An Electron Beam Profile Instrument Based on FBGs

Sensors

Dan Sporea¹  Andrei Stăncălie¹  Nicu Becherescu³  Martin Becker² 

[1] National Institute Laser, Plasma and Radiation Physics, 409 Atomiştilor St., Măgurele, RO-077125, Romania; E-Mail:;Leibniz Institute of Photonic Technology, Albert Einstein Str. 9, Jena 07745, Germany; E-Mails:;Apel Laser, 15 Vintila Mihăilescu St., Bucharest, RO-060394, Romania; E-Mail:

关键词: fiber Bragg grating;    electron beam;    on-line beam profilometry;    radiation-hardened optical fiber;   

DOI  :  10.3390/s140915786

来源: mdpi

【 摘 要 】

Along with the dose rate and the total irradiation dose measurements, the knowledge of the beam localization and the beam profile/energy distribution in the beam are parameters of interest for charged particle accelerator installations when they are used in scientific investigations, industrial applications or medical treatments. The transverse profile of the beam, its position, its centroid location, and its focus or flatness depend on the instrument operating conditions or on the beam exit setup. Proof-of-concept of a new type of charged particle beam diagnostics based on fiber Bragg gratings (FBGs) was demonstrated. Its operating principle relies on the measurement of the peak wavelength changes for an array of FBG sensors as function of the temperature following the exposure to an electron beam. Periodically, the sensor irradiation is stopped and the FBG are force cooled to a reference temperature with which the temperature influencing each sensor during beam exposure is compared. Commercially available FBGs, and FBGs written in radiation resistant optical fibers, were tested under electron beam irradiation in order to study their possible use in this application.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.