Spatial resolution improvement of OTR monitors by off-axis light collection

A. Potylitsyn, L. Sukhikh, G. Kube, A. Novokshonov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The spatial resolution of an OTR monitor, widely used for electron beam profile diagnostics, is determined by the resolution of the optical system and by the Point Spread Function (PSF) representing the single electron image. In the image plane, the PSF has a typical lobe-shape distribution with an inter-peak distance depending on wavelength and lens aperture ratio [1]. For a beam with a transverse rms size smaller than the distance, the reconstruction of the beam profile has several difficulties [2, 3]. We propose to reduce the PSF contribution and to improve the spatial resolution of an OTR monitor simply by rotating the lens optical axis with respect to the specular reflection direction. If the difference between the rotational angle and the lens aperture is much larger than the inverse Lorentz factor, the PSF has a Gaussian-like distribution which matches practically with the Airy distribution. Thus the resolution depends on wavelength and lens aperture. In principle, for lens apertures in the order of 0.1 rad such an approach should allow to measure beam sizes comparable to the wavelength of observation, using a simple deconvolution procedure for the measured image and the PSF.

Original languageEnglish
Title of host publicationProceedings of the 7th International Beam Instrumentation Conference, IBIC 2018
PublisherJoint Accelerator Conferences Website (JACoW)
ISBN (Electronic)9783954502011
DOIs
Publication statusPublished - Nov 2018
Event7th International Beam Instrumentation Conference, IBIC 2018 - Shanghai, China
Duration: 9 Sep 201813 Sep 2018

Publication series

NameProceedings of the 7th International Beam Instrumentation Conference, IBIC 2018

Conference

Conference7th International Beam Instrumentation Conference, IBIC 2018
CountryChina
CityShanghai
Period9.9.1813.9.18

Fingerprint

Optical transfer function
point spread functions
monitors
Lenses
spatial resolution
lenses
apertures
Wavelength
wavelengths
specular reflection
Deconvolution
profiles
normal density functions
Optical systems
lobes
Electron beams
electron beams
Electrons
electrons

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Potylitsyn, A., Sukhikh, L., Kube, G., & Novokshonov, A. (2018). Spatial resolution improvement of OTR monitors by off-axis light collection. In Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018 (Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018). Joint Accelerator Conferences Website (JACoW). https://doi.org/10.18429/JACoW-IBIC2018-wepb11

Spatial resolution improvement of OTR monitors by off-axis light collection. / Potylitsyn, A.; Sukhikh, L.; Kube, G.; Novokshonov, A.

Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018. Joint Accelerator Conferences Website (JACoW), 2018. (Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Potylitsyn, A, Sukhikh, L, Kube, G & Novokshonov, A 2018, Spatial resolution improvement of OTR monitors by off-axis light collection. in Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018. Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018, Joint Accelerator Conferences Website (JACoW), 7th International Beam Instrumentation Conference, IBIC 2018, Shanghai, China, 9.9.18. https://doi.org/10.18429/JACoW-IBIC2018-wepb11
Potylitsyn A, Sukhikh L, Kube G, Novokshonov A. Spatial resolution improvement of OTR monitors by off-axis light collection. In Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018. Joint Accelerator Conferences Website (JACoW). 2018. (Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018). https://doi.org/10.18429/JACoW-IBIC2018-wepb11
Potylitsyn, A. ; Sukhikh, L. ; Kube, G. ; Novokshonov, A. / Spatial resolution improvement of OTR monitors by off-axis light collection. Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018. Joint Accelerator Conferences Website (JACoW), 2018. (Proceedings of the 7th International Beam Instrumentation Conference, IBIC 2018).
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