Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

Present: Alexei, Flemming, Tommy, Gene, Yuri, Jim, Frank, and myself

== Hardware

— tuning procedure for survey related measurements

— gas systems is ready

— need to replace 2 oxygen sensors (1 in hand, 1 needs to be ordered)

— also need to do methane sniffer calibration

== Electronics

— talked with Tim

— had to fix 2 readout boards on east side

— those are expected to be the last one

— all that should be left is testing after pole tips are closed, etc.

== Software

— Richard Thrutchley has needed to be away so SC work is currently paused

— pp500 BEMC calibration are moving forward

— towers outside TPC sector 18 are seeing significantly reduced matching

— Z close to endcap sees better matching than closer to central membrane

— probably not space charge and should not be grid leak (but…?)

— Gene looking more closely into it

— Continuing work on alignment

— looking at high voltages

— looks like different direction of electric field in different sides of TPC (perhaps due to sag?)

— Some difference in dE/dx between P21 and P23 production 

— helium band not easily visible for eta<-2

— J/Psi team checked 2019 data set with new calibration (4.5 GeV FXT)

— do not see any degradation

— asked to repeat for 2020 data sample

== AOB

— Possible topics for collaboration meeting

— DAQ 5k?

— alignment work?

Best Regards,

  Richard

Sent from my iPad

-- 
"Education is the most powerful weapon which you can use to change
the world."

--Nelson Mandela

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 Richard Witt, Professor of Physics     Phone (USNA): 410-293-6675
    United States Naval Academy         Email: witt AT usna.edu
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