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

Fibre-Coupled Oscillator-Driven Electro-Optic Spectral Interferometry as a Longitudinal Bunch Profile Monitor

WEPCO40
10 Sept 2025, 16:00
2h
Courtyard, Liverpool Guild of Students

Courtyard, Liverpool Guild of Students

Liverpool Guild of Students, University of Liverpool
Poster Presentation MC05: Longitudinal Diagnostics and Synchronization WEPCO

Speaker

Samuel Norman (University of Manchester)

Description

Electro-optic (EO) diagnostics offer non-destructive methods to resolve the longitudinal charge profile of highly relativistic bunches without the need for complex calibrations or ambiguous phase recovery techniques. The most common technique, EO spectral decoding (EOSD), is favoured for its simplicity, reliability, and straightforward output interpretation, however its resolution is constrained to the geometric mean of the transform-limited and chirped probe laser durations. We have introduced a new technique utilising spectral interferometry (EOSI), which overcomes this limitation by adding a single optical element to an EOSD setup, with successful measurements shown previously on the CLARA accelerator at Daresbury Laboratory. To further explore this technique, we have performed EOSI on the CLEAR accelerator at CERN (160-200 MeV, 15-150 pC and 0.2-1.5 ps RMS) utilising a nJ oscillator and optical fibre-coupled transport. Our results highlight the potential for low power, turn-key operation and flexible integration of EOSI systems for single-shot ultrashort bunch length and arrival time monitoring.

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Authors

Collette Pakuza (European Organization for Nuclear Research) Darren Graham (University of Manchester) David Walsh (Daresbury Laboratory, Cockcroft Institute) Morgan Hibberd (University of Manchester) Samuel Norman (University of Manchester) Thibaut Lefevre (European Organization for Nuclear Research)

Presentation materials

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