Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

Present: Alexei, Flemming, Jim, Yuri, Gene, and myself == Hardware — TPC was started and a laser run taken — looked at backgrounds with beam on — a successful laser run was conducted — got a drift velocity — currently 5. 53 rather than 5. 55 cm/us

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

== Hardware

— TPC was started and a laser run taken

— looked at backgrounds with beam on

— a successful laser run was conducted

— got a drift velocity

— currently 5.53 rather than 5.55 cm/us (may be due to nitrogen, historically?)

— so, we know the TPC can hold voltage

— will be conducting laser runs everyday (at least one per shift = 3 per day)

— found a big leak in connected six-pack

— a new one will be brought today

— should last until Feb. 6th

— all other gases should be sufficient to last to end of STAR running

— will request a cosmics run (access at 3 pm today, will start calorimeter)

— Gene asks how many good laser tracks do we see on each side

— Alexei says its better than 10, but this is based on visibility (not DV calculation)

— magnet is currently full field

— yesterday tested all day (warm) and last night (colder)

— waiting for backup chiller to arrive at BNL

— will connect to ensure we have a good backup

== Electronics

— Tonko planning to start systems and ensure we are ready

— no changes in RDO outages

== Software

— Gene will be working on SC for Run25 p+p and Au+Au

— Yuri ran RHF reconstruction chain to check for use with FXT

— don’t know the effect on net proton

== AOB

— Nothing new brought up this week

Best Regards,

  Richard

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