Operator: ajmasch
at the beginning of the shift, i moved R24 from 3750V to 3800V. it held nicely there. multiple times throughout the shift, i tried to raise it to 3825V. inevitably, the same things always occurred: 1) it held nicely at 3250V for a minute or two, 2) R24 then tripped, and 3) repeated attempts to bring it back to 3825V would result in immediate tripping. so i left it at 3800V. somewhere in the middle of the shift, it started tripping at 3800V and even 3780V, so now it's at 3750V.
it should be also noted that the helium flow in the chambers has been increased from 3 to 4l/min. this is because the water in the wc refrigerator ran out and we had to refill it and try to get it to spread throughout the chamber quickly.
i'm not sure that the polarization is quite as good as michael's e-mail last evening. someone has been modifying show_deep_asym_all_47.C and changed the number of bins that was fitted. for michael's e-mail, the fitted range was broken up into six bins. the polarizations and chi^2 are below:
A_ed_V Point Asymmetries vs Q2 Sector L: 0.542305 +- 0.0644605
with Chi^2/ndf of 15.3571/5
A_ed_V Point Asymmetries vs Q2 Sector R: 0.454665 +- 0.0436109
with Chi^2/ndf of 2.87768/5
the chi^2 are pretty high. on the other hand, if you switch the macro back to what it originally was and has been for as long as i've been aware, then you get the following:
A_ed_V Point Asymmetries vs Q2 Sector L: 0.448637 +- 0.0680356
with Chi^2/ndf of 0.227377/1
A_ed_V Point Asymmetries vs Q2 Sector R: 0.430263 +- 0.0458056
with Chi^2/ndf of 0.591507/1
the chi^2 are much lower and the left/right dilutions now agree. so with this limited data (only 2.6kC!!!!!), i'd have to say that h*Pz = 0.44 or so, not higher.
but this is only for 2.6kC, i repeat...
good runs:
14372-14376 14378-14384
This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:32 EST