Electron beam emittance growth in thin foils: A betatron function analysis

Reid, Max B.

doi:10.1063/1.349761

Cited by 15 publications

(10 citation statements)

References 4 publications

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“…5(b). The model was based on calculating the electron beam Twiss parameters (α T , β T , γ T ) from the appropriate transport matrices [40]. We followed Ref.…”

mentioning

confidence: 99%

Active Plasma Lensing for Relativistic Laser-Plasma-Accelerated Electron Beams

et al. 2015

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Compact, tunable, radially symmetric focusing of electrons is critical to laser-plasma accelerator (LPA) applications. Experiments are presented demonstrating the use of a discharge-capillary active plasma lens to focus 100-MeV-level LPA beams. The lens can provide tunable field gradients in excess of 3000 T/m, enabling cm-scale focal lengths for GeV-level beam energies and allowing LPA-based electron beams and light sources to maintain their compact footprint. For a range of lens strengths, excellent agreement with simulation was obtained.

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“…5(b). The model was based on calculating the electron beam Twiss parameters (α T , β T , γ T ) from the appropriate transport matrices [40]. We followed Ref.…”

mentioning

confidence: 99%

Active Plasma Lensing for Relativistic Laser-Plasma-Accelerated Electron Beams

et al. 2015

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“…Tungsten is chosen to produce the maximum scatter for its thickness, having a radiation length of 3.5 mm [22]. 25 MeV electrons hitting the mask are scattered by 160 mrad rms [23] producing a 5 cm spot at the downstream screen, much larger than the $6 mm projection of the slits. Thus, the scattered signal is both weak compared to the beamlets, and contributes a small nearly uniform background to the emittance image.…”

Section: Introductionmentioning

confidence: 99%

Emittance and divergence of laser wakefield accelerated electrons

Sears

Buck

Schmid

et al. 2010

Phys. Rev. ST Accel. Beams

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We apply the pepper-pot method to measure in a single shot the transverse emittance of quasimonoenergetic electrons with 20 MeV energy produced by laser wakefield acceleration (LWFA). The large divergence of LWFA beams (> 1 mrad typical) compared to conventional rf accelerator beams places additional restrictions on the pepper-pot design. The LWFA beam is found to have a normalized rms transverse emittance of N ¼ 2:3 mm mrad, with a shot-to-shot fluctuation of 17%. This emittance is comparable to state-of-the-art injectors for conventional linear accelerators. In addition, we examine the beam divergence of LWFA electrons. Simulations and theory indicate that an adiabatic reduction in the beam divergence occurs when the transition region of the downstream plasma density profile is comparable to the betatron period of the electron beam in the plasma accelerator.

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“…small angle scattering) on e-beams propagating through the plastic tape is estimated. The rms divergence of an e-beam propagating through a thin solid material is calculated using [92], θ rms = 17.5 γmc 2 z X 0 9 8 1 + 1 9 log 10 z X 0 , (5.8) where z is the propagation distance and X 0 = 28.5 cm is the radiation length of a polyester film. When a ∼ 511 MeV (γ = 1,000) e-beam propagates through a tape of 35 µm thick (25 µm thick tape placed at 45 ≡ ), the scattering angle is θ rms 247 µmrad.…”

Section: Electron Beam Interaction With Plasma Mirrormentioning

confidence: 99%

Investigation of Staged Laser-Plasma Acceleration

Shiraishi¹

2015

Springer Theses

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The series ''Springer Theses'' brings together a selection of the very best Ph.D. theses from around the world and across the physical sciences. Nominated and endorsed by two recognized specialists, each published volume has been selected for its scientific excellence and the high impact of its contents for the pertinent field of research. For greater accessibility to non-specialists, the published versions include an extended introduction, as well as a foreword by the student's supervisor explaining the special relevance of the work for the field. As a whole, the series will provide a valuable resource both for newcomers to the research fields described, and for other scientists seeking detailed background information on special questions. Finally, it provides an accredited documentation of the valuable contributions made by today's younger generation of scientists.Theses are accepted into the series by invited nomination only and must fulfill all of the following criteria • They must be written in good English.• The topic should fall within the confines of Chemistry, Physics, Earth Sciences, Engineering and related interdisciplinary fields such as Materials, Nanoscience, Chemical Engineering,

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Electron beam emittance growth in thin foils: A betatron function analysis

Cited by 15 publications

References 4 publications

Active Plasma Lensing for Relativistic Laser-Plasma-Accelerated Electron Beams

Active Plasma Lensing for Relativistic Laser-Plasma-Accelerated Electron Beams

Emittance and divergence of laser wakefield accelerated electrons

Investigation of Staged Laser-Plasma Acceleration

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