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Triplet layout parameters for 150mm 140T/m quadrupoles R. De Maria, S. Fartoukh (ABP-LCU)

Triplet layout parameters for 150mm 140T/m quadrupoles R. De Maria, S. Fartoukh (ABP-LCU) 26/07/2012. Introduction. A triplet layout is optically defined by the positions, (mag.) length and strengths of quadrupoles.

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Triplet layout parameters for 150mm 140T/m quadrupoles R. De Maria, S. Fartoukh (ABP-LCU)

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  1. Triplet layout parameters for 150mm 140T/m quadrupoles R. De Maria, S. Fartoukh (ABP-LCU) 26/07/2012

  2. Introduction A triplet layout is optically defined by the positions, (mag.) length and strengths of quadrupoles. These specifications depend on the drift lengths needed to host the coil ends, interconnections, length of the correctors (dipole, skew quads, non linear...) With respect to the last HL-LHC baseline layout (SLHCV3.1b), we have: • New apertures (150mm instead of 140mm) • New gradient (140T/m instead of 150T/m) • Q1-Q3 split in two halves • No new information on interconnect and corrector lengths w.r.t to PhaseI project. Today we can only • rescale with strength and aperture the last layout, which in turn has been based on the PhaseI project estimates • Even if these estimates were correct, still not final are: • the type and strength of the non linear correctors • the BPM locations

  3. Tentative layout

  4. Variations No splitting 150T/m 140mm l.q1/3 = 7.685 ; l.q2a/b = 6.577 ; dq1q2a = 3.56 ; dq2aq2b = 1.915 ; dq2bq3 = 3.56 ; totlen = 60.559 ; Beta* gain if 150mm: 14%; No splitting 140T/m 150mm l.q1/3 = 8.04 ; l.q2a/b = 6.826 ; dq1q2a = 3.81 ; dq2aq2b = 2.05 ; dq2bq3 = 3.81 ; totlen = 62.402 ; Beta* gain = 9.2% Splitting Q1/3 140T/m 150mm l.q1/3 = 8.485 ; (2 l + lqq) l.q2a/b = 6.772 ; dq1q2a = 3.81 ; dq2aq2b = 2.05 ; dq2bq3 = 3.81 ; lqq = 0.5 ; totlen = 63.184 ; Beta* gain = 6.8% ; No splitting 135T/m 150mm l.q1/3 = 8.285 ; l.q2a/b = 7.006 ; dq1q2a = 3.81 ; dq2aq2b = 2.05 ; dq2bq3 = 3.81 ; totlen = 63.252 ; Beta* gain = 6.7%

  5. Interconnect lengths for 150mm aperture (Just guesses, please contribute!) • Between cryostats: 90cm • Inside cryostats, between magnets or cryo lengths: • Quads: 57.5cm • Dipole corr.: 45cm • Dipole to a2 corr. (not scaled): 49.5cm • a2 to b3 b6 corr. (not scaled): 39cm • Other corr. (not scaled): 35cm

  6. Backup Nominal LHC MQXA.1R1 0.507 MCBXH.1R1 MCBXV.1R1 1.687 BPMS.2R1.B1 0.521 MQXB.A2R1 0.469 MCBXH.2R1 MCBXV.2R1 0.531 MQXB.B2R1 0.692 TASB.3R1 0.5545 MQSX.3R1 0.2455 MQXA.3R1 0.479 MCBXH.3R1 MCBXV.3R1 MCSX.3R1 MCTX.3R1 0.483 MCOSX.3R1 MCOX.3R1 MCSSX.3R1 0.585

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