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An electron beam profile instrument based on FBGs.

Dan Sporea1, Andrei Stăncălie2, Nicu Becherescu3

  • 1National Institute Laser, Plasma and Radiation Physics, 409 Atomiştilor St., Măgurele, RO-077125, Romania. dan.sporea@inflpr.ro.

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Summary

This study demonstrates a novel diagnostic method using fiber Bragg gratings (FBGs) to measure charged particle beam properties. FBGs detect temperature changes induced by electron beams, enabling precise beam characterization for various applications.

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Area of Science:

  • Physics
  • Materials Science
  • Engineering

Background:

  • Accurate characterization of charged particle beams is crucial for scientific, industrial, and medical applications.
  • Key parameters include beam localization, profile, and energy distribution, which are influenced by operational conditions.
  • Existing diagnostic methods may have limitations in precision or applicability.

Purpose of the Study:

  • To demonstrate the proof-of-concept for a new charged particle beam diagnostic system.
  • To utilize fiber Bragg gratings (FBGs) as sensors for measuring beam-induced temperature changes.
  • To evaluate the feasibility of FBGs for real-time beam monitoring.

Main Methods:

  • An array of FBG sensors was exposed to an electron beam.
  • Peak wavelength shifts in FBGs were measured, correlating with temperature changes.
  • Sensors were periodically cooled to a reference temperature for comparative analysis.
  • Both commercial and radiation-resistant FBGs were tested under irradiation.

Main Results:

  • The study successfully demonstrated the principle of FBG-based beam diagnostics.
  • FBG wavelength shifts accurately reflected temperature variations caused by electron beam exposure.
  • The performance of different FBG types under irradiation was assessed.

Conclusions:

  • Fiber Bragg gratings offer a viable technology for charged particle beam diagnostics.
  • This method allows for precise measurement of beam characteristics through temperature monitoring.
  • FBGs show potential for use in diverse accelerator applications, including scientific, industrial, and medical fields.