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Effect of ending the gap cleaning on the star backgrounds in 27GeV

Around 5pm on 5/17/18 Angelica turned off the gap cleaning to see the effect this had on the STAR backgrounds.

TPC Field Cage Currents in AuAu27 for Runs 18 and 11

 First, I show what appears to be a clear correlation between the TPC field cage currents on day 134 (May 14th) and Jeff's metric of the "big" events that we understand to be associated

Mike Lisa - talk on polarization and magnetic field at WPCF 2018

The talk is scheduled for Friday, 25 May at WPCF: indico.ifj.edu.pl/event/199/

G4

Single track propagated by G4 through ROOT geometry... current track ID=135 is an ionization electron created within the TPC.

QM2018 talk

 

Jet energy uncertainty from BEMC response to hadrons

TPC Cathode Power Supply Humidity Dependence

 

Run XVIII T0

 

Fill by fill analysis of bunch cleaning for 27GeV

I've looked at the large events across long periods.    

Detailed Analysis of the effect of bunch cleaning for 27GeV events.

Starting in the 27GeV run we started to see abnormal charge steps in the tpc: