The application of encoder–decoder neural networks in high accuracy and efficiency slit-scan emittance measurements

A superconducting radio-frequency (SRF) photo injector is in operation at the electron linac for beams with high brilliance and low emittance (ELBE) radiation center generates continuous wave (CW) average current brightness user since 2018. The speed of measurement SRF gun beamline can be increased by improving slit-scan system, thus time one phase space mapping shortened from about 15 minutes to 90 seconds. parallel algorithm machine learning have been used reduce beamlet image noise. In order estimate uncertainty calculation normalized emittance, we analyze main error contributions such as slit position uncertainty, noise, charge effects energy inaccuracy.