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TY - CONF AU - Jamison, S.P. AU - Cliffe, M.J. AU - Graham, D.M. AU - Lake, D. AU - Snedden, E.W. AU - Walsh, D.A. ED - Schaa, Volker RW TI - A THz Driven Transverse Deflector for Femtosecond Longitudinal Profile Diagnostics J2 - Proc. of IBIC2016, Barcelona, Spain, Sept. 13-18, 2016 C1 - Barcelona, Spain T2 - International Beam Instrumentation Conference T3 - 5 LA - english AB - Progress towards a THz-driven transverse deflecting longitudinal profile diagnostic is presented. The deflector is driven with sub-picosecond quasi-single cycle THz fields generated by non-linear optical rectification. To utilize the large deflection field strength of the source for longitudinal diagnostics it is necessary to maintain the single-cycle field profile of the THz pulse throughout the interaction with the relativistic beam. Our scheme allows for the octave spanning bandwidth of the single-cycle pulses to propagate without dispersion at subluminal velocities matched to co-propagating relativistic electrons, by passing the pulse distortion and group-carrier walk-off limitations of dielectric loaded waveguide structure. The phase velocity is readily tuneable, both above and below the speed of light in a vacuum, and single-cycle propagation of deflecting fields at velocities down to 0.77c have been demonstrated. PB - JACoW CP - Geneva, Switzerland SP - 749 EP - 752 KW - electron KW - laser KW - vacuum KW - diagnostics KW - acceleration DA - 2017/02 PY - 2017 SN - 978-3-95450-177-9 DO - 10.18429/JACoW-IBIC2016-WEPG48 UR - http://jacow.org/ibic2016/papers/wepg48.pdf ER -