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Online Reconstruction Plots Descriptions¶
Online Reconstruction TOF plot descriptions¶
- nSpacePoints
- tof_nSpacePoints.png
- Number of reconstructed space points in a particle event
- Most of the events should have 1 space point. If the plot is dominated by 0 space-points, something could be wrong with the space point reconstruction.
- SpacePoints_X, SpacePoints_Y
- tof_SpacePoints_X.png
- tof_SpacePoints_Y.png
- 1d X,Y positions of the reconstructed space points.
- The mean X and Y should correspond to the the TOF pixel along the beam
- SpacePoints_XY_TOF0, ...TOF1, ..TOF2
- tof_SpacePoints_XY_tof0.png
- tof_SpacePoints_XY_tof1.png
- tof_SpacePoints_XY_tof2.png
- Y vs X distribution of reconstructed space points in TOF0,1,2
- Some pixels on the wings might be empty due to beam profile/statistics.
- If there are empty pixels that look suspicious - eg. empty pixel surrounded by populated neighboring pixels, check the SlabHits_X/Y distributions and look for the slabs corresponding to these pixels.
- SlabHits_X, SlabHits_Y
- tof_SlabHits_X.png
- tof_SlabHits_Y.png
- X, Y postions (slab numbers) of the slabs that were hit.
- These are the hits which are used to reconstruct space points.
- Expect the mean to correspond to the slab# aligned with the beam.
- Holes in the distribution should also have been picked up by the space-point plots. If there's reason to suspect a slab, look further at the pmtHits_ plots
- pmtHits_Plane...
- tof_pmtHits_Plane0PMT0.png
- tof_pmtHits_Plane0PMT1.png
- tof_pmtHits_Plane1PMT0.png
- tof_pmtHits_Plane1PMT1.png
- individual pmt hits in each slab/plane/station.
- These are the PMT hits which go into making a 'slab hit'
- In these plots,
- plane0 => refers to X ie. horizontal slabs
- plane1 => refers to Y ie. vertical slabs
- PMT0 => refers to north (south) PMTs on horizontal (vertical) slabs
- eg. pmtHits_Plane0PMT0: shows the north-side PMTs that were hit in the horizontal slabs and pmtHits_Plane1PMT1 shows the south-side PMTs hit in the vertical slabs.
- Typically both PMTs in a slab would register a hit; so, a hole in the distribution could be suggesting inefficient or dead channels.
- time_tof0-1, time_tof0-2, time_tof1-2
- tof_time_tof0-tof1.png
- tof_time_tof0-tof2.png
- tof_time_tof1-tof2.png
- Time-of-flight between TOF0->TOF1, TOF0->TOF2, TOF1->TOF2
- In the TOF0->TOF1 plot, electrons should show up at ~26ns
Online Reconstruction Ckov Plot Description¶
- Ckov arrival times
- imageCkovArrivalTimes_PMT1-8.png
- Arrival time of hits on each cerenkov PMT
- Ckov A is PMT 1-4
- Ckov B is PMT 5-8
- Ckov charge
- imageCkovCharge_PMT1-8.png
- Charge deposited on PMTs (integrated ADCs)
- Ckov A is PMT 1-4
- Ckov B is PMT 5-8
- Photoelectron yields vs time of flight
- imageCkovPE_A_vs_TOF_0_to_1.png
- imageCkovPE_B_vs_TOF_0_to_1.png
- Requires calibrated TOF
- High light yield indicates high velocity particles
Updated by Dobbs, Adam over 8 years ago · 17 revisions