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Beam line summary

Beam line summary. paul drumm for beam line group. Beam optics status. G4BL: 240 MeV/c scaled from 200 MeV/c gives same emittance and more tracks (x1.6) - early results. Design goals:.  Extrapolation. MeV/c. Matching: Fixed & Scaled Tracker fields. CM14-e-p tunes.

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Beam line summary

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  1. Beam line summary paul drumm for beam line group

  2. Beam optics status G4BL: 240 MeV/c scaled from 200 MeV/c gives same emittance and more tracks (x1.6) - early results • Design goals: Extrapolation MeV/c Matching: Fixed & Scaled Tracker fields CM14-e-p tunes Collimation below 3-6p TT: Transport & Turtle G4: G4Beam line

  3. Comments • Fringe fields and matching point not a good choice • Implies a retune of parameters for G4BL • Implement a new cross over point  2do • In reality – varying (e.g) the last three quads may be a faster tool than the present design tools • Real time processing / automation • maximise by track info from (e.g.) three tracker planes

  4. Correction studies • Beamline steering correction (DJA) - For muon transport section • Studies already completed for CM14-1-200 and CM14-6-200 cases • Poss layout already proposed for downstream steering magnets. (1H, 2V) • Studies supplemented by scenario for CM14-10-200 case:- • New TS1 or TS2 correctors seem suitable (?) + 1 mm position , 0 angle H,V Cases + 1 mm position , 0 angle H,V Cases

  5. Beam to diffuser 3 s 2 s 1 s 10p beam

  6. Beam to diffuser 3 s 2 s 1 s …careful look to optimise available area

  7. Beam line optics summary • Diffuser & metal work restricts to <3s, but >2.5s • (maybe 2s at 140 MeV/c) • Diffuser size: • needs to be larger to investigate the aperture • there is some room for adjustment in the design • Collimation studies need to be more realistic • Inform engineering design • Correction dipoles • Baseline position needs more study

  8. Beam line schedule ….

  9. Beam line geometry

  10. Beam line engineering

  11. Comments • 1st quad triplet engineering details close to completion • Next complete design of D1 stand and vac box • Pushing Dipole 1 to saturation: • not absolutely necessary! • limitation partly due to solenoid aperture • parameter: magnet gap (6” is ok ) – but what is the optimum? • Partly unmapped territory • Collimation • Used perfect collimation so far • no real engineering design yet • Steering magnets • Have a scheme • needs further evaluation • Engineering solution available • Need to update model with details of Ckov1 !

  12. Review • Stability of geometry? • current design status • Initial engineering • Fixed: q1, q2, C/L D1 • Treat as modules: what is the risk? • e.g. D2, T456, T789 • Process – transport – turtle – G4BL • 1st pass?

  13. Finally • Bottleneck has been simulation • Transport Turtle loop (DA/KT) • outer G4BL simulation loop (TJR/KW) • Matching/emittance conditions (CR) • Tom Roberts • welcome return to group • Additional support • new position at Brunel now filled • at least 50% on beam line

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