Articles you may be interested inElectron beam generation in a diode with different ferroelectric cathodes Electron beam generation using a ferroelectric cathode AIP Conf. Proc. 472, 918 (1999); 10.1063/1.58887High brightness electron beam produced by a ferroelectric cathode

A pulsed ferroelectric electron cathode with a current density of up to 45 A based on ceramic is presented. The experimental set-up for the cathode triggering allowed us to achieve a perveance of more than P and an energy spread in the generated electron beam as low as 100 eV (FWHM).

We report experimental results of the operation of two ferroelectric cathodes of relatively large size. The first cathode had a diameter of 10.2 cm and was built in the Pierce cathode geometry by Integrated Applied Physics (IAP). It achieved emission currents of up to 1.2 kA (15.3 A/cm 2 ) at voltages upto 100 kV, in 150 ns pulses. The second cathode had an annular shape with a diameter of 11.4 cm and a width of 0.25 cm.It was built at MIT to produce an annular electron beam for use in a Gyrotron microwave source. It operated at currents of up to 10 A (1.1 A/cm 2 ) at 8 kV, in 5 µs pulses. Detailed operating characteristics for each of these electron sources are reported. These results indicate that ferroelectric cathodes can be used to produce electron beams of large area and size, with high total operating current and pulse lengths of several microseconds.These sources should be suitable for use in future microwave generation experiments.