Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

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

== Hardware

— TPC running well

— lasers started and we have cosmic rays

— gas system was interrupted yesterday, has been restored

— leak has increased somewhat, started around 1.2-1.3 l/min

— running forward full field right now

— expecting first collisions around April 22nd

== Electronics

— running well

— Tonko has been checking along the way

— we have about 16 hours (wall clock) of FF data

— Flemming will do a first pass dead channel scan

== Software

— some cosmic data has been run through fast offline

— hope to have some produced soon

— Run 22 pp 500 SC

— Richard T. working on fill-by-fill study, preparing required software tools

— calendar will free-up somewhat in May, April will be busy

— jobs for voltage power supplies, magnet and lasers started

— jobs for laser runs after a day failed

— running time for processing laser jobs is very long (>1 day for a job)

— usually ~10 seconds per event and about 2-3 hours for a file

— we have big files, about 4000 events per file, but watching process

— have cosmics from level 4 as of yesterday

— will process as soon as we have drift velocity for this run

— can then make statement on quality of data so far

— Alexei will examine last day of laser runs to see if there is any issue

== AOB

— Flemming, Yuri, and Gene met with eTOF folks to talk about alignment

— some slides at eTOF page

— issue may be related extrapolation of track out to eTOF

— helix model parameters and constant magnetic field assumptions at eTOF

— work is ongoing, several suggestions were made for possible diagnostics to check

— maybe O+O data, for example 

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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