[G14_run] comparison of pass0 v8 versus v9

[Reinhard Schumacher]

Hi Franz,
	I'm glad you found the reason for the problem!
Reinhard

___________________________________________________________________
Reinhard Schumacher         Department of Physics, 5000 Forbes Ave.
Carnegie Mellon University, Pittsburgh, PA 15213, U.S.A.
phone: 412-268-5177         web: www-meg.phys.cmu.edu/~schumach
___________________________________________________________________

On 08/26/2013 10:31 PM, Franz Klein wrote:
> Peng,
> you presented a comparison of E asymmetries using pass0 version 8 and
> version 9 data and got exactly the opposite for the gold2 period.
> I tried to figure out the different settings we tried over the last 6
> months: changing the helicity delays, considering 2nd half wave plate or
> not ...
>
> The v9 helicity data obviously have corrections for the 2nd half wave
> plate, which does not make sense (at least in Hall C nor for Moeller
> runs in Hall B). Also: considering the 2nd H.W.P. caused a general sign
> change but did not help with solving the problems with the January data.
> I just commented out these lines - sorry I should have done it after our
> tests were done in May!
>
> As pointed out in the last meeting: we'll wait for a few changes in DC
> calibrations and ST calibrations and will do another pass - neglecting
> pass0v9 completely.
>
> Sorry,
> Franz
>