منابع مشابه
Investigation of Laser-cleaning Process on Lead Photocathodes
To verify the process of laser-cleaning on metal cathodes we performed a combined photoemission (PE) and scanning electron microscope (SEM) study. We followed the laser-cleaning procedure on thin Lead films arc-deposited on Mo-substrates by means of photoemission in the photon energy range of 16 – 140 eV and determined the surface roughness before and after laser irradiationwith whitelight-inte...
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Recent experiments at the Stanford Linear Accelerator Center (SLAC) [l] have demonstrated that the photoemitted number of electrons from a cesium-activated gallium arsenide (GaAs) crystal saturates at high incident flux, becoming insensitive to the incident photon flux at high intensity. This article offers a physical model that attempts to explain this phenomenon. A comparison of experimental ...
متن کاملDiamond Amplifier For Photocathodes
We report a new approach to the generation of high-current, high-brightness electron beams. Primary electrons are produced by a photocathode (or other means) and are accelerated to a few thousand electron-volts, then strike a specially prepared diamond window. The large Secondary Electron Yield (SEY) provides a multiplication of the number of electrons by about two orders of magnitude. The seco...
متن کاملOptical properties of bialkali photocathodes
The optical properties of the ‘‘bialkali’’ KCsSb and RbCsSb photomultiplier cathodes have been experimentally investigated in the visible range. The measurements carried out include the absolute reflectance at near-normal incidence, the polarization-dependent relative reflectance at various angles and the change in polarization upon reflection from the photocathode. These experimental inputs ha...
متن کاملPolarized photocathodes make the grade *
Future linear colliders will require high levels of performance from their electron sources. A group at SLAC has recently tested a structure that substantially exceeds current collider polarized electron source pulse-profile requirements. Published in CERN Courier 42 (September 2002), p 19. Work supported by Department of Energy contract DE–AC03–76SF00515.
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ژورنال
عنوان ژورنال: Physical Review Special Topics - Accelerators and Beams
سال: 2008
ISSN: 1098-4402
DOI: 10.1103/physrevstab.11.013502