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First difference mode interferometer demonstration for a high-bandwidth Electro-Optic Beam Position Monitor.

A Arteche1, S M Gibson2, A Schloegelhofer3

  • 1Physics Department, John Adams Institute for Accelerator Science at Royal Holloway, University of London, Egham Hill, Egham, TW20 0EX, UK. alberto.arteche@rhul.ac.uk.

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Summary
This summary is machine-generated.

This study demonstrates a new Electro-Optic Beam Position Monitor (EO-BPM) using differential-field detection. This innovative device achieves sub-millimetric resolution and ultrafast response for high-energy particle beams.

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Area of Science:

  • Particle accelerator technology
  • High-energy physics instrumentation
  • Optical sensing

Background:

  • Development of advanced beam diagnostics is crucial for High-Luminosity Large Hadron Collider (HL-LHC) upgrades.
  • Existing beam position monitors face challenges with high bandwidth and radiation environments.
  • Novel detection schemes are needed for precise monitoring of ultra-relativistic particle bunches.

Purpose of the Study:

  • To experimentally demonstrate the differential-field detection mode (Δ) for a novel interferometric Electro-Optic Beam Position Monitor (EO-BPM).
  • To validate a new field-focusing pickup design for high-bandwidth, single-pass detection of HL-LHC proton bunches.
  • To assess the transverse position and time-resolution capabilities of the EO-BPM system.

Main Methods:

  • Utilized a fibre-coupled Mach-Zehnder interferometry scheme for detection.
  • Engineered a novel field-focusing pickup design for enhanced signal acquisition.
  • Tested the system at the HiRadMat and CLEAR beamlines for transverse position and time-resolution measurements, respectively.
  • Evaluated signal stability under high levels of back-scattering radiation.

Main Results:

  • Achieved sub-millimetric transverse position resolution.
  • Demonstrated an ultrafast time response below the HL-LHC goal.
  • Confirmed high-bandwidth detection capabilities for SPS-like proton bunch parameters.
  • Showcased the system's robustness and suitability for high-radiation environments due to its optical nature.

Conclusions:

  • The differential-field detection mode is a viable and effective component for advanced EO-BPM development.
  • The novel EO-BPM design offers high precision and speed necessary for future collider experiments.
  • The optical nature of the EO-BPM ensures reliable performance in challenging radiation conditions.