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Physics Shift Report

Start Date: 09-24-2017
End Date: 09-28-2017
Start Run: 9683
End Run: 9772
Physics shifter: Tanaz A. Mohayai

Summary of Runs

Run Number Purpose
9683 - 9699 Emittance reduction - LH2
9701 - 9714 LH2 filling - 200 MeV/c optimisation, scaling from 3-200+M3-Test1
9715 - 9716 LH2 filling - 200 MeV/c optimisation, momentum tuning
9717 - 9721 LH2 filling - momentum scan
9717 - 9720 LH2 filling - momentum scan
9721 Beamline tuning at 140 MeV/c for better matching - LH2 full - Solenoid mode
9723 - 9734, 9736 Emittance reduction - LH2 full - Solenoid mode
9735 Beamline tuning at 140 MeV/c for better matching - LH2 full - Solenoid mode
9736 - 9747 Emittance reduction - LH2 full - Solenoid mode
9749 - 9771 Emittance reduction - LH2 full - Solenoid mode
9772 Scattering study, LH2 full - Cooling Channel magnets OFF

Elog, CDB, and Reconstruction

Elog entries are ok.

CDB uploaded ok with the exception of runs 9709, 9722, 9731, 9746, 9748, 9753.

Online reconstruction is ok with the exception of runs 9709, 9722, 9731, 9734, 9746, 9748, 9751, 9753.

TKD had poor effeciency, and there were very few tracks, in particular in Station4 (see SciFiReduce_TKD_triplet_xy.png).

This feature has been identified and reported by C. Rogers (https://micewww.pp.rl.ac.uk/projects/analysis/wiki/2017-09-23_physics-shifter). It has been appearing in runs 9683-9692 and the experts have now fixed it (see SciFiReduce_TKD_triplet_xy_9733.png).

The issue with the 9740 live TOF space point reconstruction (see TofReduce_tof_spx-9740.png) seems to have been fixed.

Run Efficiencies

name runs lmc1234 tof1 tof2 time nevents us cut
2017-02-2 3-200-9760 [9760] 541869 491778 105515 1 hrs 22 mins 152295 5345
2017-02-2 6-200-9761 [9761] 532743 691559 378773 1 hrs 27 mins 192582 11358
2017-02-2 10-200-9763 [9763] 664063 1137000 340190 1 hrs 45 mins 235176 19529

Analysis

C. Rogers noticed a bump in the TKD momentum at ~ 50 MeV/c (below) in run 9726 (red is all particles, black is muons in tkd_p.png).

The PzvsPt of the same run is in PzvsPt_2.png (muons only). A. Dobbs believes this to be a reconstruction issue (particularly for the new MAUS v-3.0.0).

Updated by Mohayai, Tanaz Angelina over 4 years ago · 36 revisions