User name M JOnes
Log entry time 17:49:20 on November10,2000
Entry number 51834
keyword=map of beam polarization
map of beam polarization from elog 129163
Total uncertainty 2%
keyword=Beam polarization map of Gun2 photocathode
The QE and beam polarization measurements performed yesterday by Matt Poelker and Michael Steigerwald using the 840 nm Hall C diode
laser are shown as a beam polarization map of the Gun2 photocathode.
The beam polarization was measured at (1200,1500) with each of the Hall A (TiS), Hall B (diode) and Hall C (diode) lasers and found to be the
same within the uncertainty of the measurement. Given that we believe each of these lasers is at 840 nm, the magnitude of the beam polarization
should be the same from each of the three lasers.