Stato di LHCb. P. Campana CSN1 14 maggio Il Trigger L0 dei Calorimetri Il sistema dei RICH Il sistema a Muoni

Transcription

1 Stato di LHCb P. Campana CSN1 14 maggio 2007 Il Trigger L0 dei Calorimetri Il sistema dei RICH Il sistema a Muoni 1

2 Stato del Trigger L0 dei Calorimetri U.Marconi Schede di trasmissione su fibra ottica Schede a canale singolo (~50): Prodotte, collaudate e distribuite. Utilizzate dal PreShower/SPD detector e dalle board di selezione. Schede a 8 canali (~100): Prodotte, collaudate e distribuite. Utilizzate per DAQ e L0 trigger Fibre ottiche per la connessione della DAQ e del Trigger acquistate e installate. 2

3 Istallazione e collaudo 3

4 Istallazione e collaudo ECS Ethernet Switch Optical Patch Panels 4

5 Primo evento LED pulse selezionato dal Trigger 5

6 Monitoraggio e configurazione 6

7 Stato del RICH C.Matteuzzi Milestone achievements All HPD delivered RICH-2 completed all HPDs installed Level-0 boards (242) all delivered to CERN. The carbon-fibre mirrors have been coated (SESO) 7

8 The RICH-1 Mechanics & Optics Status Report 8 1

9 CMA Spherical Mirrors Front view (photo taken at CMA) Back view (photo taken at CMA) Fluorocarbon testing continuing: CMA samples 9 months in C4F10, no changes observed. 9 3

10 CMA Spherical Mirrors Specs: D0<2.5mm and R=2700(+/-1%)mm D0 and R measured at CERN, all 4 mirrors within specs. Mirror number D0(mm) R(mm) # # # # Image of point source at CoC: Diameter (95% of light) ~ 0.5mm Compare HPD pixel size = 2.5mm Optics stand: front view of mirror 10

11 On behalf of Fabio Metlica Coatings at SESO 4 CMA mirrors coated at SESO (Aix-en-Provence, France) in Feb07. CMA standard coating is SiO, but Al+MgF2 coating needed for good reflectivity in UV range Both CMA and SESO coated samples with Al+MgF2: CERN CF Mirrors sample reflectivity curves for the 4 CMA mirrors coated at SESO R (%) sc352 N 4 sc354 N 2 sc355 N 3 sc356 N W.L. (nm) 11 7

12 Gas Enclosure Completed Installed and aligned Survey completed Seal-to-VELO installed Beam-pipe installed Exit window and seal installed Beam-pipe aligned Exit window sealed to beam-pipe Quartz windows delivered Quartz windows coated (T=96%) Leak testing Leak of ~100 litres an hour!!! Leak of less than 1 litre an hour at 4mbar overpressure To Do Fit quartz windows (part of the photon funnel) 12

13 Gas Enclosure is nearly complete and has been leak tested Column dressing is underway: Top half completed Bottom by start June 2007 HPD and Optics Installation tooling underway: Optical alignment complete Spherical mirror boxes complete Manufacture of flat mirror boxes underway Order for HPD installation rails placed (ready end April) 13

14 The aerogel project 14

15 The aerogel final production AEROGEL Clarity factor Contract specification: C< µm 4 /cm AEROGEL refractive index Contract specification: < n <

16 Aerogel Radiator 16

17 Aerogel Radiator Natural Ageing test in corso da ~3.5 anni monitoraggio di n e C C/C = 4.2% per anno n costante Compatibilita' con C4F10 test in corso da ~2.3 anni monitoraggio di C rigenerazione con N2 possibile 17

18 The aerogel project All tiles sealed waiting the final assembly At the moment of assembly it will be measured: trasmission ( Clarity coefficient) index of refraction n n variation across the tile (the laser method) Planned : june 2007 Expected length: about 3 weeks The two boxes will then be stored under N 2 waiting for the mounting august

19 The HPD project 19

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22 contract spec. typical 23.3 % 22

23 HV: all 272 boards tested and installed Milano responsabilities - Status LV: all 144 boards tested and installed Magnetic shield and Kapton surrounding HPDs. All 550 assemblies tested. Installation in parallel with HPDs Protection: all 32 boards tested and installed 23

24 Stato del rivelatore Mu G. Carboni 24

25 At CERN in Bdg. 156 Pre-installation Test Upon delivery at CERN all chambers are retested for gas leakage and dark current faults fixed After FEE noise check (all channels) turn HV on with final gas mixture 2 bigaps in coincidence (CARDIAC AND/OR feature) record cosmic rays counting vs. HV up to 2800 V Count (Hz/m 2 ) Cosmic muons (horizont): Bigap(1+2) at 2450V, Bigap(3+4)=scan M3R4 (TH=15fC) HV (V) 300V M5R1 (TH=6fC) If If OK OK delivery delivery to to Point Point 8 3 test stations INFN CERN PNPI All equipped by INFN All equipped by INFN 25

26 Installation Complex system almost 1400 independent chambers 120k FEE channels lot of cables parallel gas distribution lot of pipes aligmnent with O(mm) precision Manpower Tight space 26

27 Fixing chambers on the inner edge of wall requires expert alpinists M5R1 27

28 A side M2-M5 installation overview C side DATE 4 MAY /138 chambers installed 113/138 chambers installed All chambers inst/comm/aligned All chambers inst/comm/aligned All chambers installed/comm/50% aligned All chambers installed Services Gas & cables completed Cables completed Cabling in progress Not yet started All All chambers in in commissioning phase gas leaks FFE cables HV 28

29 Chamber Installation schedule DATE 27 APR 2007 M2-M5: we are basically on January schedule Services of M2-M5 basically completed by June/July M2-M5 Chamber installation completed by August Debugging (electronics) completed by October M1 installation (mechanics) should start in June M1 services to be installed in July until October It is not clear the machine schedule (sector test in IP8) 29

30 Electronics Installation LV cabling completed in Racks of M4-M5 (both sides) plus M2-M3 on side C Started installation of TB (Transition Boards) until May SB/IB/ODE installation April July Cable chains May-June, then global commissioning can start HV system: now using few CAEN Easy modules install PNPI system April June then Easy according to deliveries 90% of ODE delivered and tested, ready to start installation Plan to build a few of extra SB 30

31 CARDIAC CARDIAC burn-in procedure took longer than expected Necessity to install extra shielding on boards (stability!) Relatively large number of rejects (negative in particular) Extra production of 1000 now launched Produced Pos Neg GEM Burn-in Shipped Needed w/o M1 Needed with M } Diff. due mostly to shipping delay 31

32 HV System Delivered 10 A3535P HV modules delivered We will have enough for M2-M5 by summer, more by November (100% 02/08) PNPI system: expect fully delivery by June 32

33 Final PRR May 2006 M1R1 3-GEM 12 3-GEM double-chamber production finished in Cagliari and LNF Spares production ended on December 06 Electronics (LV, HV, FEE) in production Dressing the chambers with FC, FEE in in progress Ready for installation in April (wait for M1 infrastructure) 33

34 M1 station 34

35 M1 station 35

36 CONCLUSIONS The installation of the Muon System is advancing well, despite some difficulties at startup. We had to learn by doing how to install a very complex system The present estimates for the schedule are based on experience. We are confident that all M2-M5 will be installed and commissioned in time for the pilot run Much effort is still required to have also M1 in the game for the pilot run (for the physics run in 2008) 36