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Particle ID in the MICE Beamline

Particle ID in the MICE Beamline. Paul Soler, Kenny Walaron University of Glasgow and Rutherford Appleton Laboratory. MICE Collaboration Meeting 30 March 2004. Aims. Carry out particle identification in the MICE beamline using scintillation detectors.

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Particle ID in the MICE Beamline

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  1. Particle ID in the MICE Beamline Paul Soler, Kenny Walaron University of Glasgow and Rutherford Appleton Laboratory MICE Collaboration Meeting 30 March 2004.

  2. Aims • Carry out particle identification in the MICE beamline using scintillation detectors. • Use dE/dx signature to differentiate between protons and pions/muons at different positions along beamline: e.g. before Q1 and at input and output of solenoid. • Use PID information to qualify and monitor beamline simulation. • Caveat: This talk is more a statement of intentions than results. MICE Collaboration Meeting 30 March 2004

  3. MICE Beamline Layout: MICE Collaboration Meeting 30 March 2004

  4. MICE Beamline Layout: MICE Collaboration Meeting 30 March 2004

  5. MICE Beamline Working assumption: solenoid magnet inside the beamline • Insert scintillator recording planes for PID Transport of particles in MICE beamline (LAHET simulation from proposal) MICE Collaboration Meeting 30 March 2004

  6. MICE Beamline New beamline layout (Tilley/Roberts) PID scintillators? Q1 Q2 Q3 TOF1 TOF1 Diffuser2 B1 Decay Solenoid Proton Absorber B2 Q4 Q4 Q5 Q6 Q7 Q8 MICE Collaboration Meeting 30 March 2004

  7. GEANT4 Beamline Simulation • MICE beam simulation prepared in GEANT4 (see Tom Roberts presentation 24/9/03 and 14/1/04) showed differences between G4 and other simulations: 57% difference! Need to validate simulations by measuring rates, profiles and particle ID along beamline. MICE Collaboration Meeting 30 March 2004

  8. g4beamline • Have commenced to work with g4beamline simulation (thanks to Tom Roberts for providing beta versions) • Need to insert scintillator elements into simulation and run under different configurations • Still learning how to run simulation and (especially!) compile new configurations. • Questions to be answered: • What is optimal position for PID scintillators? • What is particle rate at each of potential scintillator positions? • What type of segmentation needed to withstand rate? MICE Collaboration Meeting 30 March 2004

  9. Particle ID in beamline • Particle identification in beamline: dE/dx for proton separation • Scintillator: protons less than 400 MeV/c deposit >8.5 MeV/cm, while pions/muons deposit 1.6-4.0 MeV/cm MICE Collaboration Meeting 30 March 2004

  10. Scintillator layout • Would aim to have as little segmentation as possible • If rate proves to be a problem, perform segmentation, with smaller segmentation in centre. For example: Scintillator Waveguides Waveguides PMTs PMTs • Double sided readout allows to measure energy, independent of position of particle along scintillator. MICE Collaboration Meeting 30 March 2004

  11. Conclusions • MICE beam simulation prepared in GEANT4 by Tom Roberts to be used for beam and PID studies • Have started working with it, but still need to learn more about programme and try to run different configurations. • In the process of including particle ID elements to enable design of scintillators (ie. segmentation, thickness) to cope with particle rates. MICE Collaboration Meeting 30 March 2004

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