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Physics Shift Report

Start Date: 19/09/2017
End Date: 23/09/2017
Start Run: 09618
End Run: 09628
Physics shifter: Chris Rogers

Summary

Attempted to ramp magnets; but magnet experts have struggled to ramp. Running straight tracks for alignment and TOF calibration

Elog, CDB

Elog is okay

CDB is okay

Online reco

Looks okay. Note that tracker has some dead areas; tracker group has been notified. Also note that there are some spills that are coming through onrec as "0"; i.e. run number 0, spill number 0, no recon events. Durga thinks it is "normal" DAQ misfiring type events

Detectors

TOF

For run 09628

  • TOF0 failed calibration 0.09 % out of range 2.21 % Okay 97.7 %
  • TOF1 failed calibration 0.0 % out of range 0.0 % Okay 100.0 %
  • TOF2 failed calibration 2.73 % out of range 4.91 % Okay 92.36 %

Delta TOF between slabs is attached (RMS is ~twice the TOF resolution). It looks not bad given that there is a calibration coming.

  • tof_validation.pdf is the difference between slabs of all formed space points
  • tof_validation_raw.pdf is the uncalibrated difference between slabs; fileld is the uncalibrated difference for formed space points; dashed is the uncalibrated difference for all slab hit combinations.

Tracker

  • 2017-10-21 There is evidence for some dead channels in the tracker. See this email (cut n paste)
  • 2017-10-22 A new mapping was developed to try to resolve some of the dead areas and reconstruction proceeded with this new mapping and calibration during the day on 21st October; following this the space point reconstruction in tkd looked to have poor efficiency and few tracks were formed (tkd made tracks in less than 10 % of events that made a good track in upstream and a space point in tof2). It is also noted that at the same time the solenoid field was ramped (so helical tracking) and a new MAUS version went out; but likely cause is the new mapping/calibration. Experts are investigating.

Beamline tuning

Analysis

Data rates/etc after cuts. Aim is to get 1e5 "good muons" for each beamline setting, i.e. muons in the "us cut" column.

name runs lmc1234 tof1 tof2 time nevents us cut ds cut
2016-04 1.2 3-140-9659 [9659] 1687730 675336 375824 2 hrs 4 mins 387555 45559 1683
2016-04 1.2 3-140-9660 [9660] 1692847 687797 382610 2 hrs 10 mins 400436 47507 1796
2016-04 1.2 6-140-9662 [9662] 57568 26791 11208 0 hrs 5 mins 15807 1846 27
2016-04 1.2 6-140-9663 [9663] 1159737 539173 224165 1 hrs 35 mins 309935 37167 1440
2016-04 1.2 6-140-9664 [9664] 998892 747666 108394 1 hrs 32 mins 376548 18751 445
2016-04 1.2 6-140-9665 [9665] 1375337 629355 261628 1 hrs 52 mins 353562 42292 1580
2016-04 1.2 6-140-9666 [9666] 1041647 443838 184485 1 hrs 2 mins 227014 25857 954

Predicted Rates

2017-09-25_predicted_rates
2017-10-14_data
2017-10-21_lsq

Updated by Rogers, Chris about 5 years ago · 24 revisions