WP3 meeting Aug 21, 2015 V1.1 RECAP Francesco Cerutti

HL-LHC V1.1 IR5/IR1 for the D2-Q4 region see L.S. Esposito’s talk at the 2014 Annual Meeting at KEK http://indico.cern.ch/event/326148/session/17/contribution/43 for the triplet-D1 region see F. Cerutti’s talk at the 2014 Annual Meeting at KEK http://indico.cern.ch/event/326148/session/17/contribution/42 F. Cerutti Aug 21, 2015 WP3 meeting

WARNING: V1.1 → V1.2 the design of the tungsten equipped beam screen and the interconnects plays a major role with respect to the radiation impact over the triplet-D1 string. Their evolution is potentially worsening the anticipated picture (longer shielding gap in the ICs!) TAXS tentatively back to 60mm aperture (it was 54mm), no major effect expected concerning the impact on matching section magnets TAXN twin bores from 80mm to 85mm! D2-Q4 corrector aperture: from 100mm (previously guessed) to 105mm (as the D2) 80-85mm option for the Q4 (still 90mm baseline) dependence on crossing plane naturally complicates things implying various worst scenarios F. Cerutti Aug 21, 2015 WP3 meeting

D2-Q4 MAGNET MODELS (V1.1) F. Cerutti Aug 21, 2015 WP3 meeting

F. Cerutti Aug 21, 2015 WP3 meeting D2 D2’s C1 TCLX.4 at 12 σ total power [W] 42 5 3 8 11 10 C1 100 90 D2 105 coil aperture [mm] C2 Q4 D2 F. Cerutti Aug 21, 2015 WP3 meeting

FIRST D2 NON-IP SIDE CORRECTOR (C1) IR5 (295 urad horizontal) external bore (B1) IR1 (295 urad vertical) internal bore (B2) [MGy after 4 ab-1] [MGy after 4 ab-1] protected by TCLX.4 here no protection in reality TCT.4 (for other purposes) F. Cerutti Aug 21, 2015 WP3 meeting

TRIPLET-D1 50cm shielding gap in the ICs F. Cerutti Aug 21, 2015 WP3 meeting

TOTAL POWER @ 7.5 L0 HL-LHCV1.1 Power [W] Magnet cold mass Beam screen Q1A + Q1B 140 210 Q2A + corr 150 90 Q2B + corr 165 100 Q3A + Q3B 220 105 CP D1 135 80 Interconnects 30 110 Total 945 780 F. Cerutti Aug 21, 2015 WP3 meeting

PLANNED FOR THE OCTOBER ANNUAL MEETING NEW REVALUATION PLANNED FOR THE OCTOBER ANNUAL MEETING F. Cerutti Aug 21, 2015 WP3 meeting