Log entry time 08:01:01 on February 14, 2009

Entry number 261110

Shift Crew

SL : Jin Huang
TO: Yawei Zhang
3rd: Navaphon Muangma

Major Events 

production shift with lots of BB HV loss-connection alarm. Don't interefere with data taking though.

• 12:00 Start with Smooth running
• 12:24 Changing T6 Thr to -80mV
• 12:25 Strarting run 1404; Prescale to 0 T1; 1KHz T2; 100Hz T6; Off line 180K events DT = 5.7% (could be smaller due to less events are replayed)
• 12:31 Starrting run 1405; Prescale to 0 T1; 2KHz T2; 170Hz T6; Off line 1M events DT = 3.9%
• 1:50 Starting run 1409; Prescale to 0 T1; 3KHz T2; 200Hz T6; Off line 1M events DT = 6.3%
• 3:41 NMR -> Pol. = 60%
• 4:37-4:52 Compton tuning
• 4:55 Recover Production
• 6:50 Restarting HV GUI; Try to solve frequent lost connection alarm; not quite effective
• 7:30 NMR -> Pol. = 60%;
• 7:30-7:40 Spin direction flip; X- -> X+; Before flip, polarization is 60.6%; after it's 59.97%.
• 7:40 Starting both production run with inversed spin: 1422; 20190

Replay is set up at farm machines:

Please view the user instruction at http://hallaweb.jlab.org/experiment/transversity/analysis /analysis.html.

Also the preliminary rule for farm disk usage at https://hallaweb.jlab.org/wiki/index.php/Off_Line_Analysis_for_transvers ity#General_Rule_for_Farm_Disk_Usage