mu+ Polarization Query

[Tom Banks <tbanks@socrates.berkeley.edu>]

I'm not through with you yet!  I also have a question for our in-house
PiE3 beam experts:

Can you tell me the direction of mu+ polarization during Run8, as well as
the approximate polarization percentage?  Bernhard contends that the mu+
were polarized in the direction of the beam momentum--that is, the spins
were pointed downstream--and that the polarization fraction is something
like 80%.  I'm primarily concerned with the orientation, since this would
help me to develop a consistent picture of polarization direction,
magnetic field direction, and spin precession.

Thanks,
Tom