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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/616

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Title: Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection
Authors: Phillips, P. J.
Gillespie, W. A.
Steffen, B.
Knabbe, E-A.
Schmidt, B.
Schmüser, P.
Jamison, S. P.
Berden, G.
van der Meer, A. F. G.
MacLeod, Allan M.
Affiliation: University of Abertay Dundee. School of Computing & Engineering Systems
Keywords: Electro-optic
Electron bunch diagnostics
Issue Date: 2007
Publisher: Joint Accelerator Conferences Website
Type: Conference Paper
Refereed: peer-reviewed
Rights: This is the published version of the Conference Paper (c)DIPAC 2007. Available from Joint Accelerated Conferences Website (JACoW) at: http://www.jacow.org/
Citation: Phillips, P.J. et al. 2007. Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection. In: Proceedings of 8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators: DIPAC 2007, Venice May 20-23 2007. [Online] Available from: http://accelconf.web.cern.ch/AccelConf/FEL2008/papers/tupph076.pdf
Abstract: For the high gain operation of a SASE FEL, extremely short electron bunches are essential to generate sufficiently high peak currents. At the superconducting linac of FLASH at DESY, we have installed an electro- optic measurement system to probe the time structure of the electric field of single ~100 fs electron bunches. In this technique, the field induced birefringence in an electro-optic crystal is encoded on a chirped picosecond laser pulse. The longitudinal electric field profile of the electron bunch is then obtained from the encoded optical pulse by a single shot cross correlation with a 35 fs laser pulse using a second harmonic crystal (temporal decoding). An electro-optical signal exhibiting a feature with 118 fs FWHM was observed, and this is close to the limit of resolution due to the material properties of the particular electro-optic crystal used. The measured electro-optic signals are compared to bunch shapes simultaneously measured with a transverse deflecting cavity.
URI: http://hdl.handle.net/10373/616
Appears in Collections:Computing & Engineering Systems Collection

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