Inverse free electron laser accelerator for advanced light sources

Duris, J.; Musumeci, P.; Li, Renkai

doi:10.1103/physrevstab.15.061301

Cited by 29 publications

(27 citation statements)

References 22 publications

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“…duration with 0.2% r.m.s. energy spread and 410 kA peak current while preserving excellent output beam quality 19 , enabling applications such as compact laser-accelerator based sources of coherent, sub- Figure 3 | Measured electron energy spectra for high-gradient helical IFEL acceleration. (a) Spectrometer images and calibrated spectra with laser-off and laser-on shots for the high-gradient undulator configuration.…”

Section: Discussionmentioning

confidence: 99%

“…1c). The magnetic field amplitude profile along the undulator was chosen by matching the increase in resonant energy with the available laserinduced ponderomotive gradient 19 and tested with IFEL simulations. The results are excellent evidence of our understanding (theoretical and simulational) of the IFEL physics and the stability of the IFEL process.…”

Section: Methodsmentioning

confidence: 99%

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High-quality electron beams from a helical inverse free-electron laser accelerator

Duris¹,

Musumeci²,

Babzien

et al. 2014

Nat Commun

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Compact, table-top sized accelerators are key to improving access to high-quality beams for use in industry, medicine and academic research. Among laser-based accelerating schemes, the inverse free-electron laser (IFEL) enjoys unique advantages. By using an undulator magnetic field in combination with a laser, GeV m À 1 gradients may be sustained over metre-scale distances using laser intensities several orders of magnitude less than those used in laser wake-field accelerators. Here we show for the first time the capture and high-gradient acceleration of monoenergetic electron beams from a helical IFEL. Using a modest intensity (B10 13 Wcm À 2 ) laser pulse and strongly tapered 0.5 m long undulator, we demonstrate 4100 MV m À 1 accelerating gradient, 450 MeV energy gain and excellent output beam quality. Our results pave the way towards compact, tunable GeV IFEL accelerators for applications such as driving soft X-ray free-electron lasers and producing g-rays by inverse Compton scattering.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

High-quality electron beams from a helical inverse free-electron laser accelerator

Duris¹,

Musumeci²,

Babzien

et al. 2014

Nat Commun

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“…Relativistic electrons are coupled to strong laser fields through oscillatory motion as they propagate through a sinusoidal undulator magnetic field. First proposed by Palmer [1] and later investigated for high energy physics applications [2], the IFEL is capable of sustaining GeV/m accelerating gradients over meter-long distances [3] and is a good candidate for compact accelerators for driving light sources. Significant experimental accomplishments using the IFEL interaction include the STELLA2 experiment [4] which demonstrated efficient trapping at Brookhaven National Laboratory (BNL) and the UCLA Neptune IFEL experiment [5] which demonstrated high energy gradients.…”

Section: Introductionmentioning

confidence: 99%

Helical inverse free electron laser accelerator for efficient production of high quality electron beams

Duris¹,

Musumeci²,

Babzien³

et al. 2016

AIP Conference Proceedings

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“…This would make the energy modulation from the first laser comparable to that from the second laser (limited by the available laser energy in our experiment), hindering clear demonstration of net energy shift in the cascaded IFEL setup. Nevertheless, in an ideal cascaded IFEL where a high power laser (>TeraWatt) would be used to significantly boost the beam energy in the second stage (for instance, a 20 TW laser may accelerate an electron beam to 1 GeV in a 1 m long undulator [17]), producing a slightly larger modulation in the first stage to reduce the beam timing jitter for phase locking is necessary and acceptable. For convenience of comparison, the measured energy distributions in Fig.…”

mentioning

confidence: 99%

“…However, the rest of the particles, which are outside the accelerating bucket, fall out of resonance and their energy remains essentially unchanged. Based on this 'selftrapping' mechanism, a single stage IFEL is characterized by limited trapping efficiency and relatively large beam energy spread [10,17].…”

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confidence: 99%

Demonstration of Cascaded Optical Inverse Free-Electron Laser Accelerator

et al. 2013

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We report on a proof-of-principle demonstration of a two-stage cascaded optical inverse freeelectron laser (IFEL) accelerator in which an electron beam is accelerated by a strong laser pulse after being packed into optical micro-bunches by a weaker initial laser pulse. We show experimentally that injection of precisely prepared optical micro-bunches into an IFEL allows net acceleration or deceleration of the beam, depending on the relative phase of the two laser pulses. The experimental results are in excellent agreement with simulation. The demonstrated technique holds great promise to significantly improve the beam quality of IFELs and may have a strong impact on emerging laser accelerators driven by high-power optical lasers. Particle accelerators have played a key role in the development of physics, chemistry, biology, and material science. For instance, in particle physics, elementary particles are accelerated to high energy and then collided with other particles for studying fundamental laws of nature (see, for example [1]). In accelerator-based photon science, the high energy electron beams are used to produce intense x-rays (see, for example [2]) that researchers use to probe molecules, atoms, crystals, and innovative new materials in order to better understand their structure and behavior. Limited by the gradient limits (∼100 MeV/m) in microwave accelerating structures, high-energy beams require massive and costly machines.To reduce the size and cost of these scientific facilities, various laser-based advanced acceleration techniques such as the laser wake-field accelerator (LWFA) [3][4][5] and inverse free-electron laser (IFEL) [6][7][8][9][10] have been proposed and demonstrated to provide much higher accelerating gradients. While the LWFAs driven by high-power optical lasers (e.g. Ti:Sapphire laser with wavelength around 800 nm) have been extensively studied (see, for example [11]), optical IFELs have remained largely undeveloped due in large part to the fact that the synchrotron radiation losses, together with the energy dependent acceleration rate, make it difficult to use IFELs for accelerating beams to TeV energies. However, the recent discovery of the Higgs-like boson at LHC [12,13] in the more accessible 125 GeV range has renewed interest in the development of a compact electron-positron collider based on the IFEL. Furthermore, IFELs may be particularly suited for compact gamma ray sources based on inverse Compton scattering (ICS), because the high-power lasers can be used for both the electron acceleration and the ICS interaction [14][15][16].In an IFEL [6] the electrons interact resonantly with a collinear high-power laser in an undulator, wherein the alternating magnetic field makes the electrons wiggle in the transverse direction. For a planar undulator, sustained energy exchange between the electrons and the laser is achieved when the resonant condition is met, i.e. λ = (1 + K 2 /2)λ u /2nγ 2 , where λ is the laser wavelength, λ u the undulator period, K the dimensionless undulator strengt...

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Inverse free electron laser accelerator for advanced light sources

Cited by 29 publications

References 22 publications

High-quality electron beams from a helical inverse free-electron laser accelerator

High-quality electron beams from a helical inverse free-electron laser accelerator

Helical inverse free electron laser accelerator for efficient production of high quality electron beams

Demonstration of Cascaded Optical Inverse Free-Electron Laser Accelerator

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