2013
DOI: 10.1103/physrevstab.16.050701
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Maximum brightness of linac-driven electron beams in the presence of collective effects

Abstract: Linear accelerators capable of delivering high brightness electron beams are essential components of a number of research tools, such as free electron lasers (FELs) and elementary particle colliders. In these facilities the charge density is high enough to drive undesirable collective effects (wakefields) that may increase the beam emittance relative to the injection level, eventually degrading the nominal brightness. We formulate a limit on the final electron beam brightness, imposed by the interplay of geome… Show more

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Cited by 10 publications
(14 citation statements)
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“…This assumption roughly fits experimental data collected both at LCLS and at FERMI, for Q in the range 0.02-1.0 nC [33]. The normalized transverse emittance is here intended to be slice and its value is assumed to be 80% of the projected value listed in [33]. In general, σ E;IBS turns out to be quite insensitive to Q if compared to its dependence on s, γ andβ because, as shown in Eq.…”
Section: A Analytical Estimatesupporting
confidence: 52%
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“…This assumption roughly fits experimental data collected both at LCLS and at FERMI, for Q in the range 0.02-1.0 nC [33]. The normalized transverse emittance is here intended to be slice and its value is assumed to be 80% of the projected value listed in [33]. In general, σ E;IBS turns out to be quite insensitive to Q if compared to its dependence on s, γ andβ because, as shown in Eq.…”
Section: A Analytical Estimatesupporting
confidence: 52%
“…In other words we assume the following scaling: ε n ½μm ≈ Q½nC 1=3 and σ z ½mm ≈ 1.2 × Q½nC 1=3 , so that Q=ðσ z ε 2 n Þ ¼ const. This assumption roughly fits experimental data collected both at LCLS and at FERMI, for Q in the range 0.02-1.0 nC [33]. The normalized transverse emittance is here intended to be slice and its value is assumed to be 80% of the projected value listed in [33].…”
Section: A Analytical Estimatementioning
confidence: 58%
“…One could therefore argue that only slice electron beam quality is of interest, with each slice being as long as the FEL slippage length. In practice, however, other considerations related to the electron beam control and optimization of the FEL performance justify an optimization of both slice and projected beam emittances [49,58,59]. In the following, we extend the 3-D gain length theory to include the influence of the projected transverse emittance.…”
Section: Considerations For Fel Operationmentioning
confidence: 99%
“…CSR effects dominate in LCLS, instead, due to much stronger compression. Pictures published in [58]. Copyright (2014) by The American Physical Society.…”
Section: Optimization Studymentioning
confidence: 99%
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