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2011NA62 Status Report to the CERN SPSC

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  1. 2011NA62 Status Report to the CERN SPSC Augusto Ceccucci for the NA62 Collaboration April 5, 2011 CERN-SPSC-2011-015 (SPSC-SR-083) NA62@SPSC101

  2. The NA62 Collaboration • Birmingham • Bristol • Glasgow • Liverpool • Bratislava • IHEP • INR • JINR • Sofia • Mainz • UC Louvain TRIUMF • CERN • George Mason • SLAC • UC Merced • Ferrara • Florence • LNF • Naples • Perugia • Pisa • Rome I • Rome II • Turin • San Luis Potosi NA62@SPSC101

  3. Flavour Physics Overview • LHCb has shown similar sensitivity as CDF/D0 with just 1% of the integrated Luminosity accumulated at the Tevatron • The MEG experiment at PSI is searching for the forbidden decay m+→ e+g • Rare Kaon decays to be studied at CERN-SPS (NA62) and J-PARK (KOTO) • There are projects for future e+e-flavour factories (Japan & Italy) • Plans for ProjectX at Fermilab (m2e) • NA62 unique physics goal: Vtd to 8% w/o input from lattice QCD (in 2 years of data taking) • NA62 unique technique: high momentum K+ beam BRSM(K+p+ n n) = (8.22 ± 0.75) × 10-11 NA62@SPSC101

  4. NA62 Beam & Detectors • SPS primary p: 400 GeV/c • Unsepared beam: • 75 GeV/c • 750 MHz • p/K/p (~6% K+) INFN Sofia LAV: Large Angle Photon Veto INFN SAV Small Angle Veto CERN Beam Line + Infra. • IHEP • INR CHOD Charged Hodoscope INFN CHANTI Target UK CEDAR Gigatracker (GTK) LKr MUV • Measure Kaon: • Time • Angles • Momentum CERN Straw Tracker RICH Mainz Decay Region 65m INFN INFN IHEP INR Belgium JINR Mexico CERN Total Length 270m US NA62@SPSC101

  5. Physics & Software (cf. G. Ruggiero and A. Sergi) NA62@SPSC101

  6. Reminder of the Technique ~92% of Kaon decays NA62@SPSC101

  7. K+pnnSelection Skeleton Beamlineregion Chargedparticlerej. (CHANTI) BeamTrack (Gigatracker) Particle ID (CEDAR) Downstream detector region p Track (Straws) Charged particle rej. (RICH, CHOD, Straw) Particle ID (RICH, LKr) mRejection (MUV) gRejection (LKr, LAV, IRC,SAC) Event Kaondefinition Kinematics NA62@SPSC101

  8. Reminder: 2007 estimation Next Slides: Updated estimation (using new software) forp+p0 NA62@SPSC101

  9. NA62@SPSC101

  10. NA62@SPSC101

  11. Kinematics of K+ p+p0 PhotonAcceptanceforp+p0 Photon Energy SAC IRC LKr LAV MISS NA62@SPSC101 • p+p0generated • 105< Zvtx < 165 m • 15 < Pp < 35 GeV • p in detector acceptance

  12. Small Angle Photon Inefficiency g in the IRC-SAC acceptance: Interactions in the material in front of the IRC-SAC. Neon pnnselection: • LKr : no clusters in LKr • (except for thep+ one) • CHOD: Cut on hit multiplicity • RICH: Cut on PMT hit multiplicity • STRAW: Broad cut on multiplicity • SAC-IRC: Deposited energy <40 MeV Beam pipe Energy dependentbecauseofphotonuclearinteractions Notdetectedconversions upstream NA62@SPSC101

  13. Effectof passive material in frontof the LKr(preliminary) • LKr, LAV12, CHOD, IRC/SAC exploitedtodetect the possibleproductsof the photoninteractions • Fractionofphotonslost • LKr + LAV12 + SAV + CHOD: 4 x 10-6 NA62@SPSC101 • Simulation: • All the detectorsswitched on • Selection: • 105< Zvtx < 165 m, 15 < Pp < 35 GeV … • Photons in the LKracceptance

  14. K+ p+p0 Rejectio: AnalysisOptimization p+p0controlregions BG(pp0) BG(pp0) Z of decay vertex Pp , MeV Expected background ~5% NA62@SPSC101

  15. Background from gas interactions Leadingparticle Single atom K,p,p 75 GeV Soft particlemultiplicity • Simulation of the residual gas: O3 (CO2 from straw and H2O from LAV) • Simulation of the interactions: K,p , p with O3 using FLUKA • Tracking of the secondaries in the detectors (fast simulation ) • Parameterization of calorimeter inefficiency vs particle type (LAV) from full simulation • Apply pnn selection and compute the probability of signal-like events forom K, p, p interactions • NBKG/NSIG computed using NSCATTERERS(Vacuum Pressure) for normalization. • Background from p and p depends linearly on the time window coincidence between CEDAR and RICH. NA62@SPSC101

  16. Background from gas interactions NA62@SPSC101

  17. Beam Line & Infrastructure (cf. Lau Gatignon) • The installation of the beam line is foreseen by October 2011 • Ordering has started for most items • The beam line axis has been fixed and traced on the floor in TCC8 and ECN3 • Vacuum layout fully defined (agreed Collaboration with TE-VCS): industrial cryo-pumps is now the baseline solution • Studies of the T10 cooling are under way • The Blue tanks were cleaned with dry CO2 ice • The definition of future ventilation system in ECN3+TCC8 is still under discussion • The beam dump design has been completed • A geotechnical survey has taken place (below -20 m the quality of the rock is poor) NA62@SPSC101

  18. Installation and Schedule cf. Ferdinand Hahn NA62@SPSC101

  19. ECN3 MNP33 NA62@SPSC101

  20. NA62 Schedule(Overview for main items only ) Synchronization Run ??? Technical Run To be decided this week Installation Vessel Nose Prod. Bond. + Ass. Test ASIC Design Read-Out Board Cooling Design Cool. Constr. + Test Cooling Studies LAV 9-11 L 12 LAV 6-8 LAV 1-5 M3-5 M1+2 Install M6-8 Install M9-11 Construction Vessel Install. Beam pipe Install. Constr. Mod. 1 Construction Mod. 3,5+7 Install. MUV 1,2 +3 Tech. Run Construction Note: not all milestones are shown on this planning NA62@SPSC101 Installation Milestones

  21. List of NA62 Milestons (I) NA62@SPSC101

  22. List of NA62 Milestones (II) NA62@SPSC101

  23. Technical Run in 2012 • Following the revised LHC planning (long shut-down in 2013, we have re-optimized our schedule focusing on a technical run in autumn 2012 • In this new context a Synchronization Run in November 2011 no longer seems essential • We will decide whether to abandon it or not at the Plenary Meeting later this week • The following systems are expected for the 2012 Technical Run: • Beam line, Vacuum system & Beam Dump • CEDAR; 3 to 4 Straw Modules, • LAV system (most); RICH vessel, LKr (with existing read-out; IRC & SAC • MUV system • Old CHOD NA62@SPSC101

  24. CEDAR(cf. Evgueni Goudzovski) NA62@SPSC101

  25. CEDAR Plans for the remainder of 2011 • Test beam in October 2011 for the identified NA62 CEDAR (CEDAR-W-01): test the identified CEDAR as it is (old PMTs and readout), practice with the device and alignment • Build and test a prototype of mechanics, covering one optical port, and equip it with a few photo-detectors and prototype readout chain • Test radiation tolerance of the TEL62 and readout chain in a muon beam of similar intensity. Verify front-end electronics radiation tolerance with neutron beam exposure in UK (or Louvain) NA62@SPSC101

  26. Gigatracker(GTK)(cf. F. Marchetto, A. Kluge, M. Fiorini) NA62@SPSC101

  27. GTK: Full-size ASIC Development • The ASIC general system architecture has been defined. • Threshold DACs have been designed and integrated in the modified discriminator in the pixel cell. The full pixel matrix was built up. Presently the global biasing structure using DACs and the distribution network is designed. • The TDC-DLL has been modified to reduce power consumption and re-qualified via simulation. The TDC structure (DLL; fine registers; hit Arbiters) have been placed and routed in the 300 mm column. Post layout verification is underway to qualify that block. • The next steps before submission are the design of the end-of-column standard cell logic, the design of the read-out logic and the integration of these building blocks with the pixel matrix. • In parallel hit separation studies with the laser setup have been conducted to verify the behavior of the demonstrator ASIC with respect to particles arriving in the same pixel within short time periods (hit separation studies). The results confirm the correct behavior of the front-end electronics. Furthermore laser pulses were used to understand the silicon signal development for charge releases on different positions within the pixel cell. For the demonstrator a radiation campaign is planned to verify the total dose effects on the assembly. • In parallel the test infrastructure for the ASIC will be built up. As soon as the ASIC pin assignment is frozen, test cards for the single ASIC will be designed and produced. NA62@SPSC101

  28. Detail of the full GTK ASIC Design Pixel Cell Pixel matrix TDC: delay line, charge pump, encoder, fine hit Registers Hit Arbiter NA62@SPSC101

  29. GTK: Test Beam Analysis • Refined analys confirms a resolution of better than 200 ps per hit for sensor bias voltages higher than 300 V • Time-walk correction and alignment procedures have been validated with real data • Clear dependence of time resolution on sensor bias voltage • The operation at 300 V over-depletion is mandatory • Paper on test-beam results under preparation  NA62@SPSC101

  30. GTK Main progresses since last SPSC meeting (in addition to ASIC design and analysis) • Assemblies: procurement of the dummy sensors and chips (FBK) to study the thinning at IZM • Cooling: • Gas : a) improved the cooling gas path to decrease the temperature non-uniformity of the assembly (measured +/- 5 0C); b) planned a set of test to investigate the mechanical (vibrations) impact of the system. • Micro-channel: a)Si-Si bonded wafers have been tested; b) new design of the channel, which are now in production; c) tests on Si-Pyrex (thinned to 200 mm) assemblies continued. • Mechanical integration: • It has been optimized the integration of the assembly carrier card and mechanical infrastructure hosting the assembly • Off Detector R/O electronics: • Test of some of the critical parts of the GTK-RO design on a development kit based on a Stratix IV: • input transceiver; b) the DDR2 memory; c) Ethernet ports • Drawing of the schematic diagram of the GTK-RO started

  31. Straw Tracker(cf. Hans Danielsson) NA62@SPSC101

  32. Recent progress NA62@SPSC101 Final straw material validation including metallization (Hostaphan RNK2600). The manufacturing of straws in large quantities Validation of the straw manufacturing process and the quality control procedure Design and procurement of the module 0 frame (1/8 of the detector i.e. 896 straws) Start-up of the module 0.

  33. Straw production (SEFAR AG) QC and storage of straws under pressure (1 bar) at CERN NA62@SPSC101

  34. Straw production in Dubna (31-03-2011) NA62@SPSC101

  35. Vacuum test of the structure F = 35 000kg ! • Results: • The measured leak is 0.98mbar*l/min (1.3 times the straws) • Helium leak detection (<10-6 mbar*l/s) was made on all interfaces (beam-to-flange and beam-to-beam) • We need to improve on the temporary seal around the straw holes and add cover at the bottom for the next module NA62@SPSC101

  36. Module assembly Tooling for spacer fabrication Spacer fixation Spacer in tooling Gas manifold with joints NA62@SPSC101

  37. Plans for the remainder of 2011 NA62@SPSC101 From the experience gained with the 64-straw prototype, assemble and test the "module 0", which should full the requirements to be used in the NA62 experiment. This is also a final check of the design and the various components before launching the procurement of the components for the remaining seven modules. Continue cosmic-rays tests of the 64-straw prototype using an independent tracker based on 4 Micromegas modules 1. The aim is to verify the final resolution numbers and to test the FPGA-based TDC read-out (until now we have used the TELL1board). Detector operation will also be tuned. Final beam test with 64-straw prototype and final front-end (with FPGA as TDC on the cover). The previous solution with the TEL62 board is kept as back-up until the new solution is validated. Prepare and start the production of the remaining modules

  38. RICH(cf. Massimo Lenti) NA62@SPSC101

  39. Separate pionsfrommuons <1% levelbetween 15 and 35 GeV/c • Tracktime at 100 ps level • Partecipate in the L0 trigger Mirrors RICH 17 m Beam Pipe • Neon asCherenkovradiator • mosaicofmirrors (17 m focallength) • twospotswith PM (1000 PM per spot) • beam pipe passingthrough PM lodging disk NA62@SPSC101

  40. Vessel (CERN): vacuum proof Gas system simplified: makevacuum, theninject pure Neon NA62@SPSC101

  41. Photomultipliers • 1944 PM available (quality test ongoing) • 1400 HV divider tobeordered (~550 available) PM holding mechanics in fabrication All HV channels alreadyavailable FE electronics in preparation NA62@SPSC101

  42. Photon Vetoes(cf. Antonella Antonelli) NA62@SPSC101

  43. Construction status since November 2010 A3 shipped at CERN beginning of December 2010, some problems during the transport (see later) A4 completed tested and ready to be shipped at cern, we are currently revisiting the transportation procedure A5 arrived at LNF February 18, actually 3 out of 5 layers are mounted and tested, we foresees to complete it by mid April (2 months delay respect to the schedule) NA62@SPSC101

  44. Design and planning A6-A8, A12 A6-A8, A11 Bidding procedure closed adjudicated by Fantini factory, all the drawing have been revisited and the material has been procured. A6 is actually calendared and will be shipped to LNF end of May. We foresees to build an test A6-A8 during 2011 A6-A8 5 layers ∅259 cm A11 4 layers ∅299 cm NA62@SPSC101

  45. Design and planning A9-A10, A12 A6-A8 5 layers ∅259 cm A11 4 layers ∅299 cm • Recall: • A9, A10 have same dimensions as A11, but are made of stainless steel • A12 has open geometry—design is totally different • A9-A10 drawings will be revised in the next months and we will start the bidding procedure, the idea is to start vessels construction by the end of 2011 NA62@SPSC101

  46. Damage to A3 and A2 A3:Due to bad weather conditions (M.Blanc tunnel was closed) the transport took 3 days. Even if all precautions where taken, we insulate the vessel by means of fiberglass cover, the temperature in the vessel reached 5 degrees after 2 days in the snow. 10 blocks were broken during transport! • Fractures are most likely from thermal stress • Likely from re-heating from ~4∘ to 15.5∘ at ECN3 (cooling was much slower) • 9 of 10 blocks on layers most exposed to ambient temperature • We have already started A3 repair work in ECN3 • 6 of 10 blocks repaired Unfortunately A2 experienced a significant temperature gradient: A2 was shipped to CERN end of JULY 1) All the blocks were checked at CERN before the test beam and they were ok 2) The idea was to store all the LAVs in building 185. We were ensured that 185 was air conditioned during summer and heated during winter (including shutdown). A2 was stored in building 185 at the end of August. 4) We went to inspect A2 in February and found 22 blocks broken !! 5) The heating in 185 was switched off without notice during the winter shutdown and never restarted 6) From now on all the LAVs will be stored in ECN3 and an appropriate temperature monitor has been implemented NA62@SPSC101

  47. Data/MC agreement comparing MIP muons and using test beam data MC for Large Angle Vetoes nominal beam Data MC Evts/0.5 pC Integrated charge (pC) NA62@SPSC101

  48. 2011 Future work • construct and test 3 intermediate diameter vessel A6-A8. • half of the frontend electronics will be produced tested. • The mechanics an the relative tools for A9,A10,A12 will be fixed and the bid procedure will be started. • Test the complete chain, final crates final frontend board and final TEL62 A. Antonelli INFN-LNF SPSC meeting CERN 4 April 2011

  49. LKR Calorimeter(cf. Riccardo Fantechi, G. Lamanna) NA62@SPSC101

  50. LKr readout - 1 • Two step approach – First step (2011-2012) • Intermediate solutiontoread the old CPD modules • Installation in 2008 of SLMs (Smart Link Modules) • Test done in 2010 to prove the functionality • Need two items to be able to use them in 2012 • An interface between the new trigger distribution and the legacy NA48 one: the TALK board, see Gianluca Lamanna’s talk • A refurbishment of the old Fastbus power supplies • Following a tender for power supply refurbishment, Wiener has been selected for this job • One prototype ready by ~May • 10 power supplies (with an option for other 10 at the same price) expected by the end of summer • The old mechanics will be reused, with modern modules and controls inside • Complete the software suite to run the calorimeter • Data merging • Readout steering • Planned to be prototyped during the summer NA62@SPSC101