Diffraction radiation test at cesrta for non-intercepting micron-scale beam size measurement

L. Bobb, E. Bravin, T. Lefevre, S. Mazzoni, T. Aumeyr, P. Karataev, M. Billing, J. Conway

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

1 Citation (Scopus)


Diffraction radiation (DR) is produced when a relativistic charged particle moves in the vicinity of a medium. The electric field of the charged particle polarises the target atoms which then oscillate, emitting radiation with a very broad spectrum. The spatial-spectral properties of DR are sensitive to a range of electron beam parameters. Furthermore, the energy loss due to DR is so small that the electron beam parameters are unchanged. DR can therefore be used to develop non-invasive diagnostic tools. To achieve the micron-scale resolution required to measure the transverse (vertical) beam size using incoherent DR in CLIC, DR in UV and X-ray spectral-range must be investigated. Experimental validation of such a scheme is ongoing at CesrTA at Cornell University, USA. Here we report on the test using 0.5 mm and 1 mm target apertures on a 2.1 GeV electron beam and 400 nm wavelength.

Original languageEnglish
Title of host publicationIBIC 2013
Subtitle of host publicationProceedings of the 2nd International Beam Instrumentation Conference
PublisherJoint Accelerator Conferences Website (JACoW)
Number of pages4
ISBN (Electronic)9783954501274
Publication statusPublished - 1 Dec 2013
Externally publishedYes
Event2nd International Beam Instrumentation Conference, IBIC 2013 - Oxford, United Kingdom
Duration: 16 Sep 201319 Sep 2013


Conference2nd International Beam Instrumentation Conference, IBIC 2013
CountryUnited Kingdom

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

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