1. Status Report on the Muon System Alessandro Cardini / INFN Cagliari (with the help of the whole Muon Group)

2. Summary Status of the muon system Performance of the muon system in 2015 Spare MWPCs spare production The new readout and control electronics Becoming more eco-friendly: the new GEM Gas Recirculation system Update on M2 shielding Updated milestones Summary of muon system performances @HL Conclusions and next steps Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari2

3. Muon Detector Status Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari3

4. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari4 W. Baldini

5. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari5 W. Baldini

6. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari6 W. Baldini

7. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari7 W. Baldini

8. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari8 P. de Simone

9. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari9 P. de Simone

10. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari10 W. Baldini

11. On L0 Muon trigger Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari11 M. Fiore

12. Muon Detector Upgrade Status Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari12

13. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari13 M. Palutan

14. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari14 M. Palutan

15. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari15 M. Palutan

16. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari16 M. Palutan

17. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari17 and nSYNC S. Cadeddu P. Ciambrone

18. The nSYNC TDC Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari18 S. Cadeddu TDC ASIC submitted in February, received in July, now under test

19. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari19 S. Cadeddu L. Casu

20. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari20 S. Cadeddu L. Casu

21. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari21 S. Cadeddu L. Casu All these are preliminary results If performances are confirmed, the TDC can be used AS IT IS inside the nSYNC LHCb operating point

22. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari22 V. Bocci

23. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari23 V. Bocci P. Fresch

24. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari24 P. Fresch

25. A new GEM Gas Recirculation System Motivations: costs and going green Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari25 B. Mandelli R. Guida A. Cardini B. Schmidt

26. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari26 Very expensive, more than 180kCHF Should cost about 130kCHF, same cost as that of the gas we would use anyhow in open-loop operations – and CERN Gas Group is willing to put ~40kCHF on it B. Mandelli R. Guida

27. New GEM Recirculation System Summary Many interactions with the CERN Gas Group people (Beatrice Mandelli and Roberto Guida) and Rolf and Carmelo  decision taken, we go for it CERN is pushing a lot to reduce the use of gases with a large Global Warming Potential (GWP), LHCb will do its part too The full system cost is comparable to that of CF4 only for open- loop mode operations in the next 3 years, and the CERN Gas Group will put in addition ~40kCHF on it It will be the first LHC GEM detector operating in closed loop  very useful information, in particular for CMS Installation at the end 2015/beginning 2016 Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari27

28. Update on M2 shielding studies Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari28 R. Paluch B. Schmidt

29. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari29 R. Paluch B. Schmidt

30. Updated Muon Upgrade Milestones Email sent to Upgrade Coordinator (GP) on Friday September 11 th : 1) Nov-15: EDR for nSYNC, nODE, nSB, nPDM (+4 months) 2) Feb-16: nSYNC proto submission (+6 months) 3) Nov-16: full r/o and control chain test stand (+4 months) 4) Mar-17: PRR before starting production (+2 months) Motivations: doubts on the IC technology to be used: reduced support by CERN on standard IC libraries on TSMC 130nm in the transition period between IBM and TSMC. Finally decided to go with UMC 130nm were we have direct experience thanks to other ongoing projects at our institutes. 5) Apr-16: EDR additional shielding (+6 months) 6) Aug-16: PRR Additional shielding - launch order (+6 months) Motivations: baseline design done: up to -65% reduction in M2R1 rates. Still studying if also replacing M2R1 with a passive additional shielding would be the optimal solution for the muon system performance at high-luminosity - work in progress. Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari30

31. On muon system performances / 1 In June we have shown that an improved muon identification algorithm (isMuonTight+BDT) restores the average pion misidentification increase with pile-up, at least up to 2E+33 Still, the inefficiency due to dead time depends on the particle rate in every region/station –Giacomo used the data taken at 13 TeV to check the rate extrapolation in the PID Upgrade TDR  conservative assumptions –M2-M5 tracking inefficiency: 6.8%  3.9% by reducing DIALOG formation time –Could we still improve the situation in most illuminated regions if we switch to a PAD readout? YES (from the point of view of the dead time) but APPARENTLY there is NO GAIN from the point of view of muon performances This is surprising: why an improved M2(R1) does not improve the muon identification performances? What is the role of M2(R1) in this? Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari31

32. On muon system performances / 2 Tested muon identification procedures without M2(R1) Preliminary: pion misidentification (but only using isMuonTight) at a luminosity of 1E+33 increases by ~20% if M2R1 information is not used –What happens with the full muon identification algorithm? –What happens at 2E+33? And if we further increase the luminosity, up to 1E+34? –Could it be beneficial to remove M2R1 detectors and extending the new shielding also in the M2R1 volume? All this is currently under study, first results will be presented at the Brainstorming Upgrade meeting in Cagliari on October 8 th + 9 th Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari32

33. Next steps in the upgrade The muon upgrade is “just” the new 40 MHz R/O, but with the new muon identification algorithms this seem enough for 2E+33 Some improvement on the deadtime @HL could come from a replacement of IB with nODE in some regions - we are purchasing extra components to allow this New pad-based detectors in M2 most-irradiated regions: –Could improve to some extent the global deadtime @HL –It would be a HUGE construction effort, time is short and human resources are limited –Also, what happens @VHL? Would these detectors be what we really need in these extreme conditions? We cannot afford building new detectors twice! –Is an extra shielding in place of M2R1 a better solution in the long run? We are currently working to get an answer to all these questions Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari33

34. Conclusions Very good performances of the muon system in 2015 A lot of work to improve performances and system monitoring/control Spare MWPCs production at LNF is progressing well, and PNPI site should start production early next year Important progress on upgrade electronics: nSYNC TDC is under test and appears to work as expected; protocol translator to interface GBT-SCA with our FEE simulated, soon to be tested in lab Muon system performances, using new algorithms and current detector, appears to be enough for L=2E+33, and in addition dead-time could be improved with minimal effort Finally, we are studying further improvements that could open the door for operating the muon system close to 1E+34 Meeting con i referee, 21/9/2015A. Cardini / INFN Cagliari34