User name Eugene
Log entry time 19:16:53 on February18,2002
Entry number 83096
This entry is a followup to: 82986
keyword=More on the previous Moller measurement
The results quoted in the entry#82986
were obtained with open attenuator and closed slit.
The current leakage from Halls B/C was low - about 1%, however
the beam current asymmetry was very high - about 0.6%.
We also made a measurement with a different condition:
slit open and strong attenuation. In this conditions
the current leakage from Halls B/C was about 60nA, or 20%
of the full current used for Moller measurements. The beam
asymmetry was about 0.04%. The leak-through
beam is polarized with the same sign as the Hall A beam, but
the value of polarization was lower - about 60%.
The measured polarizations are:
Slit --closed 1.0% leakage: P= 76.6+/-0.2%(stat)
Slit -opened 20.% leakage: P= 73.3+/-0.2%(stat)