Updates on TT11
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PS2 meeting 16 April 09 Updates on TT11 Christoph Hessler, Brennan Goddard, Malika Meddahi
description
Updates on TT11. Christoph Hessler, Brennan Goddard, Malika Meddahi. New TT11 layout. PS2, new lattice, moved by 2 cell lengths. 2 more cells added in TT11 @ PS2 extraction location (+ 2x21m). SPS. TT10. PS2, fodo lattice, original position. PS2, new lattice, moved by 3 cell lengths. 33 m. - PowerPoint PPT Presentation
Transcript of Updates on TT11
PS2 meeting 16 April 09
Updates on TT11
Christoph Hessler, Brennan Goddard, Malika Meddahi
PS2 meeting 16 April 09 800 900 1000 1100 1200 1300 1400
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2700 PS2, new lattice,moved by 2 cell lengths
TI 2
33 m
SPS
TT10PS2, fodo lattice, original position
PS2, new lattice,moved by 3 cell lengths
2 more cells added in TT11 @ PS2 extraction location (+ 2x21m)
New TT11 layout
PS2 LSS for inj. / extr.
MTEBK ExtKESMS1MS2DuKInjK InjS
BD+1st sec
Prim2nd secMTEBKT
Courtesy W. Bartmann
H- injection
p injection (TT10)
To SPS
Additional 2 cells
EE insertion –version 2
PS2 to SPS
PS2 TT10 TT11
Skew quads
Additional 2 cells
SPS
PS2 to SPSE. ExchangeVersion 2
PS2 to SPSE. ExchangeVersion 2
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For CNGS beam at 50 GeV, with 0.1% dp/p, this dispersion mismatch causes n blowup of 0.5 m in V plane (0.0 m in H plane).
Already looks reasonable – and further optimisation certainly still possible
Performance with emittance exchange version 2
xn [m] yn [m]
PS2 before extraction 15 8
TL after MTE extraction ~4 8
TL after emittance exchange 8 ~4
SPS after filamentation v1 9.3* ~6.6*
SPS after filamentation v2 9.0* ~4.5*
SPS “now” (with MTE) ~8.5* ~4.5*
Normalised emittances from PS2 to SPS for CNGS beam
*assuming 0.5 m n increase from other mismatch sources
Source: Brennan Goddard for PS2 review May 08
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EE insertions: version 3
PS2 to SPS
PS2 TT10TT11
Skew quads
Additional 2.5 cells
SPS
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PS2 to SPSE. ExchangeVersion 3
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PS2 to SPSE. ExchangeVersion 3
No dispersion mismatch
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No dispersion mismatch, no corresponding emittance blow-up!
Performance with emittance exchange version 3
xn [m] yn [m]
PS2 before extraction 15 8
TL after MTE extraction ~4 8
TL after emittance exchange 8 ~4
SPS after filamentation v1 9.3* ~6.6*
SPS after filamentation v2 9.0* ~4.5*
SPS after filamentation v3 8.5* ~4.5*
SPS “now” (with MTE) ~8.5* ~4.5*
Normalised emittances from PS2 to SPS for CNGS beam
*assuming 0.5 m n increase from other mismatch sources
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What’s next?
- Check / correct new geometry- Check optics for other beam types- Aperture- Trajectory correction- Magnet specs
