sPHENIX HCal discussion

[John Haggerty <haggerty AT bnl.gov>]

Very nice, and congratulations to all!

The data seem to be written with a different hit format than the beam 
test data and emcal data we've taken... it seems to be 92 and we 
normally record 93.  Could we make it that?  Thanks.

On 2022-03-24 23:38, Martin Purschke via sPHENIX-HCal-l wrote:
> Dear all,
>
> at long last we had all the ingredients together to read out a sector
> of the HCal (sector 25 that happened to be connected) with a real
> sPHENIX digitizer. All other tests in 912 or 1008 had been done using
> the old PHENIX MBD electronics (and some were done with a DRS4). In
> order to avoid any surprises, we had long planned to read the HCal out
> with the "real thing". Today was the day.
>
> Dan, Stefan, Hanpu, and I took some pulser and LED data. This was
> interleaved with other rigging work in the AH, but we got some useful
> runs.
>
> I have first renamed the files to some more meaningful names (the DAQ
> setup will become more polished tomorrow and over the weekend to do
> that out of the box) and have uploaded them to the RCF at
>
> /sphenix/data/data02/sphenix/hcal/1008
>
> There are directories for LED, Pulser, cosmics (no cosmics files there 
> yet).
>
> There are 48 connected channels out of the 64 that the digitizer has,
> 0-23 the south half, and 24-47 the north half of the sector.
>
> For a quick look, I attach single event displays of the 48 channels vs
> the 31 waveform samples for north + south (the LED/pulser works on a
> half sector at a time). Those are LED runs.
>
> One of the questions we had that was already answered today: the
> polarity of the signals is right.
>
>
> We later switched to sector 2 at the about 6 o'clock position, where
> we installed (or tried to) a cosmic ray telescope with 2 scintillator
> paddles, one in the magnet and one underneath the barrel (Dan and
> Stefan took some pictures). Unfortunately, while both worked just fine
> in a test when I set up the coincidence logic the day before, I could
> not get the lower one to hold HV today (maybe b/c we had drizzling
> rain and high humidity today?). Since I had to leave early today, for
> now I used just the upper one, which of course is a really poor
> trigger. But I do see a cosmic signal here and there. More tomorrow.
>
> The list of runs and some more info in the ELog at
>
> https://sphenix-intra.sdcc.bnl.gov/WWW/elog/HCAL/1432
>
> Best,
>         Martin
>
>
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---
John Haggerty
haggerty AT bnl.gov
cell: 631 741 3358