Beam matching with space charge in energy recovery linacs

Khan, Aamna; Hug, Florian; Stoll, Christian

doi:10.1016/j.nima.2019.162822

Cited by 5 publications

(1 citation statement)

References 19 publications

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“…However, during deceleration, the changes in the longitudinal phase space from CSR will add to the decelerating RF curvature which together with the adiabatic growth of the energy spread during deceleration will result in a significant energy spread at the dump if not accounted for. LSC can be introduced in our considerations by tracking the bunch through the low energy sections [24] and taking the pre-accelerated bunch as the start of our analysis and tracking the last decelerating pass towards the dump. With these caveats, we have demonstrated a methodology for designing multi-pass ERLs for a wide range of applications.…”

Section: Discussionmentioning

confidence: 99%

Construction of Self-Consistent Longitudinal Matches in Multi-Pass Energy Recovery Linacs

Segurana,

Bailey,

Williams

2021

Preprint

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Any proposal for an accelerator facility based upon a multipass Energy Recovery Linac (ERL) must possess a self-consistent match in longitudinal phase space, not just transverse phase space. We therefore present a semi-analytic method to determine self-consistent longitudinal matches in any multipass ERL. We apply this method in collider scenarios (embodying an energy spread minimising match) and FEL scenarios (embodying a compressive match), and discuss the consequences of each. As an example of the utility of the method, we prove that the choice of common or separate recirculation transport determines the feasibility of longitudinal matches in cases where disruption, such as synchrotron radiation loss, exists. We show that any high energy multipass ERL collider based upon common recirculation transport will require special care to produce a self-consistent longitudinal match, but that one based upon separate transport is readily available. Furthermore we show that any high energy multipass ERL FEL driver based upon common recirculation transport requires a larger resultant rf beam load than the one based on separate transport, favouring the separate transport designs.

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Section: Discussionmentioning

confidence: 99%