Identification of competing ionization processes in the generation of ultrafast electron bunches from cold-atom electron sources

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dc.contributor.authorSpeirs, R.
dc.contributor.authorMcCulloch, A.
dc.contributor.authorSparkes, B.
dc.contributor.authorScholten, R.
dc.date.issued2017
dc.descriptionPublished 17 May 2017
dc.description.abstractWe make direct measurements of the duration of ultrafast cold-electron bunches produced by photoionization of laser-cooled atoms. We show that the bunch duration can vary by up to six orders of magnitude for relatively small changes in laser wavelength that enhance or inhibit specific photoexcitation pathways and below-threshold tunneling. By selecting a two-color multiphoton excitation process, bunches with durations as low as the measurement resolution limit of 130 ps are measured using a streak technique. Verification that ultrafast cold-electron bunches can be generated by photoionization of cold atoms is an important step towards their application in high-brightness ultrafast electron diffraction and injectors for particle accelerators.
dc.description.statementofresponsibilityRory W. Speirs, Andrew J. McCulloch, Ben M. Sparkes, and Robert E. Scholten
dc.identifier.citationPhysical Review A (atomic, molecular, and optical physics and quantum information), 2017; 95(5):053408-1-053408-6
dc.identifier.doi10.1103/PhysRevA.95.053408
dc.identifier.issn2469-9926
dc.identifier.issn2469-9934
dc.identifier.orcidSparkes, B. [0000-0002-9370-2006]
dc.identifier.urihttp://hdl.handle.net/2440/107055
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.granthttp://purl.org/au-research/grants/arc/DP140102102
dc.rights©2017 American Physical Society
dc.source.urihttps://doi.org/10.1103/physreva.95.053408
dc.titleIdentification of competing ionization processes in the generation of ultrafast electron bunches from cold-atom electron sources
dc.typeJournal article
pubs.publication-statusPublished

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