High quality single shot diffraction patterns using ultrashort megaelectron volt electron beams from a radio frequency photoinjector

P Musumeci; J T Moody; C M Scoby; M S Gutierrez; H A Bender; N S Wilcox

doi:10.1063/1.3292683

High quality single shot diffraction patterns using ultrashort megaelectron volt electron beams from a radio frequency photoinjector

Rev Sci Instrum. 2010 Jan;81(1):013306. doi: 10.1063/1.3292683.

Authors

P Musumeci¹, J T Moody, C M Scoby, M S Gutierrez, H A Bender, N S Wilcox

Affiliation

¹ Department of Physics and Astronomy, UCLA, Los Angeles, California 90095, USA.

PMID: 20113092
DOI: 10.1063/1.3292683

Abstract

Single shot diffraction patterns using a 250-fs-long electron beam have been obtained at the UCLA Pegasus laboratory. High quality images with spatial resolution sufficient to distinguish closely spaced peaks in the Debye-Scherrer ring pattern have been recorded by scattering the 1.6 pC 3.5 MeV electron beam generated in the rf photoinjector off a 100-nm-thick Au foil. Dark current and high emittance particles are removed from the beam before sending it onto the diffraction target using a 1 mm diameter collimating hole. These results open the door to the study of irreversible phase transformations by single shot MeV electron diffraction.