FCC INJECTION AND DUMP LAYOUT W Bartmann FHI

FCC INJECTION AND DUMP LAYOUT W. Bartmann FHI Meeting, 13 th Jan. 2015

04/12/2014 FCC inj/extr, BT R&D meeting 2 FCC injection - NC Lambertson septum QF MKI QD TDI • 500 m quad half width clearance of 540 mm • Rms beam size at inj of 0. 6 mm, +/-10 sig, +/- 3 mm orbit beam clear 18 mm • Beam offset in quad is 18 mm, required quad diameter inside chamber 36 mm • First septum blade 6 mm, requires beam separation of 24 mm at septum entrance

04/12/2014 FCC inj/extr, BT R&D meeting Optics detuning for 125 m halfcell 3

04/12/2014 FCC injection - NC FCC inj/extr, BT R&D meeting 4

04/12/2014 FCC injection - NC FCC inj/extr, BT R&D meeting 5

04/12/2014 FCC injection - SC • Septum width 24 mm FCC inj/extr, BT R&D meeting 6

04/12/2014 FCC inj/extr, BT R&D meeting 7 FCC injection - SC 4 T: 113 and 118 m resp.

04/12/2014 FCC injection - SC FCC inj/extr, BT R&D meeting 8

13 -Jan-2015 FCC dump, FHI meeting 9 FCC injection – next steps • Increase half cell to 150 m relax magnet strengts, make space for instrumentation and protection devices • Maximum betas of 620 m

13 -Jan-2015 10 FCC dump, FHI meeting Conventional dump design 110 m Quads of 4 m length 500 T/m • Extract the two beams from different straight sections • Same plane deflections - or is Lambertson preferred? 400 m 100 m Rms sigma ~ 1 mm Assume otherwise max of 0. 5 mm

13 -Jan-2015 FCC dump, FHI meeting Extraction trajectory – no bump MKE: • 0. 15 mrad • 110 m drift Q 5: • 9 mm offset MSE: • 35 mm offset at entrance • 150 m drift to MSE • 17 mm septum width • 50 m for TCDQ • 200 m for MSE • 417 mm Q 4 clearance • 1. 7 mrad, 284 T. m, 1. 42 T 11

13 -Jan-2015 Extraction bump FCC dump, FHI meeting 12

13 -Jan-2015 FCC dump, FHI meeting Extraction trajectory with bump MKE: • 0. 15 0. 13 mrad • 110 m drift Q 5: • 9 mm offset Bump: • 9 mm • 0. 3 mrad 50 T. m • 360 mm beam sep at bumper 3 MSE: • 35 mm offset at entrance • 150 m drift to MSE • 17 mm septum width • 50 m for TCDQ+2 bumpers • 200 m for MSE • 417 mm Q 4 clearance • 1. 7 mrad, 284 T. m, 1. 42 T 13

13 -Jan-2015 SSC like FCC dump, FHI meeting 14

13 -Jan-2015 FCC dump, FHI meeting SSC like • Kicker still around quad • Septum is part of the bump • Region with better field quality used for circulating beam • 2. 0 mrad, 334 T. m • Half of the central drift (~200) needed to reach beam separation at MSD entrance • With 100 m of MSD not anymore NC • Bumpers: • 0. 5 mrad, 84 T. m 16

13 -Jan-2015 FCC dump, FHI meeting SSC like - opening up central drift • Without significantly increasing the max betas reach 500 m central drift • With 100 m each side for bumpers and auxiliaries leave 300 m for septum • 334 T. m, 1. 2 T again NC • Bumpers: • 0. 5 0. 35 mrad, 60 T. m 17

13 -Jan-2015 FCC dump, FHI meeting 18 Conclusions - Injection • 100 m require ~6 T septa • If standard half cell length of 100 m can be opened to 125 m, NC septa become thinkable • Open length of halfcell from 100 m to 150 m to relax magnet strengths

13 -Jan-2015 FCC dump, FHI meeting 19 Conclusions - Dump • Assume dumps for the two beams in separated straights (not as in LHC) • Extraction with kicker and septum around quad supported by bump • 1. 4 T for MSD NC possible • Combination of NC + SC septum • increase beam separation with thin NC septum • increase clearance at downstream QF 4 with ~4 T SC septum • shorten drift smaller betas higher acceptance • Bumpers with 50 T. m take into account space • SSC like extraction • Septum part of the bump easier for field homogeneity • If central drift is opened up to 500 m (betamax ~1100 m) MSD can be NC with ~1. 2 T • Bumpers with 60 T. m • Keep some half cells around dump systems – partly needed for protection devices, partly usable for other systems