sPHENIX HCal discussion

[Edouard Kistenev <kistenev AT bnl.gov>]

John, this is great but the novelty of this setup is limited to new 
electronics not to calorimeter itself.
For two years I am wandering around begging to design and build a very simple 
support stand which will allow for rotating the prototype around horizontal 
axis (estimates converge around 2 months time to design/order and assemble) - 
at some time it almost started but … no exthusiasm from project management 
was always able to kill the idea. Maybe the move to HCal lab will help to 
revive it - it is something really important. At this moment we have little 
or no idea of how the calibtration will change when towers are repositioned 
to their final destination and will calorimeter modules in some pecuiliar 
orientation (vetical axis) be able to produce enough of measurable signals 
for triggering or trigger must be correlated between Outer/Inner and emcal.
                        Edward

 
> On Jun 12, 2017, at 9:14 AM, John Haggerty <haggerty AT bnl.gov> wrote:
> 
> Anthony and I set up the Inner HCAL (which is now in the HCAL lab) to take 
> cosmics on Friday and we took a few runs over the weekend.
> 
> Some other notes and remarks:
> 
> - Taking cosmic data pointed out to me that I didn't stretch the trigger 
> input to the GTM when I set it up, and since the trigger input is 
> re-clocked to the 10 MHz clock in the GTM, it misses trigger inputs in 
> where there is no overlap between the input and the clock; the effect of 
> that is that the triggers are still random, but you don't get as many as 
> you could.  I stretched the signal so it's 120 ns long.
> 
> - We were running out of room in
> /sphenix/data/data01/caladc
> at RCF where we stash the data, so Chris gave us space in
> /sphenix/data/data03/phnxreco/
> and I moved all the stuff that used to be on data01 to there.  Probably I 
> could just delete it, but I thought we'd keep it around for a while.
> 
> - There are two files of cosmics (about 3500 events) in
> 
>> /sphenix/data/data01/caladc/hcallab
> 
> with 14 bit goodness; we tried to keep the channel ordering the same as 
> before (64-95), but the high and low gain channels are switched around (for 
> the afficionados, we needed to reverse the polarity of the signal relative 
> to what we had in the HBD electronics, so we flipped the slice on the 
> preamps, which switches even and odd).  The good stuff is here:
> 
>> cosmic_2017_06_09_17_14.prdf
>> cosmic_2017_06_11_16_32.prdf
> 
> triggered by paddles under "column 0" of the Inner HCAL.
> 
> -- 
> John Haggerty
> email: haggerty AT bnl.gov
> cell: 631 741 3358
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