innovative laser beam circulator for inverse Compton scattering γ -ray source

Low power commissioning of an innovative laser beam circulator for inverse Compton scattering γ -ray source

International workshop on next generation gamma-ray source

Optimization of a Fabry-Perot cavity operated in burst mode for Compton scattering experiments

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