A laser-induced Schottky-effect-gated photocathode gun has been in use since 2006. This new type of gun utilizes a laser’s coherency to create a compact laser source using Z-polarization of the IR laser on the cathode. This Z-polarization scheme reduces the laser pulse energy by reducing the cathode work function due to the Schottky effect. Before this epoch-making scheme emerged as a concept, ...

Abstract We report an unusual regime of emittance self-compensation in electron bunch generated the blow-out mode by a radio-frequency photocathode gun. This is observed for strong space-charge field on cathode reaching around 30%–35% accelerating field. Simulations clearly show initial growth and subsequent projected divergent originating from effects of: (a) forces mirror charges cathode, (b)...

The KArlsruhe TRitium Neutrino experiment (KATRIN) is currently in under construction, with plans to be activated in 2010. The experiment will measure the energy of electrons recoiling from the three body beta decay of Tritium (Hydrogen with two neutrons) in order to obtain the mass of the neutrino. The experiment will be sensitive down to 0.2ev/c 2 . My thesis focuses on the one of the calibra...

The effect of electron beam irradiation of stoichiometric hydroxyapatite (Ca10(PO4)6(OH)2, HAP) is investigated using electron energy loss spectroscopy (EELS) in the scanning transmission electron microscope (STEM) mode equipped with a LaB6 gun. Initial irradiation at 160 A cm −2 dose rate shows no modification of the low loss spectra. No difference of mass loss for Ca, O and P is observed for ...

To generate high quality synchrotron radiation in the future ERL light sources, the performance of the ERL injector, which has critical components, a photo cathode gun and super conducting cavities, is very important. In the injector, an electron beam is generated by photo cathode DC gun, and accelerated by super conducting RF cavities. Since an electron beam with −77 pC bunch charge and 1.3 GH...

M. Jabłońska, I. Bednarczyk, K. Rodak, A. Śmiglewicz Silesian University of Technology, Faculty of Materials Science and Metallurgy, Institute of Materials Science Katowice, Poland This paper presents the results of structure analysis of Fe Al alloys after hot rolling deformation. Microstructure analysis were performed before and after deformation using a scanning transmission electron microsco...