Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

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

== Hardware

— will clean gas system 

— prepare for recovery of purifier

— lasers working well as of yesterday

— will check sensors tomorrow with Yuri and discuss measurement of TPC movement during field flip

— retreat was yesterday

— information on gas limits was forwarded to CAD

— cabinets were cleared of old stock

— questions on limits were sent to CMS (Chemical Management System)

— limit was returned as 3,000 ft^3 (6-pack alone is 2,000 ft^3)

— looking for was to redistribute supply so as to come within limits

== Electronics

— presentations (Flemming and Tonko) were circulated and placed on the agenda page

— priority for next Run is to fix things and make small optimization changes, nothing major

— Gene mentioned we should also look test of system at 5k (limited this year due to run stop)

== Software

— Calibration production with larger vertex window is nearly done (about 5% left)

— still pushing on SC in Run 22 

— may be some interest in preproduction of Run 22 data

— might need an early SC calibration to make that happen

— 2023 data 

— offline vs online comparison of cluster finders should be repeated, should not be any change

— want to check quality of cluster finder in 2023 data

— want to revisit alignment using cosmics, but cannot currently access data

— last three days in particular

— HPSS blocked by production and HLT farm down(?)

— request in carousel appears to be blocked (sitting for 2 weeks)

— Looking at simulations (PHQMD model)

— difference in slewing between east and west in FXT

— cluster sizes and shapes are different in east vs west

— for FXT a different correction will be needed in east than in west

— dE/dx in FXT vs collider mode

— some strange behavior noted in some data samples

— trying to finish combined PID and can compare with different productions

== AOB

— Was mentioned at retreat, after Run 25, all the computing systems in the counting area will be de-commissioned (HLT farm, etc.)

— Cool-down will be Jan. 8th

— starting species is still undetermined (pp, AuAu, ?)

— PAC meeting Sept. 11-12th

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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