JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - UNPB AU - Maxson, J.M. ED - Biedron, Sandra ED - Simakov, Evgenya ED - Milton, Stephen ED - Anisimov, Petr M. ED - Schaa, Volker R.W. TI - Ultrafast Electron Diffraction at Cornell Using Low Emittance Photocathodes J2 - Proc. of NAPAC2022, Albuquerque, NM, USA, 07-12 August 2022 CY - Albuquerque, NM, USA T2 - International Particle Accelerator Conference T3 - 5 LA - english AB - A new system for ultrafast electron diffraction has been commissioned at Cornell which uses alkali antimonides photocathode in a 200 keV DC gun. Utilizing a tunable wavelength ultrafast laser source, it is the first photogun to use near-photoemission-threshold drive laser wavelengths in operation, which provides for very low emittance initial conditions. Emittance is preserved in the space charge regime via emittance compensation in conjunction with multipole correction out to sextupole order. The end result is beam quality that provides the ability to study much smaller material samples (down to a few microns across) or to resolve fine features in diffraction space; these are demonstrated via proof of principle experiments. PB - JACoW Publishing CP - Geneva, Switzerland ER -