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Results from the Optical Replica Experiment in FLASH
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics and Astronomy. Hoegenergifysik. (Acceleratorfysik)
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics and Astronomy. Hoegenergifysik. (Acceleratorfysik)
2008 (English)In: Proceedings of the European particle Accelerator Conference EPAC08, 2008Conference paper, Published paper (Other scientific)
Abstract [en]

We present experimental results from the optical replica synthesizer, a novel device to diagnose sub-ps electron bunches by creating a coherent optical pulse in the infrared that has the envelope of the electron bunch and analyzing the latter by frequency resolved optical gating methods. Such a device was recently installed in FLASH at DESY. During a first experiment period the spatial and temporal overlap of a several ps long electron bunch and a 200\,fs laser pulse were achieved within an undulator. Coherent transition

radiation due to the induced micro-bunching was observed on a silver-coated silicon screen and varying the timing between electrons and laser pulse produced two-dimensional images of the slices as a function of the longitudinal position within the electron bunch. During a second experiment period the strongly compressed electron bunch is modulated by the laser pulse and replica pulses that are emitted from a second undulator are observed by frequency resolved optical gating methods.

Place, publisher, year, edition, pages
2008.
Identifiers
URN: urn:nbn:se:uu:diva-17493OAI: oai:DiVA.org:uu-17493DiVA: diva2:45264
Available from: 2008-06-25 Created: 2008-06-25

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