Precision laser diagnostics for LUXE

Strong field QED is an active research frontier. The investigation of fundamental phenomena such as pair creation, photon-photon and photon-electron interactions in the nonlinear regime are a formidable challenge -- both experimentally theoretically. Several experiments around world being planned or preparation to probe this strong regime. LUXE (Laser Und XFEL Experiment) experimental platform which envisages collision high quality 16.5 GeV electron beam from European accelerator with 100 TW class power laser. One unique features measure key observables rates ($e^+e^-$) unprecedented accuracy characterization beams together ample statistics. state-of-art detector technologies for energy particle photon detection enable percent level precision. lasers offer laser beams, however, residual shot-to-shot fluctuations coupled large nonlinearity processes under form particular challenge. An uncertainty 5 on absolute intensity already leads very ( about 40 percent) rate. Hence it becomes essential control parameters precisely. To mitigate issue full suite diagnostics currently developed at JETI40 Jena aim tagging shot less than 1 percent. In presentation, details suit single all will be presented. Moreover, results ongoing campaign properly relay image without significant distortion post-diagnosis discussed.