Download - Beam line summary
Beam line summary
paul drummfor
beam line group
Beam optics status
• Design goals:
p
1 6 10
240 ~G4
200 TT
~G4
TT
G4
TT
~G4
140 ~G4
CM14-e-p tunes
Extrapolation
MeV
/c
Matching:Fixed & ScaledTracker fields
Collimation below 3-6
G4BL: 240 MeV/c scaled from 200 MeV/c givessame emittance and more tracks (x1.6)
- early results
TT: Transport & TurtleG4: 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 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
pos
ition
, 0
ang
le H
,V C
ases
+ 1
mm
pos
ition
, 0
ang
le H
,V C
ases
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 <3but >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
T Target Sheffield
A Pion Capture ISIS
B Decay Solenoid
EID
C Muon Transport Channel
Liverpool?
D Diffuser Oxford
Beam line engineering
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 !
Review
– Stability of geometry?
• current design status
– Initial engineering
• Fixed: 1, 2, C/L D1
• Treat as modules: what is the risk?
– e.g. D2, T456, T789
– Process – transport – turtle – G4BL
– 1st 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