Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

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

== Hardware

— Jan 7th-8th was large power dip

— several parts of the ring had no power

— STAR was without power for ~3 days

— restoration was a challenge

— lost Allen-Bradley interlock (1st time ever), CMOS battery had (finally) died

— Jim Thomas managed to recover Allen-Bradley 

— Prashanth helped get new system connected to interlock

— also cleared flag to allow update 

— system has been okay since last Friday

— Cathode was ramped yesterday

— no shorts appeared

— Tonko will start electronics testing

— possible will be an update at Ops meeting in couple hours

— Working to find uncertainty on target used for TPC position survey

— Expecting ~1 mm but currently unknown

— Start of run postponed until April 15th 

== Electronics

— Nothing new reported this week

== Software

— Working through issues with Richard Thrutchley having enough statistics per DAQ file for SC

— Yuri sees some tilts in sector positions

— needs uncertainties mentioned above to 

— Yuri also working on 5 years of cosmics to advance Irakli’s approach to alignment

— so far only ~20% improvement in momentum resolution

== AOB

— Nothing new reported 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

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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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