Beam line summary

velodromeryeUrban and Civil

Nov 15, 2013 (3 years and 11 months ago)

76 views

Beam line summary

paul drumm

for

beam line group

Beam optics status


Design goals:

e

p

1
p

6
p

10
p

240

~G4

200

TT

~G4

TT

G4

TT

~G4

140

~G4


CM14
-
e
-
p tunes


Extrapolation

MeV/c

Matching:

Fixed & Scaled

Tracker fields

Collimation below 3
-
6
p

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 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

1
s

2
s

3
s

Beam to diffuser

10
p

beam

Beam to diffuser

1
s

2
s

3
s

…careful look to optimise available area

Beam line optics summary


Diffuser & metal work restricts to <3
s,
but

>2.5
s


(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


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:
q
1
,
q
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