Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection

P.J. Phillips, W. A. Gillespie, B. Steffen, E.-A. Knabbe, B. Schmidt, P. Schmüser, S.P. Jamison, G. Berden, A.F.G. Van Der Meer, A.M. MacLeod

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

    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.
    Original languageEnglish
    Title of host publication8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators
    Subtitle of host publicationDIPAC 2007
    Pages221-223
    Number of pages3
    Publication statusPublished - 2007
    Event8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2007 - Venice, Italy
    Duration: 20 May 200723 May 2007

    Conference

    Conference8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators, DIPAC 2007
    CountryItaly
    CityVenice
    Period20/05/0723/05/07

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    Cite this

    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, A. M. (2007). Single shot longitudinal bunch profile measurements by temporally resolved electro-optical detection. In 8th European Workshop on Beam Diagnostics and Instrumentation for Particle Accelerators : DIPAC 2007 (pp. 221-223)