sPHENIX EMCal discussion

[Edouard Kistenev <kistenev AT bnl.gov>]

Hi, everyone,  I missed morning planning session today and so here are my 1 
cent on the subject.

I suggest to start the run with whole system assembled on the stage. 
Beginning run with EMC 20m(?) upstream will deprive HCal of access to readout 
for at least a week (more likely until April 17th) and will make even cosmic 
data taking impossible. Working with all system components for the first few 
days will be valuable experience to everyone  and will give the HCal data  to 
analyse and to the whole system the ability to tune intercalibration while 
EMCal makes its work upstream in the beam line. The progress made in HB till 
today certainly tells us that this is possible.

I also suggest that in those few days of joint data taking we will 
concentrate on the momentum range covering what can be of importance (mostly) 
to future jet measurements - 4-10 GeV/c. 3 or 4 points to get good data on 
system liearity. We will need all PId tools in the beam running because the 
beam at those momenta is a mix of e/pi/k. Couple runs at the end with higher 
momenta. 

Then priority can be given to emcal running upstrem and finally to repeating 
full system running with emcal perfectly calibrated and understood.

We may take some data with HCal alone too either at the end of first period 
(by keeping readout at HCal for a few extra hours) or at the beginning of the 
third one (by moving readout first).

                        Edward