Pulsed laser deposition (PLD) has been proposed several years ago as a suitable technique to deposit a pure Mg film over a radio frequency (rf ) gun Cu backflange in order to obtain a high efficiency photocathode surface for the generation of high brightness electron beams. In this paper we report preliminary experimental results on the emission properties of a PLD grown Mg film within the high...

Solar Water Splitting Electrically connected and optically paralleled photoelectrochemical-photovoltaic tandem architecture is placed on the coast in sunlight. A photovoltaic cell produces electricity provides it to a photocathode. silicon photocathode, which consists of TiO2 nanorods passivation layer MoS2 nanoplates, submerged under sea water generates hydrogen gas. As can be seen from enlarg...

Recently, a new generation of compact photomultipliers exhibiting high sensitivity, fast time response, extremely low background and extended dynamic range has been introduced. The electron multiplication is enabled by a high-gain and extremely low-background, closed-end, channel electron multiplier serving also as a body of the new mini electron tube. By preventing ultra-fine leaks by the intr...

CuO, as a promising photocathode material, suffers from severe photocorrosion in photoelectrochemical water splitting applications. Herein, Cu3N protection shell was used to protect the CuO for first time effectively suppress of CuO. Consequently, Cu3N-protected shows improved stability, retaining 80% its initial current density 20-min test, while only 10% can be retained bare photocathode. Thi...

Electron plasma columns continuously injected into a Malmberg-Penning trap display a rich evolution. Electrons emitted from an illuminated photocathode are trapped in the electrostatic well formed by the negatively biased photocathode and the trap end cylinder. Initially, the injections form cylinders of uniform density. As the density increases, the columns hollow in an attempt to match the po...

The Stanford Linear Accelerator has been running with polarized electrons both in the collider (SLC) mode and in the fixed target mode. The accelerator's polarized electron source is based on a thin, strained GaAs photocathode, which is held at a negative high voltage and illuminated by a Titanium Sapphire laser. The reliability of the source was better than 95% during the eight-month-long 1993...

We have studied the UV sensitivity degradation of CsI and KBr thin films under UV illumination and the stability of their visible light rejection for CsI and KBr opaque photocathodes evaporated on microchannel plates. For both materials the greatest degradation of the relative quantum detection efficiency (QDE) was observed near the photocathode sensitivity cut off, while there was almost no ch...

To improve the understanding of optical image resolution transmission-mode GaAs photocathode, by establishing surface scattering analysis model AlGaAs window layer, we have researched effect height distribution variance σ on transfer function (STF) and point spread (PSF) photocathode. The simulation results show that decrease is beneficial to resolution. This improvement mainly attributed in in...

New hybrid photocathode assemblies were used in the photoelectrochemical CO 2 reduction presence of an ionic liquid that acts as both absorbent and electrolyte.

Since 2006, we have been developing a novel photocathode gun gated by the laser-induced Schottkyeffect. This new type of gun utilizes laser coherency to aim at a compact femtosecond laser oscillator as an IR laser source using Z-polarization on a metal photocathode. This Z-polarization scheme reduces the laser photon energy to excite the cathode with a longer wavelength by reducing its work fun...