sPHENIX HCal discussion

[John Haggerty <haggerty AT bnl.gov>]

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