2017-03 Tracker summary » History » Revision 8
h1. 2017-03 Tracker summary The tracker group have looked at the reconstruction from digits to tracks for several runs from each configuration and found that the tracker reconstruction is working well. There are some unexplained features which we are looking into but the data looks good and we have seen nothing to suggest new data must be taken so far. A subset of these runs are shown below with explanations of the plots. https://indico.cern.ch/event/691779/contributions/2839280/attachments/1581579/2499443/VC_TrackerDataQualityJan2018.pdf h2. Digits After the summer warm up a significant proportions of channels in the were lost. Since there are a number of unused connections hardware changes could be made to reduce the impact of the losses. This resulted in a significant amount of work trying to minimise the spacepoint loss. This sometimes meant increasing the number of dead channels seen in the data in order to group them into certain planes. In the end 9 waveguide swaps were made 5 US and 4 DS and the spacepoint loss was reduced to ~1% and significant recalibration work was also required and successfully completed. However, the effect can be seen in the digits so this should be taken into account when looking at the following plots. What we do see however is that the digits are stable across many runs of different types which shows that the digit level data is good. A selection of three runs for different cooling channel settings are shown below. Run 9728 LH2 Empty 10-140+M3-Test4 !Digits_Up_1.png! !Digits_Up_2.png! !Digits_Down_1.png! !Digits_Down_2.png! Run 10420 LiH Empty 6-240+M3-Test1 !Digits_Up_1_10420.png! !Digits_Up_2_10420.png! !Digits_Down_1_10420.png! !Digits_Down_2_10420.png! Run 10567 Wedge 6-240+M3-Test1 !Digits_Up_1_10567.png! !Digits_Up_2_10567.png! !Digits_Down_1_10567.png! !Digits_Down_2_10567.png! h2. Clusters Run 10108 LH2 Empty 10-140+M3-Test4 !Clusters.png! Run 10420 LiH Empty 6-240+M3-Test1 !Clusters_10420.png! Run 10567 Wedge 6-240+M3-Test1 !Clusters_10567.png! h2. Kuno Plot Run 9728 LH2 Empty 10-140+M3-Test4 !Kuno.png! Run 10420 LiH Empty 6-240+M3-Test1 !Kuno_10420.png! h2. Spacepoints h3. Spacepoint Beam profiles Run 9728 LH2 Empty 10-140+M3-Test4 !Spacepoint_Doublets_Up.png! !Spacepoint_tripets_Up.png! !Spacepoint_Doublets_Down.png! !Spacepoint_tripets_Down.png! Run 10420 LiH Empty 6-240+M3-Test1 !Spacepoint_Doublets_Up_10420.png! !Spacepoint_tripets_Up_10420.png! !Spacepoint_Doublets_Down_10420.png! !Spacepoint_tripets_Down_10420.png! h3. Spacepoint Summary plots Run 10108 LH2 Empty 10-140+M3-Test4 !Spacepoint_Types_in_Stations.png! !SPSummary.png! Run 10420 LiH Empty 6-240+M3-Test1 !Spacepoint_Types_in_Stations_10420.png! !SPSummary_10420.png! !Spacepoint_Types_in_Stations_10567.png! !SPSummary_10567.png! h2. Tracks Run 9728 LH2 Empty 10-140+M3-Test4 !TrackCanv.png! Run 10420 LiH Empty 6-240+M3-Test1 !TrackCanv_10420.png! Run 10567 Wedge 6-240+M3-Test1 !TrackCanv_10567.png!