1. G.Alexeev for Dubna group ITEP, April 28, 2010 Muon System Status Report from Dubna Hardware : * Full Scale prototype - in preparation to be put in work position at COMPASS, expected start of long strips r/o studies – May-June 2010 * Range System prototype (degree of readiness) : - steel absorber /structure ~ 95% (Fe plates 100% ready -> to be welded) - MDT detectors ~ 50 % (all parts 100% ready, 10% of MDTs assembled) - strip boards, cables ~ few % (to be produced by summer 2010) - f/e electronics ~ few % (design 100% ready, mass production required) ( see report of A.Piskun) Software : * Acceptance studies for DY and J/  muon pairs (see report of V.Rodionov) G. Alexeev ITEP 2010

2. Full Scale prototype mechanically assembled and stored in COMPASS area (park position) It is now being equipped with HV,LV, gas lines, strip boards, f/e electronics and tested before the start of COMPASS run G. Alexeev ITEP 2010

3. RS prototype assembly finished ( 60mm plates – black, 30mm plates – blue ) G. Alexeev ITEP 2010

4. Wiring machine for MDT detectors G. Alexeev ITEP 2010

5. Assembled MDTs (in black envelops) and profiles prepared for wiring G. Alexeev ITEP 2010

6. All MDTs ready – 312 units (288 for RSProto + 24 spare) G. Alexeev

7. G10 fiberglass strip board (1cm wide strips) at CERN/COMPASS G. Alexeev ITEP 2010

8. Strip board (2 m long Y-strips) mounted onto FS Prototype at CERN G. Alexeev

9. Strip board (4 m long X-strips) mounted onto FS Prototype at CERN G. Alexeev

10. FS Prototype under the crane at COMPASS area – test maneuver before suspension at work position (behind muon filter) G. Alexeev

11. VME crate 6U STRIP R/O digital WIRE R/O analog & digital RW-TDC QTC–16 ASum-96 ADB-32 (A-32) A2DB-32 analog digital COMPASS CATCH DAQ VME crate 9U MWDB units Hot link cables Range System Prototype Readout Scheme to DAQ crate A. Piskun ITEP 2010

12. Digital R/O Block DiagramA-32 Strip R/O ADB-32MWDB STRIP SIGNALS (2304 channels) CATCH MWDB WIRE SIGNALS (2304 channels) CATCH Wire R/O Preamplifier Board (72) Amplifier-Discriminator Board (72) Muon Wall Digital Board (24 total) 1 unit Double Amplifier-Discriminator Board (72) (Digital output) A2DB-32 A. Piskun ITEP 2010

13. Analog (wire) R/O Block Diagram WIRE SIGNALS (2304 channels / 96 per layer) ASum-96 A2DB-32 A2DB-32 A2DB-32 3 boards per layer 1 board per layer 24 total QTC-16 Charge-to-Time Converter 2 boards total RW-TDC CATCH Analog output A. Piskun ITEP 2010

14. Double Amplifier-Discriminator Board (A2DB-32) 2 modes of amplification: K1= 65 mV/uA K2=420 mV/uA Designed both for wire and strip R/O Analog and 2 digital (ECL, LVDS) outputs Low noise: I noise r.m.s = 38nA Low cross talk < -45 dB Status: “table-top” tested, ready for production (80 with spares) A. Piskun ITEP 2010

15. Long strips ( 1 cm wide ) connected to universal r/o card ( A2DB-32 ) A. Piskun ITEP 2010

16. Front-end Electronics for Strip R/O 32-channel preamplifier board A-32 v.3; prototype manufactured and tested; ready for production (80 with spares) 32-channel amplifier- discriminator board ADB-32; tested in D0/FNAL and COMPASS/CERN (MW1); ready for production (80 with spares) A. Piskun ITEP 2010

17. Analog Summator Board (ASum-96) Status: designed and being manufactured, need to produce 30 (with spares) A. Piskun ITEP 2010

18. Analog summation card ( ASum-96 ) assembled and tested A. Piskun

19. Charge –to-Time Converter (QTC-16) Status: “table-top” tested, 2 boards manufactured, 1 spare needed A. Piskun ITEP 2010

20. Muon Wall Digital Board (MWDB) Status: tested in COMPASS (MW1), 5 ready, need to produce 21(with spares) 192-channel register based on 6 F1 chips A. Piskun ITEP 2010

21. Status of Units: A2DB-32 “Table-top” tested, 72 boards needed, to produce 80 (with spares) A-32 “Table-top” tested, 72 boards needed, to produce 80 (with spares) ADB-32 Tested in D0/FNAL and COMPASS/CERN (MW1), 72 boards needed, to produce 80 (with spares) ASum-96 Designed and being manufactured, needs final test, to produce 30 (with spares) QTC-16 “Table-top” tested, 2 boards produced, to produce 1 spare RW-TDC Tested in COMPASS/CERN (RW), need to borrow 2 units (from Rich Wall) MWDB Tested in COMPASS/CERN (MW1), 24 needed, 5 boards produced, need to produce 21 (with spares) CATCH Need to borrow 2 units (from COMPASS) A. Piskun ITEP 2010

22. Outlook: - Muon system in PandaRoot - MC: DY (  -,  + ) registration efficiency by muon system as function of polar angle of DY effective photon: -- muon detectors only: with/without magnetic field -- full PANDA setup(material): with/without magnetic field -- how to improve acceptance - MC: J/  (  -,  + ) registration efficiency by muon system as function of polar angle of J/  Muon simulation status from Dubna Valery Rodionov ITEP, April 28, 2010. V. Rodionov ITEP 2010

23. PANDA setup in PandaRoot Muon system in PANDA TS/barrel: 12 layers of MDT inside the yoke + “zero” bi-layer. TS/endcap: 5 layers MuonFilter: 4 x (60mm/Fe + MDT) “zero” bi-layer+16 x(60mm/Fe +MDT) FS: “zero” bi-layer+16 x(60mm/Fe +MDT) V. Rodionov ITEP 2010

24. Geometrical acceptance of muon system in case of: muon detectors only (without Solenoid and Yoke). Pythia as event generator (40K DY events) + PandaRoot. Option: with/without magnetic field in Solenoid/Dipole. PANDA muon system. For demonstration the geometrical acceptance of muon system, the simulated 50 DY events are presented on the same figure. V. Rodionov ITEP 2010

25. Polar angle distribution of DY photons. Geometrical acceptance study of muon system in case of: full PANDA setup (material). Pythia as event generator (40K DY events) + PandaRoot. Option: with/without magnetic field in Solenoid/Dipole. V. Rodionov 65%Forward region 5%“beam pipe” 30%Stopping in Dipole/Ecal(Forward) The relative loses for DY events in muon system Finally: ~12% losses of DY events with selection criterion: no hits in muon system for at least one muon from DY (  -,  + ). ITEP 2010

26. Polar angle distribution of J/ . Geometrical acceptance study of muon system in case of: full PANDA setup (material). Pythia as event generator (37K J/  (  -,  + events) + PandaRoot. Option: with/without magnetic field in Solenoid/Dipole. V. Rodionov ITEP 2010

27. Conclusion: 1)The MC (PandaRoot) study of DY(  -,  + ) and J/  (  -,  + ) registration efficiency by muon system was started 2)In current muon system design: a) the acceptance for DY pairs may be increased to ~ 88% by introducing minor changes in MDT layers design in Endcap  this is a point for further studies/discussions b) the acceptance for J/  looks better and less sensitive to magnetic field as compared to DY 3) In order to get more detailed results, we need the higher statistical samples (at least 1M events for each process  DY, J/  and D-mesons) 1)The MC (PandaRoot) study of DY(  -,  + ) and J/  (  -,  + ) registration efficiency by muon system was started 2)In current muon system design: a) the acceptance for DY pairs may be increased to ~ 88% by introducing minor changes in MDT layers design in Endcap  this is a point for further studies/discussions b) the acceptance for J/  looks better and less sensitive to magnetic field as compared to DY 3) In order to get more detailed results, we need the higher statistical samples (at least 1M events for each process  DY, J/  and D-mesons) V. Rodionov ITEP 2010