Work

Determination of detector frequency ranges for an electron bunch length monitor for AWAKE run 2c

Year: 2026

Type: article

Abstract: The AWAKE 150 MeV electron beamline at CERN is used to provide a witness bunch for plasma wakefield acceleration, with a bunch length shorter than the plasma wavelength to ensure efficient capture and acceleration. To accomplish this, a real-time, non-invasive bunch length monitor is essential. A monitor is being studied to calculate the RMS bunch length by measuring coherent Cherenkov diffraction radiation with 3 Schottky diodes across different frequency ranges. In this paper, we present theoretical bunch length calculations based on the polarization current approach (PCA) to determine the appropriate frequency ranges for the Schottky diodes. Results show that while higher frequencies are more sensitive to variations in bunch length, they are also influenced by the skewness of a Gaussian longitudinal bunch profile.

Source: International Linear Collider

DOI: 10.18429/jacow-ibic2025-wepco08

Authors: McGunigal,Jack, Xia,Guoxing, Davut,Can, Karataev,Pavel, Lefevre,Thibaut, Mazzoni,Stefano

Language: English

Topic: Particle Accelerators and Free-Electron Lasers

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funders: Cockcroft Institute, Science and Technology Facilities Council, Royal Holloway, University of London

Awards: AWAKE Run 2 phase 2, AWAKE-Run 2, The John Adams Institute for Accelerator Science

OpenAlex ID: W7124922646