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Particle Information from Beamline Simulations

Particle Information from Beamline Simulations. K. Walaron Univ. of Glasgow/ R.A.L. Overview. Beamline introduction Details on beamline parameters for 6/10pi beamlines Beamline simulations XY plots (TOF0/TOF1/CKOV1) Ptot plots (TOF0/TOF1/CKOV1) TOF separation

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Particle Information from Beamline Simulations

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  1. Particle Information from Beamline Simulations K. Walaron Univ. of Glasgow/ R.A.L K.Walaron PID review (Oct 12th 2006) R.A.L

  2. Overview • Beamline introduction • Details on beamline parameters for 6/10pi beamlines • Beamline simulations • XY plots (TOF0/TOF1/CKOV1) • Ptot plots (TOF0/TOF1/CKOV1) • TOF separation • TOF v Ptot with approximated resolution

  3. Goals of beamline • Provide matched beams of variable emittance and momenta • P =140,200,240MeV/c. Emitt4D=Low,6,10pi mm mrad • Provide pion/muon separation

  4. Beamline Layout Quad triplet Quad triplet CKOV1 (old design) TOF1 TOF0 Dipole 2

  5. Beamline Simulations • Tracking program used is G4Beamline (GEANT4 based) • No sensitive detector implementation in G4beamline. Only MC truth output of particles crossing planes. • Analysis chain: Track beam using G4BL Many runs with Pi+ decay off Run with Pi+ decay on Output ascii files To produce high pi+ stats ~100M pi+ tracked from target To produce mu+ stats ~10M pi+ tracked from target C++/scripts order tracks and output Root file Analysis in root Didn’t have time to make plots look nice. Apologies in advance.

  6. TOF’s and old CKOV implementation TOF0 & TOF1 implementation Old CKOV implementation (z=21.060)

  7. New CKOV 1a and 1b implementation Assumption

  8. 6pi 200 MeV/c (215.31 <Emu<252.2) Red=NEW, BLUE=OLD TOF1 TOF1 TOF0 CKOV1 TOF0 CKOV1 TOF1 TOF0 CKOV1 TOF1 TOF0 CKOV1

  9. 10pi 200 MeV/c(215.31 <Emu<252.2) Red=NEW, BLUE=OLD TOF1 TOF1 TOF0 CKOV1 TOF0 CKOV1 TOF1 TOF0 CKOV1 TOF1 TOF0 CKOV1

  10. XY dist TOF0 (combined pi/mu for 6pi and 10pi y (cm) x (cm) x (cm) 10pi 6pi

  11. CKOV1 beam spot No cut on singles y (cm) x (cm)

  12. XY dist TOF1 (combined pi/mu for 6pi and 10pi y (cm) x (cm) x (cm) 10pi 6pi

  13. Ptot dist TOF0 (combined pi/mu for 6pi and 10pi Ptot (MeV/c) Ptot (MeV/c) 10pi 6pi

  14. Ptot dist CKOV1 (combined pi/mu for 6pi) Ptot (MeV/c)

  15. Ptot dist TOF1 (combined pi/mu for 6pi and 10pi Ptot (MeV/c) Ptot (MeV/c) 10pi 6pi

  16. TOF (combined pi/mu for 6pi and 10pi 10pi 6pi

  17. Gaussian TOF spread MC truth V MC truth_spread

  18. TOF (MC truth) v Ptot@Tracker1 (MC truth) 6pi, 10pi. T (ns) Ptot (MeV/c)

  19. TOF (spread) v Ptot@Tracker1 (MC truth) 6pi, 10pi. 70ps gaussian spread on TOF0 & 1 70ps gaussian spread on TOF0 & 1 T (ns) Ptot (MeV/c) 10pi mm mrad 6pi mm mrad

  20. Beamline purity (sampled at TOF0)

  21. Rates old/new CKOV designs (uncollimated) OLD NEW

  22. Rates with new CKOV design and collimation (6pi tune only) 21cm horiz collimation 11cm horiz collimation

  23. Conclusions • Detector sizes are at least sufficiently wide to capture the particles making it to tracker1. Make them smaller.. • Implementation of new CKOV design should provide no problem for future tunes. • Singles rates are a problem for TOF0. Likely to need collimation to bring rate down to required 1.5 MHz. • Real conclusions should be from reviewers! 

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