Polarized Photoguns and Prospects for Higher Current More specifically: What will it take to provide 1 mA at 85% polarization? M. Poelker Jefferson Lab
Spiricon CCD camera razor blade stepper motor scans (not shown) 'old way' ... 'QE Scan' using lens attached to stepper motor x/y stage. Used 5 mm hole ...
Workshop on Sources of Polarized Electrons and High Brightness ... The round fringes are Fresnel diffraction ripple due to the aperture in the laser transport ...
... photoemission from a Gallium Arsenside crystal inside a ... Gallium Arsenide Photocathodes ... Optical pumping Gallium Arsenide between P and S. 3/2. 1/2 ...
Thomas Jefferson National Accelerator Facility. J. Grames, SPIN'06, Oct. 2-9, Kyoto, JAPAN ... operational lifetime in support of new accelerator initiatives. ...
Goal: Deliver high average current ( 1mA) and high polarization ... Enhance our understanding of photocathode ... UHV IP supplies gauge activation. Keyed ...
for photo current, and two deposition. rate monitors allowing co-evaporation, ... characterized by fast voltage restoration that assures low commutation jitter, ...
Gun Issues for New High Current CW Machines ~ 100 mA Unpolarized Beam for Light Sources ... Expect to enjoy the same charge density lifetime, despite higher ave. ...
Perform Research and Development on charge-production by ... Alkali-halide Cathodes. Metal Cathodes. An inventory on diagnostic methods. Ellipsometry ...
(per interaction point, for a one-day lifetime) (Derbenev, Chattopadhyay, Merminga et al. ... Space-Time Structure of Photon. F2A/F2D. 10-4 10-3 10-2 10-1 1. x ...