Researching the characteristics of photo- and thermoemission cathodes

The description of the stand for research photo-and thermoemission cathodes for an accelerator Linak-800 electronic gun is given. The structure of the equipment and the basic characteristics of the stand are described. The stand allows us to tune the control electronics, calibrate the operating and measuring channels, and debug the software. Introducing the structure of the equipment of the mass spectrometer stand with a leaking sub-system enables us to analyze the gas structure of vacuum volume and to change its structure, depending on the task at hand. Using the stand with a laser with 1064 nm, 532 nm, 355 nm, and 266 nm wavelengths allows us to investigate a wide spectrum of materials for photocathode. The cathode assembly model and the simulation results and their coordination with experimental data are described. Issue characteristics of the impregnated cathode (tungsten with 20% barium, calcium and aluminium oxides) are presented. Data on the research of this cathode as a photocathode (with heating and without it) with a 532 nm wavelength laser are given.