User name R. Michaels
Log entry time 11:07:03 on August 8,2005
Entry number 151134
This entry is a followup to: 150792
keyword=Q2 updateThis is about Q2 which is not a quad ;)
With Tim's recent database the angle reconstruction looks ok,
see fig 1 (run 2373, sieve with C12) but it can still be improved.
One issue is that the average momentum shifted a HUGE amount (4 MeV
on L-arm, 7 MeV on R-arm) so I'm not sure this is under control yet.
Also, none of the Qsq team possess a recent HRS survey and there is
some confusion about when it was done (Curtis says it was in May),
so for now I still use 6 degrees.
With all those caveats fig 2 shows the Q2 distributions
for 3 triggers on each arm for run 2367. It shows the 3 triggers
give the same result. Note, the Left arm Q2 changed
a whopping 13% compared to halog 150792, and I need to hunt down
the reasons - it is worrisome - probably a mistake (before or now).
FIGURE 1
FIGURE 2
