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At the Fermilab A0 photoinjector facility, bunch-length measurements of thelaser micropulse and the e-beam micropulse have been done in the past with afast single-sweep module of the Hamamatsu C5680 streak camera with an intrinsicshot-to-shot trigger jitter of 10-20ps. We have upgraded the camera system withthe synchroscan module tuned to 81.25MHz to provide synchronous summingcapability with less than 1.5ps FWHM trigger jitter and a phase-locked delaybox to provide phase stability of ~1ps over 10s of minutes. These steps allowedus to measure both the UV laser pulse train at 263nm and the e-beam via opticaltransition radiation (OTR). Due to the low electron beam energies and OTRsignals, we typically summed over 50 micropulses with 0.25-1nC per micropulse.The phase-locked delay box allowed us to assess chromatic temporal effects andinstigated another upgrade to an all-mirror input optics barrel. In addition,we added a slow sweep horizontal deflection plug-in unit to provide dual-sweepcapability for the streak camera. We report on a series of measurements madeduring the commissioning of these upgrades including bunch-length and phaseeffects using the emittance exchange beamline and simultaneous imaging of a UVdrive laser component, OTR, and the 800nm diagnostics laser.

Synchroscan streak camera imaging at a 15-MeV photoinjector with emittance exchange