sPHENIX EMCal discussion

[John Haggerty <haggerty AT bnl.gov>]

On 9/27/17 5:12 PM, Sean Stoll wrote:


> _Rear Position / With __HCal__(Mount to Inner __HCal__)_
>
> •Translate (X) to move out of beam (HcalOnly) ?
> •Rotate 90deg for calibration ?

Here are some thoughts; I agree with the first part.  For the second part:

I was hoping to talk us out of moving the EMCAL relative to the IHCAL 
when it's downstream, that we could get that out of our system while 
it's on the 2c table, and when it moves downstream, it's just where it 
is, and if we do any tilting, we tilt the whole blue table a few degrees 
either way.  And I think we should be able to get our fill of HCAL-alone 
data while the EMCAL is upstream on the 2c table; we can move it aside 
at night, for example.

The one motion I think we might not be able to do without is to be able 
to move the EMCAL left and right in front of the IHCAL, because they 
can't really rig it into place to mm.  We had tracks for the IHCAL in 
the 2016 test, it might work to just move the EMCAL+IHCAL assembly.

I hope we can come to consensus on this tomorrow.

--
John Haggerty
email: haggerty AT bnl.gov
cell: 631 741 3358