sPHENIX EMCal discussion

[Sean Stoll <stoll AT bnl.gov>]

John,

 That would certainly simplify the setup. I think there was also some 
uncertainty about the optimal positioning of the EMCal relative to the 
Inner and Outer HCals ?

Sean


On 9/27/2017 7:36 PM, John Haggerty wrote:
> 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.

--
Sean Stoll
Physics Associate
Brookhaven Nat. Lab
Upton, NY 11973
631.344.5331