sPHENIX HCal discussion

[Anthony Michael Hodges <ahodges21 AT student.gsu.edu>]

Hi everyone, 

I appear to be in need of a nice long break away from our tile tester. In yesterday's meeting, on slide 31, I showed a rough approximation of the light output of the new pilot tiles compared to their older counterparts. Well, somewhere along the line I read the channels in backwards (they go 0-7 and top to bottom on the CAEN, whereas I read them in 0-7 bottom to top when I was doing the analysis). In other words, the labels on the plot on slide 31 are reversed, and the new pilot tiles are seeing a 30% increase in MPV on average over the previous production according to the test I ran. I'll fix my slides and re-upload them immediately. 

Now, once again this isn't the end of this investigation, but I guess instead of going into the holiday break cautiously pessimistic about the new tile performance, you can now be cautiously optimistic. 

Sorry for the confusion, and happy holidays!

-Anthony 

Anthony Hodges

PhD. Student, Georgia State University

Nuclear and High Energy Physics

ahodges21 AT student.gsu.edu

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From: sPHENIX-HCal-l <sphenix-hcal-l-bounces AT lists.bnl.gov> on behalf of Lajoie, John G [PHYSA] <lajoie AT iastate.edu>
Sent: Thursday, December 20, 2018 12:32:53 PM
To: sphenix-hcal-l AT lists.bnl.gov
Subject: [Sphenix-hcal-l] the "reactor" at Uniplast

 

Dear HCAL'ers:

    At the HCAL meeting yesterday there were questions about the reference to a "reactor" at Uniplast. I pinged Edward and here's his response:

Hi, John, “reactor” is the name for chemical equipment which holds the volume where chemicals are mixed and reaction occurs.  The whole property where UNIPLAST is located belongs to holding company (or whatever is left from preexisting research and industrial conglomerate “POLYMERSYNTES”). Uniplast is one of the space renters using its own and some of the old rental equipment. Holding company keeps control of the space allocation, energy, maintenance, waste etc. 

Reactors are many in this place, not much can be done if the one nearest to you needs to work when you do your testing, noise is through the power lines and in this place they typically consume ~20kwt of power each. 

Igor made the noise conditions study to learn of times in the day when environment is reasonable, since that study all measurements are done either early morning or weekend. 

So not the kind of "reactor" we were thinking of....

Regards,
John

John Lajoie

Professor of Physics

Iowa State University

 

(515) 294-6952

lajoie AT iastate.edu