  Plasma wakefield acceleration is the most promising acceleration technique
for compact and cheap accelerators, thanks to the high accelerating gradients
achievable. Nevertheless, this approach still suffers of shot-to-shot
instabilities, mostly related to experimental parameters fluctuations.
Therefore, the use of single shot diagnostics is needed to properly understand
the acceleration mechanism. In this work, we present two diagnostics to probe
electron beams from laser-plasma interactions, one relying on Electro Optical
Sampling (EOS) for laser-solid matter interactions, the other one based on
Optical Transition Radiation (OTR) for single shot measurements of the
transverse emittance of plasma accelerated electron beams, both developed at
the SPARC_LAB Test Facility.
