400 MeV Transfer Line New Injection Scheme

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400 MeV Transfer Line New
Injection Scheme

• 400 MeV in a nutshell
• Optical Functions
• Matching to Booster lattice

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400 MeV in a nutshell

• Transfer Line (TL) is 65m long.
• TL is composed by

Active Elements Active Elements
Quadrupoles 16
Dipoles 7
Trims 13
Lambertson 1
Chopper 1
DCSep 1
Passive Elements Passive Elements
Beam Pos. Mon. 18
Beam Loss Mon. 14
Multi Wires 12
Toroids 3
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400MeV in a nutshell cont.
Line optics FO DO FO DO DO FO DO FO DO FO FO FO
DO DO FO FO Q2 Q3 Q4 Q5 Q6 Q7 Q8
Q9 Q10 Q11 Q12 Q13 Q14 Q15 Q16
Q17 Demo TL simulation is based on
MAD-8. Starting ½ LQ74 Ending Injection Foil
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Optical Functions
chute
Q13
ß max 64.0 m (vert.) D max 3.8 m (hor.)
Reasonable agreement with wire data
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TL Activation History
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Motivation for the
new injection scheme

• - Installation of new orbump magnets
• rearrangement of injection girder
• - Minimize the effect of beam motion due to field
  edges at injection
• remove existing DCSEP magnet
• - Major reconfiguration of the 400 MeV TL at
  injection
• rearrangement of the line downstream of Q13
• (preserving debuncher stationing)

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What needs to be changed?
One possible stationing would look
something like.
Unitmeter
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and for the quadrupoles
Device Start Final
BQ13 95.23 66.60
BQ14 4.973 2.91
BQ15 19.45 16.55
BQ16 15.82 16.35
BQ17 6.823 -5.72
Trivial changes!
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Comparison Existing Scheme vs New Scheme
ßx 6.412 ßy 23.276
ax -0.117 ay 0.017
ßx 6.292 ßy 20.997
ax -0.091 ay 0.092
Dx 4.0 Dx 2.149
Dy 0.075 Dy 0.81
Dx 1.79 Dx 2.180
Dy 0.78 Dy 0.037
400MeV Booster
400MeV Booster
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Conclusions

• A new injection scheme has been proposed.
• It was shown that is possible to match betas
• and alphas to booster lattice.
• However, matching to the dispersion function
  proved to be not so easy. Work continues

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END
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Quads Physical Length Physical Length Effective Length Effective Length
l_Q74 0.0700 m 0.0853 m
l_LL 0.2540 m 0.2906 m
l_Green 0.2540 m 0.2956 m
l_trim 0.2508 m
Instr.        
l_bpm 0.1880 m
l_rw 0.0508 m
l_mw 0.3302 m
l_tor 0.0699 m
l_bv 0.0620 m
Dipoles Physical Length Physical Length Effective Length Effective Length
l_lam 0.8493 m 0.8493 m
l_mv0 0.4681 m 0.6507 m
l_mh1 1.2192 m 1.3020 m
l_mv1 1.0668 m 1.1621 m
l_mv2 1.0668 m 1.1621 m
l_mh2 1.2192 m 1.3020 m
l_dcsep 1.2827 m 1.3205 m
l_orbmp 0.4830 m 0.5102 m
l_chopper 1.3825 m 1.3825 m
TF
11.46 T/kA
15.41 T/kA
52.64 T/kA
General Overview - Quadrupoles - Dipoles -
Instrumentation
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Transfer Line to Booster Ring
TL length to Booster ring 64.645 m
Beta-max (H) Beta-max (V) 32.13 m 56.16 m
Beta-min (H) Beta-min (V) 0.88 m 0.50 m
Dispersion at entrance 0 m
Dispersion Max (at injection foil) 4 m
Injection Point L01
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Efficiency gt95
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Booster Requires
Existing Line Booster simulation _at_ foil ßx
6.412 ßy 23.276 ax -0.117 ay
0.017 Dx 2.149 Dy 0.075
New Injection Scheme Booster simulation _at_
foil ßx 6.292 ßy 20.997 ax -0.091
ay 0.092 Dx 2.180 Dy 0.037
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New Injection Scheme Optics
However, more investigation is needed to
better match the dispersion functions!
It is possible to match ßs and as to booster
lattice
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What needs to be changed

• Ideal situation would be to preserve all the
  existing configuration up to Q13.
• The scheme being proposed requires a 17o
  horizontal bend downstream of Q13. One could
  accomplished this by using only 2 MH2 magnets
  (existing line has 3 of these magnets).
• 4 quads would then be located downstream of the
  bender to help matching into booster.