Plasmonic photocathode

rookhaven photocathode rf gun

The Brookhaven Accelerator Test Facility (ATF) uses a photocathode rf gun to provide a high-brightness electron beam intended for FEL and laser acceleration experiments. The rf gun consists of 1-,' cells driven at 2856 MHz in 7r-mode with a maximum cathode field of 100 MV/m. To achieve long lifetimes, our photocathode development concentrates on robust metals such as copper, yttrium and samariu...

Technology of photocathode production

Thin film photocathodes have been developed both for gas and vacuum based photodetectors. Over the last years we have gained experience in fabricating large area reflective CsI and semi-transparent monoand bialkali-cathodes, i.e. Rb2Te and K2CsSb: Today we are producing stable cathodes with excellent quantum efficiency for large MWPC based pad detectors and Hybrid Photodiodes on a routine basis...

Infrared Photocathode Research

Femtosecond Photocathode Electron Source*

A photocathode-based low-emittance femtosecondbunch electron source is developed in Osaka University to reveal the hidden dynamics of intricate molecular and atomic processes in materials through experimentation such as time-resolved pulse radiolysis or time-resolved electron diffraction. The transverse and longitudinal dynamics of femtosecond electron beam in the photocathode rf gun were studi...

Emittance correction of photocathode gun

The standard emittance calculation removes linear correlations between transverse displacement r and the divergence r' Higher order correlations remain and they are responsible for a substantial area m phase space which corresponds to the calculated emittance. Time-dependent correlations are identified and different procedures (transverse and longitudinal laser shaping, rf quadrupole) are propo...