...
The image MuonWithFullLAT shows the distribution of energy deposited in the calorimeter when a muon goes through it. This is a typical image. The muon deposites energy (11.2 MeV in average) in a crystal from each layer. A clear track is visualized, and consequently the direction of the muon event can be (up to some precision) reconstructed for a large fraction of the events using only information from the calorimeter. The distributions of the variables Trk1ZDir and CalZDir are shown in MuonSLACReconstruction.gif, MuonSLACReconstruction.ps and MuonSLACReconstruction.root (gif, ps and root files). Note that (for this data and selection applied) the muon direction in the calorimeter (CalZDir) is properly reconstructed for most of the events, as expected.
Muon events from Cosmic Ray runs taken with Calibration Unit (Pisa, July 2006)
The data run used is 700000460.
The events discussed below (both distributions and FRED images) were selected with the following criteria:
TCut cut = "TMath::Abs((acos(Tkr1ZDir)*(180./3.14159))-180.) < 5 && CalEnergyRaw>10";
Important Remark
The calibration of this run is not perfect, yet it is roughly ok, within 10-20% (estimated from the location of the muons peaks). I took this run because the calibration seems to be much better than in dedicated muon runs ()
- https://confluence.slac.stanford.edu/download/attachments/13893/Paneque_BeamTest_20060718.pdf?version=1
- https://confluence.slac.stanford.edu/display/BeamTest/CAL+Energy+Calibrations
The image MuonWithFullLATshows the distribution of energy deposited in the calorimeter when a muon goes through it. This is a typical image. The muon deposites energy (11.2 MeV in average) in a crystal from each layer. A clear track is visualized, and consequently the direction of the muon event can be (up to some precision) reconstructed for a large fraction of the events using only information from the calorimeter. The distributions of the variables Trk1ZDir and CalZDir are shown in MuonSLACReconstruction.gif, MuonSLACReconstruction.ps and MuonSLACReconstruction.root(gif, ps and root files). Note that (for this data and selection applied) the muon direction in the calorimeter (CalZDir) is properly reconstructed for most of the events, as expected.
Electrons @ 5 GeV
David please include run numbers
...