Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

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

== Hardware

— finished with TPC and ToF gas system recovery and recalibration

— will start work on lasers next week

— will change lamps on east laser, do alignment, check power

== Electronics

— all RDO repair work done on west 

— 5 bad RDOs on east 

— some FEEs will need to be masked due to power consumption limits

== Software

— data from AuAu 19.6 GeV from 2019 was processed into calibration sample

— was some concern about SC contributing to that

— was reprocessed without SC to check effect on mass splitting

— h-/h+ result with and without SC show very little difference

— expectation is no effect would be observable on mass splitting due to SC

— similar results from 14.5 GeV

— sector by sector fluctuations are likely not due to SC, more likely alignment

— these results are not sensitive to global improvements (or detriments) to the TPC

— dE/dx calibration for 19.6 GeV and fixed target sample

— iteration requires 2-3 days (due to CPU issues)

— need one more week

— HTR CPU sees increase in CPU time for processing

— with new hit errors there is a refit that produces some increase

— two times more iteration is required with new hit errors to ensure change in parameters is with 10% of sigma

— these effects produce increase in CPU time

— some time required to decide on response

— on average hit errors are factor 2 smaller in parameterization than old 

— see link in most recent S&C agenda for presentation with more detail

— 14.5 GeV 

— we should check mass splitting of protons in this set

— some eta dependence in fixed target data for pull (relative q/pt)

— see https://www.star.bnl.gov/~fisyak/star/muMc/2019FXT

  — TFG software installed on new system

— queueing system is running on new system

— would like to have software functioning on that system as well

== AOB

— No new topics for this week

Best Regards,

  Richard

Sent from my iPad

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

--Nelson Mandela

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