J. Arianer et al., THE ORSAY POLARIZED ELECTRON SOURCE FROM A FLOWING HELIUM AFTERGLOW, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 337(1), 1993, pp. 1-2
A polarized electron source was designed at Orsay. We have chosen to a
dapt the flowing helium afterglow source working at Rice University be
cause it provides a very high polarization. We have investigated a new
way for the optical pumping of the helium metastables. An 85% electro
n polarization was reached.