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PU Choices for ADT Plans for Run 2

This document outlines the plans for the Advanced Data Transport (ADT) system for Run 2, discussing the selection of pickup types and the implementation of new optics as presented by the team of W. Hofle, G. Kotzian, and D. Valuch. The plan includes coupling changes, cable extensions, and expected improvements in signal strength and kick strength. Key aspects covered are the choice of BPMC-type couplers, the geographical layout for cabling, and the collaboration between BI and ADT systems.

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PU Choices for ADT Plans for Run 2

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

  2. W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC 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 Overview for one damper (ADT) Run 1: 2 PU / beam / plane Post LS1: 2 additional PU / beam / plane • 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

  4. W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC Pickups for ADT after LS1 as presented at LMC: 5th Feb 2014 v.6.503 All PUs are couplers (BPMC type) that already exist, high beta preferable

  5. W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC Pickups for ADT after LS1 New proposal with new optics use four Q8 PU All PUs are couplers (BPMC type) that already exist, high beta preferable

  6. W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC Implementation of the new proposal • 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) • 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; b-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  BI BPMC.8L4.B1 V  ADT • BPMC.8L4.B2 H  ADT BPMC.8L4.B2 V  BI • BPMC.7L4.B1 H  ADT BPMC.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  BI BPMC.8R4.B2 V  ADT

  7. W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC Estimated improvements for ADT (1) 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 • S/N for pick-ups (reference: 1 pick-up @ b =100 m)

  8. W. Hofle / G. Kotzian / D. Valuch PU Choices for ADT - Plan for Run 2 14 April 2014 - LBOC Estimated improvements for ADT (2) • Kickers: improvement proportional to b1/2 • design peak kick strength 7.5 kV is 2 mrad (450 GeV/c); assumed b=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 b’s much higher than 100 m) • cf. to run 1 optics, the new optics brings further improvement for all beams and planes

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

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