Beam line summary paul drumm for beam line group

Beam optics status Design goals: pp 11 66 10  240~G4 200TT ~G4 TT G4 TT ~G4 140~G4 CM14-e-p tunes Extrapolation MeV/c Matching: Fixed & Scaled Tracker fields Collimation below 3-6  G4BL: 240 MeV/c scaled from 200 MeV/c gives same emittance and more tracks (x1.6) - early results TT: Transport & Turtle G4: G4Beam line

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

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

1  2  3  Beam to diffuser 10  beam

Beam to diffuser 1  2  3  …careful look to optimise available area

Beam line optics summary Diffuser & metal work restricts to 2.5  (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

Beam line schedule ….

Beam line geometry TTargetSheffield APion CaptureISIS BDecay Solenoid EID CMuon Transport Channel Liverpool ? DDiffuserOxford

Beam line engineering

Comments 1 st 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 !

Review –Stability of geometry? current design status –Initial engineering Fixed:  1,  2, C/L D 1 Treat as modules: what is the risk? – e.g. D 2, T 456, T 789 –Process – transport – turtle – G4BL –1 st pass?

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