Transmission photocathodes based on stainless steel mesh and quartz glass coated with N-doped DLC thin films prepared by reactive magnetron sputtering

19th International Summer School on Vacuum, Electron and Ion Technologies

Balalykin, N.I.^1 ; Huran, J.^2 ; Nozdrin, M.A.^1 ; Feshchenko, A.A.^1 ; Kobzev, A.P.^1 ; Arbet, J.^2

Joint Institute for Nuclear Research, 6 Joliot-Curie Str., Moscow Region, Dubna

141980, Russia^1

Institute of Electrical Engineering, Slovak Academy of Sciences, 9 Dúbravská cesta, Bratislava

84104, Slovakia^2

关键词: Intensive lasers;    Laser energies;    N-doped diamonds;    Nitrogen concentrations;    Reactive magnetron sputtering;    Silicon substrates;    Stainless steel mesh;    Vectorial photoelectric effect;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/700/1/012050/pdf
DOI  :  10.1088/1742-6596/700/1/012050

来源: IOP

【 摘 要 】

The influence was investigated of N-doped diamond-like carbon (DLC) films properties on the quantum efficiency of a prepared transmission photocathode. N-doped DLC thin films were deposited on a silicon substrate, a stainless steel mesh and quartz glass (coated with 5 nm thick Cr adhesion film) by reactive magnetron sputtering using a carbon target and gas mixture Ar, 90%N2+10%H2. The elements' concentration in the films was determined by RBS and ERD. The quantum efficiency was calculated from the measured laser energy and the measured cathode charge. For the study of the vectorial photoelectric effect, the quartz type photocathode was irradiated by intensive laser pulses to form pin-holes in the DLC film. The quantum efficiency (QE), calculated at a laser energy of 0.4 mJ, rose as the nitrogen concentration in the DLC films was increased and rose dramatically after the micron-size perforation in the quartz type photocathodes.