Electron-Muon Ranger (EMR)

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Kristin Fowler
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1 Electron-Muon Ranger (EMR) Ruslan Asfandiyarov MICE Video Conference April 11, 2013

2 Construction Construction quarter of the detector completed (12 planes) every plane tested (LED / Camera / image analysis) fiber bundles are being produced (this is the longest step) three first planes are used for cosmic test bench Ruslan Asfandiyarov, Electron-Muon Ranger (EMR) MICE Video Conference, April 11, 2013

(this is the longest step) three first planes are used for cosmic test bench

3 Construction full electronics chain is being tested configuration board (VCB) + FEB read-out board (VRB) + DBB (64-ch. PMT) flash ADC (1-ch. PMT) cosmic trigger is generated by coincidence of two planes middle one is readout at both ends Ruslan Asfandiyarov, Electron-Muon Ranger (EMR) MICE Video Conference, April 11, 2013

PMT) cosmic trigger is generated by coincidence of two planes middle one is

4 EMR Scheme

5 Ionization 1 Geant4 E Scintillation 2 n 1 = E α 3 P(µ = n 1 ) n 2 Trapping 4 n 3 = n 2 β 5 P(µ = n 3 ) n 4 Attenuation and loss in fiber 6 n 5 = n 4 γ δ 7 P(µ = n 5 ) n 6 PMT response and anode non-uniformity 8 n 7 = n 6 ε η 9 P(µ = n 7 ) n 8 response 10 n 9 = n 8 τ 11 G(µ = n 8, σ = ) n 9 E [MeV] - deposited energy α [1/MeV] - number of photons per MeV n 1 - number of photons from scintillation n 2 - randomly sampled n 1 according to Poisson P(µ = n x ) - Poisson distribution β - trapping efficiency n 3 - number of photons trapped by fibre n 4 - randomly sampled n 3 according to Poisson γ - fiber attenuation factor δ - connector loss factor n 5 - number of photons which reach PMT n 6 - randomly sampled n 5 according to Poisson ε - quantum efficiency of PMT η - PMT anode non-uniformity n 7 - number of photoelectrons n 8 - randomly sampled n 7 according to Poisson τ - number of ADC counts per photoelectron n 9 - number of ADC counts G(µ = n x, σ = ) - Gaussian distribution α, β, γ, δ, η, τ and can be measured experimentally all parameter are used in simulation parameters are used in the simulation

scintillation n 2 - randomly sampled n 1 according to Poisson P(µ = n x ) - Poisson distribution β - trapping efficiency n 3 - number of photons trapped by fibre n 4 - randomly sampled n 3 according

6 : Example parameters: Construction number of scintillation photons per MeV: 8000 trapping efficiency: PMT photocathode quantum efficiency: 0.2 number of ADC counts per photo-electron: 8 spread of PMT response in ADC: 10 Energy deposition (MeV) Digitized signal (ADC counts)

002 PMT photocathode quantum efficiency: 0.

7 : Comparison with Cosmics Simulation (3 GeV, µ ) Real data (cosmic) Relatively good agreement between simulation and data digitization parameters has to be measured experimentally

8 Fibers, Bars, Planes Localization

9 Light Loss Non-Uniformity in Connectors light loss in connectors exhibit non-uniform behaviour this is measured using LED-Camera test system light loss for every individual bar is measured and used in digitization

measured using LED-Camera test system light loss for

10 Light Loss Non-Uniformity in Connectors Energy Deposition per Plane, 200 mev/c muons Energy deposition (MeV) Digitized signal (ADC counts) this can be corrected offline

11 Energy Localization 200 MeV/c muons Construction energy depositions of hits within 10 ns are more localized this will improve precision

12 Rejection of Decay Electrons Total Energy (in MeV) in Full Detector for 200 MeV/c muons All hits (MeV) Hits within first 10 ns (MeV) Resolution = 8.8% Resolution = 3.5%

13 Rejection of Decay Electrons Total Energy (in ADC) in Full Detector for 200 MeV/c muons All hits (ADC) Hits within first 10 ns (ADC) Resolution = 10.99% Resolution = 8.15%

14 Summary Summary Current Status 12 planes done / construction ongoing full electronics chain is being tested simulation implemented (preliminary version in MAUS) digitization developed (not in MAUS yet) analysis has been started

tested simulation implemented (preliminary version in

Electron-Muon Ranger (EMR)

Electron-Muon Ranger (EMR) Digitization and Reconstruction François Drielsma Ruslan Asfandiyarov University of Geneva On Behalf of the EMR Group 38 th MICE Collaboration Meeting February 23, 2014 Electron-Muon