Electron Linac design to drive bright Compton back-scattering gamma-ray sources

Bacci, A.; Alesini, D.; Antici, P.; Bellaveglia, M.; Boni, R.; Chiadroni, E.; Cianchi, A.; Curatolo, C.; Pirro, G. Di; Esposito, A.; Ferrario, M.; Gallo, A.; Gatti, G.; Ghigo, A.; Migliorati, M.; Mostacci, A.; Palumbo, L.; Petrillo, V.; Pompili, R.; Ronsivalle, C.; Rossi, A. R.; Serafini, L.; Spataro, B.; Tomassini, P.; Vaccarezza, C.

doi:10.1063/1.4805071

Cited by 70 publications

(49 citation statements)

References 28 publications

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“…As extensively reported elsewhere [1][2][3][4][5] the phase space density of the electron beam and of the laser beam at the collision point are key issues for achieving high fluxes of gamma rays with very small bandwidths, as those typically requested by nuclear physics experiments and applications. In this article, we concentrate on the optical design of the interaction point (IP) of a Compton γ-ray machine which has been proposed for the European Extreme Light Infrastructure "Nuclear Pillar," i.e., the Gamma Beam System (ELI-NP-GBS) [1,3,4,6] project.…”

Section: Introductionmentioning

confidence: 99%

Design and optimization of a highly efficient optical multipass system forγ-ray beam production from electron laser beam Compton scattering

Dupraz

Cassou

Delerue

et al. 2014

Phys. Rev. ST Accel. Beams

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A new kind of nonresonant optical recirculator, dedicated to the production of γ rays by means of Compton backscattering, is described. This novel instrument, inspired by optical multipass systems, has its design focused on high flux and very small spectral bandwidth of the γ-ray beam. It has been developed to fulfill the project specifications of the European Extreme Light Infrastructure "Nuclear Pillar," i.e., the Gamma Beam System. Our system allows a single high power laser pulse to recirculate 32 times synchronized on the radio frequency driving accelerating cavities for the electron beam. Namely, the polarization of the laser beam and crossing angle between laser and electrons are preserved all along the 32 passes. Moreover, optical aberrations are kept at a negligible level. The general tools developed for designing, optimizing, and aligning the system are described. A detailed simulation demonstrates the high efficiency of the device.

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Section: Introductionmentioning

confidence: 99%

Design and optimization of a highly efficient optical multipass system forγ-ray beam production from electron laser beam Compton scattering

Dupraz

Cassou

Delerue

et al. 2014

Phys. Rev. ST Accel. Beams

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“…The Linac produces high peak brightness in the single bunch, as well as a multi-bunch beam with effective high repetition rate, which increases the average current [8]. It will run at the maximum radiofrequency (RF) repetition rate achievable (100 Hz), injecting from the photo-injectors into the booster Linac trains of bunches which are filling the available RF pulse time duration, typically, 32 bunches separated by 16 ns over a 512 ns flat RF pulse.…”

Section: The Eli-np Projectmentioning

confidence: 99%

Towards experiments at the new ELI-NP facility

Balabanski

Cǎta-Danil

Filipescu

et al. 2014

EPJ Web of Conferences

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Abstract. The Extreme Light Infrastructure (ELI) Pan-European initiative represents a major step forward in quest for extreme electromagnetic fields. The Extreme Light Infrastructure -Nuclear Physics (ELI-NP) laboratory is one of the three pillars of the ELI project, that aims to use such extreme electromagnetic fields for nuclear physics and quantum electrodynamics research. At ELI-NP two ten petawatt high-power laser systems together with a very brilliant narrow-width γ beam are the main research tools. Here the current status of the project and the experimental program related to nuclear research, which is under preparation at ELI-NP, are presented. The ELI-NP projectELI-NP [1] is one of the three laboratories under construction, related the ELI project [2], the other two being laser-driven secondary beams in Prague, the Czech Republic [3] and attosecond pulsed lasers in Szeged, Hungary [4]. In 2012 the 293-million-euro ELI-NP project was approved by the European Commission. ELI-NP will host two ultra high-power 10 PW lasers and a gamma beam system (GBS) which will deliver laser and γ-ray beams with parameters beyond those available at the present-stateof-the-art machines. The main laboratory building covers an area of more than 12000 m 2 . Its lay-out is displayed in Fig 1. The high-power laser system (HPLS) and the gamma beam system (GBS) are placed in the laboratory building, adjacent to the corresponding experimental areas. They will be mounted on an anti-vibration slab, damping vibrations to frequencies ≤ 10 Hz with amplitudes down to ±1 μm.The HPLS will have six output lines -two at 10 PW with a frequency of ≥ 1/60 Hz, two at 1 PW with a frequency of ≥ 1 Hz and two at 100 TW with a frequency of ≥ 10 Hz. Each output will have its optical pulse compressor. The duration of the pulses from each of the six outputs of the HPLS shall be tunable from the best compression level to at least 5 ps pulse duration, with both positive and negative chirp. The HPLS outputs will be synchronized with accuracy below 200 fs [5]. The laser system will deliver pulses synchronously with the GBS electron and γ bunches.The GBS is designed and constructed by the European consortium EuroGammaS, led by the Italian INFN LNF, including research and industrial partners from eight European countries. It will produce highly polarized (> 95%) tunable γ beams of spectral density of 10 4 photons/s/eV in the range from 200 keV to 19.5 MeV with a bandwidth of > 0.3% [6,7]. The γ beams will be produced through laser Compton backscattering (LCB) off an accelerated electron beam delivered by a linear a

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“…A neutron detection system based on the moderation of neutrons followed by conversion reactions of neutrons inside 3 He counters is proposed at ELI-NP. The system will be a flat efficiency 4π neutron detector consisting 31 3 He counters placed on three concentric rings inside a polyethylene moderator.…”

Section: Experiments With Gamma Beams Above Neutron Thresholdmentioning

confidence: 99%

“…The system will be a flat efficiency 4π neutron detector consisting 31 3 He counters placed on three concentric rings inside a polyethylene moderator. The flat efficiency is essential for neutron multiplicity sorting technique proposed to be used at ELI-NP and already in test at the NewSUBARU LCS [17] gamma beam system.…”

Section: Experiments With Gamma Beams Above Neutron Thresholdmentioning

confidence: 99%

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Nuclear physics with advanced brilliant gamma beams at ELI–NP

Filipescu

Gheorghe

et al. 2016

EPJ Web of Conferences

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Abstract. The Extreme Light Infrastructure -Nuclear Physics facility is dedicated to nuclear physics studies with the use of extreme electromagnetic radiation. One of the main research system to be installed and operated in the facility is an outstanding high brilliance gamma beam system. The Gamma Beam System of ELI-NP will produce intense, quasi-monochromatic gamma beams via inverse Compton scattering of short laser pulses on relativistic electron beam pulses. The gamma beams available at ELI-NP will allow for the performance of photo-nuclear reactions aiming to reveal the intimate structure of the atomic nucleus. Nuclear Resonance Fluorescence, photo-fission, photo-disintegration reactions above the particle threshold will be used to study the dipole response of nuclei, the structure of the Pygmy resonances, nuclear processes relevant for astrophysics, production and study of exotic neutron-rich nuclei.

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Electron Linac design to drive bright Compton back-scattering gamma-ray sources

Cited by 70 publications

References 28 publications

Design and optimization of a highly efficient optical multipass system forγ-ray beam production from electron laser beam Compton scattering

Design and optimization of a highly efficient optical multipass system forγ-ray beam production from electron laser beam Compton scattering

Towards experiments at the new ELI-NP facility

Nuclear physics with advanced brilliant gamma beams at ELI–NP

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