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ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, AGENDA oApproval of agenda and minutes of last meeting oIntegration. L. Leistam (09.10-09.25)

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Presentation on theme: "ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, AGENDA oApproval of agenda and minutes of last meeting oIntegration. L. Leistam (09.10-09.25)"— Presentation transcript:

1 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, AGENDA oApproval of agenda and minutes of last meeting oIntegration. L. Leistam ( ) oFMD design overview. JJG ( ) oSi-FMD Background simul. A. Maievskaia ( ) oSi-FMD FE and RO electronics. B.S.Nielsen ( ) oCoffee break oSi Prototype. A. Angelis/NN( ) oT0 status. V.Grigoriev/ H. Trzaska ( ) oV0 status J.Y.Grossiord/L. Montano( ) oPMD news. Y. Viyogi (?)( ) oSummary-Conclusions-Actions, Formation of TDR writing group. JJG+All ( ) oAOB

2 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Main issues Si-FMD oFreeze inner radius? Freeze general geometry. oIntegration with ITS and other FD oDefine Services (cables, cooling, etc.) oDefine Responsibilities, timetable oGo to bids. Commence Prototyping. T0 oDefine final geometry (L,R) oTrigger oTimetable oGo to prototyping V0 oDesign status oIntegration, trigger oPrototyping. Organization oResponsibilities oTDR writing group formation

3 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Overall Geometry o-5.4<  <-1.6 o 3 <  < 1.6 Si 4 Si3 (moved) Si2Si1

4 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Integration in ALICE Si-1 Si-2 Si-3 V0-R T0-R

5 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Si1 with 6” Wafers 2 Rings Si 1 inner Si 1 outer

6 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Si1 with 6” Wafers R=5.3cm R=17.1cm R=28.8cm R=39.9cm R=35.1cm R=22.1cm Rings Inner Ring Outer Ring

7 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Ring geometry !!30 cm vertex shift:   1.2

8 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Background and acceptance Pseudorapidity coverage oSi1 & Si2 (inner and outer) d(IR)=62.8 and 75.8 cm: 1.51 <|  |< <|  |< 3.58 oSi3: d(IR)345cm <  < oVertex shift (30cm): |d  |  0.3

9 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Background simulations Alla Maevskaia

10 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Background simulations Alla Maevskaia

11 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Background simulations Alla Maevskaia

12 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Background simulations Alla Maevskaia

13 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, RHIC vs. LHC oRHIC (  s=130 AGeV): -5 <  < 5 Plateau: –2 <  < 2 (40% of range) dN/d  (  =0)=550. (  s=200 AGeV): -6 <  < 6 dN/d  (  =0)=610. Nch =5100 oLHC (  s=5800 AGeV): -9 <  < 9 RHIC 200 BRAHMS 200AGEV

14 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Limiting particle prod. in fragmentation region oRHIC: saturation of particle production in fragmentation region is already achieved at SPS. o  Width of Frag. Region is   3. oLHC:  = (–9,+9) oRHIC200:  = (–6,+6). o  May expect that central region at LHC extends to – (6,+6). o  Si-FMD and V0 detectors cover (-1.5,5.3), i.e. interesting region. BRAHMS. Subm. to Phys Lett. B SPS BRAHMS: RHIC 200. Prelim

15 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Si-FMD Role in Trigger Physics and rates oCentral Pb+Pb : Nch(Si) op+p Nch(Si) oPb+Pb 8kHz. (1kHz central) oAverage event spacing >100  s op+p up to 1 coll/bunch crossing oAverage event spacing 25 ns WHO does it? oLVL0 Timing: T0 oVertex (  1-2 cm) T0 oVertex (  cm) TPC oRough on-line Centrality cut on dE V0 op+p trigger V0 oTiming+vertex(p+p) T0,V0 oPrecise centrality Si oFluctuations Si oAzimuthal distribution Si oOff-Line PID (dE) Si oLevel 0 T0,V0 oOff-line, Higher level Si

16 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Electronics overview oAssume 128 strips/wafer oAssume 32 channels/chip oAssume 8 chips/RO card

17 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Cost Estimate oVERY uncertain and preliminary estimate in CHF. o6”Ø: still experimental oTest production batch: wafers

18 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Si-FMD Timetable. ItemStatusEst. completion dateComments Overall system designOngoingJuly 2001 Choice of RO electronicsOngoingSeptember 2001 exploration Procure Test wafersOctober 2001 Needs industry survey Procure test RO electr. October 2001 Mechanical design and integration in ALICE OngoingDecember 2001 Assembly test detector March 2002 Tests with sources/beam March 2003 Final design June 2003 Procure full Si and FE June 2003 Manufacture mechanics December 2003 Delivery February 2004 Assembly full system October 2004 Installation in ALICE June 2005 First p+p runs August 2006 First A+A runs Spring 2007

19 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Responsibilities Si-FMD TASKS oUpdate geometry and integration drawings oUpdate simulations of background, resolution and performance oChoice of electronics oTender and order prototype 6” wafers oConstruct and test FE+RO system oTest DAQ and integrate with DAQ oUpdate prelim-TDR-started oPPR- needs to develop WHO? oNBI oINR oNBI oNBI + ? o? oNBI, INR, Athens, ?

20 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Responsibilities T0 & V0 TASK oT0 Tech. Design study oT0- technology decision and funding oT0 prototyping oV0 TDR oPrototyping Who? oMEPHI and Jyvaskyla o ” oLyon and Mexico

21 ALICE FMD 11/9 2001Jens Jørgen Gaardhøje, NBI, Endorsed Recommendation to ALICE Forum,TB,MB,CB oSi-FMD acceptance downscoped to <  < <  < 3.58 oBackground from beam pipe important-> redesign needs to be pursued oSi-FMD not present in trigger at LVL0. Analog sum trigger for LVL1 seems possible but not likely. oFEE /(ampl. Chip. Hybrid, ADC, receiver) can be developed together with IDEAS-Norway. oRevisit  segmentation for flow analysis oT0 is main Alice timing trigger oTwo arm necessary for good vertex also in absence of TPC and pixels oRadiator-PM is baseline design oTwo-arm V0 for beam gas- rejection oV0 is main Alice centrality trigger oIntegrate Si3, T0(L), V0(L) and PMD


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