First observation of the point spread function of optical transition radiation

Pavel Karataev, Alexander Aryshev, Stewart Boogert, David Howell, Nobuhiro Terunuma, Junji Urakawa

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Abstract

We represent the first experimental observation of the point spread function (PSF) of optical transition radiation (OTR) performed at KEK-Accelerator Test Facility extraction line. We have demonstrated that the PSF vertical polarization component has a central minimum with a two lobe distribution. However, the distribution width varied significantly with wavelength. We assume that we observed a severe effect from spherical or chromatic aberrations which are not taken into account in any existing theoretical model. We believe that the result of this work will encourage theoreticians to continue developing the theory as it is important for various transition radiation applications. Nonuniform distribution of the OTR PSF creates an opportunity for developing a submicrometer transverse beam size monitor.

Original languageEnglish
Article number174801
JournalPhysical Review Letters
Volume107
Issue number17
DOIs
Publication statusPublished - 17 Oct 2011
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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