Star-tpc-l mailing list

[Richard Witt <witt AT usna.edu>]

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

== Hardware

— working on laser system

— prototype for TPC displacement measurement

— but first approach seemed to work

— will use single camera with mirror reflector

— Bill working on survey device

— Gene asks about ability to turn on magnet

— limited by ability to reinstall pole tips

— likely won’t happen until early spring at soonest

== Electronics

— nothing new reported this week

== Software

— Gene reports that reconstructed tracks real tracks look different in some embedding samples than real track in production data

— noticed in AuAu27 from 2018

— ensured same chain, library, and dB version (from checking log files) except for some dB tables that are expected to be different

— Yuri mentioned that cluster finder is different but Tommy has done cluster finder comparison 

— Yuri is continuing work on dE/dx

— noticed some false sagitta for positive and negatives tracks that was not present a year ago 

— seeing dependence on particle type not on beta gamma

== AOB

— Tommy looked at O+O (2001), difference (oscillation) in RFF and FF  east vs west reconstructed y position of PV 

— see link to be posted to TPC list

— may be opposite rotation angle in FF, so maybe wrong field in dB

— Yuri checking with protons and antiprotons

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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