High Intensity Reflection Interferometry for Weak Sources

High Intensity Polarized Electron Sources*

The status of the polarized electron source development program at SLAC will be reviewed. Emission currents of 60 A, corresponding to a space charge limited current density of 180 A/cm2. have been obtained from GaAs photocathodes. Electron beam polarization 20% greater than that obtainable from GaAs cathodes has been observed from multilayer &As-GaAlAs structures. Work in progress to produce hi...

Physics with High Intensity Neutron Sources

Intensity interferometry with anyons

A pairwise correlation function in relative momentum space is discussed as a tool to characterize the properties of an incoherent source of noninteracting Abelian anyons. This is analogous to the Hanbury-Brown Twiss effect for particles with fractional statistics in two dimensions. In particular, using a flux tube model for anyons, the effects of source shape and quantum statistics on a two-par...

H Ion Sources for High Intensity Proton Drivers*

Spallation neutron source user facilities require reliable, intense beams of protons. The technique of H charge exchange injection into a storage ring or synchrotron can provide the needed beam currents, but may be limited by the ion sources that have currents and reliability that do not meet future requirements and emittances that are too large for efficient acceleration. In this project we ar...

Safety standards and measurement techniques for high intensity light sources.