The DETEM team finds time zero!
Omid, Allan, Ryan, Eric and Frank were able to find the exact temporal overlap between laser and electron pulses. The difference image movie shows how a short (~200 fs) laser pulse generates a plasma at the edge of a copper grid, which deflects the electron pulse (shown as a bright/dark fringes). This is the final major milestone in the DETEM development. Almost ready to do real experiments!