1. PU Choices for ADT Plans for Run 2 ADT Team W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC 1

2. 2 Overview of ADT System (run 1)

3. W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC 3 Overview for one damper (ADT) Requirements for PU: coupler type pick-ups (BPMC)  choice of Q7, Q8, Q9, Q10 (as PUs available) dedicated to ADT high beta function (> 100 m) low dispersion an advantage must be in IR4, cabling to surface as short as possible Run 1: 2 PU / beam / plane Post LS1: 2 additional PU / beam / plane

4. W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC 4 Pickups for ADT after LS1 as presented at LMC: 5 th Feb 2014 B1 horizontal Q10LQ9LQ7LQ7RQ9RQ10R  = 28 m  = 127 m  = 112 m  = 78 m  = 16 m  = 158 m existing new B1 vertical Q10LQ9LQ7LQ7RQ9RQ10R  = 172 m  = 25 m  = 52 m  = 127 m  = 138 m  = 38 m new existing B2 horizontal Q10LQ9LQ7LQ7RQ9RQ10R  = 164 m  = 17 m  = 60 m  = 173 m  = 106 m  = 30 m new existing B2 vertical Q10LQ9LQ7LQ7RQ9RQ10R  = 36 m  = 140 m  = 169 m  = 23 m  = 34 m  = 181 m existing new All PUs are couplers (BPMC type) that already exist, high beta preferable v.6.503

5. W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC 5 Pickups for ADT after LS1 New proposal with new optics  use four Q8 PU B1 horizontal Q10LQ9LQ7LQ8RQ9RQ10R  = 32 m  = 111 m  = 106 m  = 133 m  = 19 m  = 153 m existing new B1 vertical Q10LQ9LQ8LQ7RQ9RQ10R  = 175 m  = 54 m  = 155 m  = 161 m  = 142 m  = 46 m new existing B2 horizontal Q10LQ9LQ8LQ7RQ9RQ10R  = 158 m  = 22 m  = 96 m  = 150 m  = 101 m  = 29 m new existing B2 vertical Q10LQ9LQ7LQ8RQ9RQ10R  = 44 m  = 160 m  = 167 m  = 151 m  = 56 m  = 180 m existing new All PUs are couplers (BPMC type) that already exist, high beta preferable

6. Implementation of the new proposal o ADT: extension of 4 pairs of cables from Q7 to Q8’s Four cables on each side of IR4 to be pulled (each 55 m, 7/8”) space available on cable trays (inspection done, M. Gasior, D. Valuch) o Proposal to swap between BI and ADT (Q8 vs Q7) Four cables 3/8” on each side of IR4 (each 55 m) to be pulled and spliced to existing cables that end at Q8’s BPMC.8R4, both beams, all planes were used for beam presence flag (BPF)  half of signals for this will now come from the Q7’s;  -functions not relevant for BPF BPMC.8L4 were used for developments by BI, can cope with a swap Overall proposal means (changes in red) BPMC.8L4.B1 H  BIBPMC.8L4.B1 V  ADT BPMC.8L4.B2 H  ADTBPMC.8L4.B2 V  BI BPMC.7L4.B1 H  ADTBPMC.7L4.B1 V  BI BPMC.7L4.B2 H  BIBPMC.7L4.B2 V  ADT BPMC.7R4.B1 H  BIBPMC.7R4.B1 V  ADT BPMC.7R4.B2 H  ADTBPMC.7R4.B2 V  BI BPMC.8R4.B1 H  ADTBPMC.8R4.B1 V  BI BPMC.8R4.B2 H  BIBPMC.8R4.B2 V  ADT W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC 6

7. Estimated improvements for ADT (1) o S/N for pick-ups (reference: 1 pick-up @  =100 m) W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC 7 Run 1 (2 PU) Q7,Q9 Run 2 (4 PU) Q7,Q9,Q10 Run 2 (4 PU) Q7,Q8,Q9,Q10 Improvement with BI swap H.B13.8 dB5.6 dB7.0 dB1.4 dB V.B14.2 dB7.4 dB8.0 dB0.6 dB H.B24.4 dB5.9 dB8.0 dB2.1 dB V.B24.9 dB6.6 dB8.2 dB1.6 dB average improvement with BI/ADT swap: 1.4 dB (17 %) “un-natural Q7”: 4R.B1.H: 23 m 4L.B1.V: 86 m 4L.B2.H: 23 m 4R.B2.V: 15 m

8. Estimated improvements for ADT (2) W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC 8 Damper Run 1:  Run 2:  Improvement factor H.B1 (L4)253 m271 m1.04 V.B1 (R4160 m268 m1.29 H.B2 (R4)204 m263 m1.14 V.B2 (L4)306 m336 m1.05 o Kickers: improvement proportional to  1/2 design peak kick strength 7.5 kV is 2  rad (450 GeV/c); assumed  =100 m cf. design impact on beam is factor 1.6 higher for H.B1, V.B1, H.B2, and 1.8 higher for V.B2 (because  ’s much higher than 100 m) cf. to run 1 optics, the new optics brings further improvement for all beams and planes

9. Conclusion W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC 9 For ADT: new optics + swap of four Q7/Q8 PU planes ADT  BI  improvement for pick-up signals (signal-to-noise)  improvement of maximum kick strength requires additional cabling between Q7 and Q8 8x55 m 7/8” cables to be pulled in tunnel for ADT 8x55 m 3/8” cables to be pulled in tunnel for BI