7–11 Sept 2025
Teaching Hub 502
Europe/London timezone

End to end simulations of a novel optical fibre monitoring system for energy recovery LINACs

MOPCO01
8 Sept 2025, 16:00
2h
Teaching Hub 502

Teaching Hub 502

The University of Liverpool 160 Mount Pleasant L3 5TR Liverpool
Poster Presentation MC02: Beam Loss Monitors and Machine Protection MOP

Speaker

Angus Jones (Cockcroft Institute, University of Liverpool)

Description

Energy recovery LINACs (ERLs) are a type of novel accelerator, which recycle energy from old beams to new beams to increase machine energy efficiency. However, this can heighten beam instabilities, which limits the maximum beam current and increases beam losses. An optical fibre beam loss monitor (OBLM) can provide rapid and reliable beam loss monitoring, which is important for mitigating these instabilities. It obtains the beam loss location via time-of-flight analysis of Cherenkov radiation (CR) produced in optical fibres by relativistic particle showers from beam loss events. Operational demonstration of the OBLM system has previously been shown at several non-ERL facilities, but the multi-energy, fast-repeating beams of ERLs present a unique challenge. Successful interpretation of ERL beam loss signals involves distinguishing losses from beams of different energies, which can be investigated through end-to-end Monte Carlo simulations of the radiation environment and its interaction with the OBLM system. This contribution presents Geant4 simulations of the OBLM response to sample sources of beam loss for beam energies of 7-500 MeV and bunch populations of 1-10M electrons.

Funding Agency

This work is supported by the Enhancing ERL development in the UK Grant (STFC
ST/X000540/1) and the Cockcroft Institute Core Grant (STFC ST/V001612/1).

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Authors

Angus Jones (Cockcroft Institute, University of Liverpool) Joseph Wolfenden (University of Liverpool, Cockcroft Institute) Stewart Boogert (Cockcroft Institute, University of Manchester) Carsten Welsch (University of Liverpool, Cockcroft Institute)

Presentation materials

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