alice fmd 11/9 2001jens jørgen gaardhøje, nbi, [email protected] agenda oapproval of agenda and...
TRANSCRIPT
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 1
ALICE FMDAGENDA
Approval of agenda and minutes of last meeting Integration. L. Leistam (09.10-09.25) FMD design overview. JJG (09.25-09.50) Si-FMD Background simul. A. Maievskaia (09.50-
10.15) Si-FMD FE and RO electronics. B.S.Nielsen (10.15-
10.40) Coffee break Si Prototype. A. Angelis/NN (11.00-11.25) T0 status. V.Grigoriev/ H. Trzaska (11.25-11.50) V0 status J.Y.Grossiord/L. Montano (11.50-12.15) PMD news. Y. Viyogi (?) (12.15-12.30)
Summary-Conclusions-Actions, Formation of TDR writing group. JJG+All (12.30-13.00) AOB
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 2
ALICE FMDMain issues
Si-FMD Freeze inner radius?
Freeze general geometry.
Integration with ITS and other FD
Define Services (cables, cooling, etc.)
Define Responsibilities, timetable
Go to bids. Commence Prototyping.
T0 Define final geometry
(L,R) Trigger Timetable Go to prototyping
V0 Design status Integration, trigger Prototyping.
Organization Responsibilities TDR writing group
formation
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 3
ALICE FMDOverall Geometry
-5.4< <-1.6 3 < < 1.6
eta vs distance for various R
0
1
2
3
4
5
6
7
0 200 400 600 800
d (cm)
eta
eta15
eta3
eta6
eta9
eta12
Radius vs eta at various distances from IR
0,0
5,0
10,0
15,0
20,0
25,0
30,0
35,0
40,0
0 2 4 6 8
eta
R(c
m)
d=90
d=180
d=270
d=360
d=450
d=540
d=630
Si 4 Si3(moved)
Si2 Si1
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 4
ALICE FMDIntegration in ALICE
Si-1Si-2
Si-3
V0-R
T0-R
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 5
ALICE FMDSi1 with 6” Wafers
2 Rings
Si 1 inner
Si 1 outer
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 6
ALICE FMDSi1 with 6” Wafers
R=5.3cmR=17.1cm
R=28.8cm
R=39.9cm
R=35.1cm
R=22.1cm
24
24
16
8
2 Rings
Inner Ring
Outer Ring
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 7
ALICE FMDRing geometry
W afer Ø Solution #Rings #W afers Eta coverage
6" 6b 3 8 3.2 - 2.016 2.3 - 1.824 1.8 - 1.5
48
6c 2 8 3.2 - 2.024 2.0 - 1.632
4" 4b 4 8 3.2 - 2.3162432
80
4c 3 8 3.2 - 2.324 2.3 -1.936 1.9 - 1.6568
!!30 cm vertex shift: 1.2
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 8
ALICE FMDBackground and acceptance
Pseudorapidity coverage
Si1 & Si2 (inner and outer)
d(IR)=62.8 and 75.8 cm: 1.51 <||< 1.94 2.03 <||< 3.58
Si3: d(IR)345cm -5.28 << -3.71
Vertex shift (30cm): |d| 0.3
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 9
ALICE FMDBackground simulations
Alla Maevskaia
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 10
ALICE FMDBackground simulations
Alla Maevskaia
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 11
ALICE FMDBackground simulations
Alla Maevskaia
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 12
ALICE FMDBackground simulations
Alla Maevskaia
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 13
ALICE FMDRHIC vs. LHC
RHIC (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
LHC (s=5800 AGeV): -9 << 9
BRAHMS @ RHIC 200
BRAHMS 200AGEV
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 14
ALICE FMDLimiting particle
prod. in fragmentation region
RHIC: saturation of particle production in fragmentation region is already achieved at SPS.
Width of Frag. Region is 3.
LHC: = (–9,+9) RHIC200: = (–6,+6). May expect that
central region at LHC extends to –(6,+6).
Si-FMD and V0 detectors cover (-1.5,5.3), i.e. interesting region.BRAHMS. Subm. to Phys Lett. B. 2001
SPS
BRAHMS: RHIC 200. Prelim
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 15
ALICE FMDSi-FMD Role in Trigger
Physics and rates Central Pb+Pb : Nch(Si) 15.000-20.000 p+p Nch(Si) 50-100
Pb+Pb 8kHz. (1kHz central)
Average event spacing >100s
p+p up to 1 coll/bunch crossing
Average event spacing 25 ns
WHO does it? LVL0 Timing: T0 Vertex ( 1-2 cm) T0 Vertex ( 0.1-0.2 cm) TPC Rough on-line Centrality
cut on dE V0 p+p trigger V0 Timing+vertex(p+p) T0,V0
Precise centrality Si Fluctuations Si Azimuthal distribution Si Off-Line PID (dE) Si Level 0 T0,V0 Off-line, Higher level Si
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 16
ALICE FMDElectronics overview
Assume 128 strips/wafer Assume 32 channels/chip Assume 8 chips/RO card
Wafers Phi sectors Strips/wafer Channels FE Chips Chips/card FE Cards
Si 1 inner ring 8 16 128 2048 64 8 8
Si 1 outer ring 24 24 128 3072 96 8 12
Si 2 inner ring 8 16 128 2048 64 8 8
Si 2 outer ring 24 24 128 3072 96 8 12
Si 3 8 16 128 2048 64 8 8
Si 4 8 16 128 2048 64 8 8
Total inner 48 48 6144 192 24
Total outer 32 64 8192 256 32
Total system 80 112 14336 448 56
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 17
ALICE FMDCost Estimate
Item Units Unit price Total Summed
Si-wafers
Proto 1 25 50000
Proto 2 25 50000
Production 1 25 25000
Production 2 25 25000
Misc. 20000
Si total 170000
Electronics
Chips 448 100 44800
FE cards 56 300 16800
Hybrids 112 100 11200
Misc. 20000
FE total 92800
Construction
Assembly/bond 50000
Mechanical 50000
Test 70000
Assembly total 170000
Transportation 20000
Installation 20000
Receiver 100000
DAQ 50000
Grand total 582800
VERY uncertain and preliminary estimate
in CHF. 6ӯ:
still experimental Test production
batch: 16-25 wafers
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 18
ALICE FMDSi-FMD Timetable
. Item Status Est. completion date Comments
Overall system design Ongoing July 2001
Choice of RO electronics Ongoing September 2001 exploration
Procure Test wafers October 2001
Needs industry survey
Procure test RO electr. October 2001
Mechanical design and integration in ALICE
Ongoing December 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
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 19
ALICE FMDResponsibilities Si-FMD
TASKS Update geometry and
integration drawings Update simulations of
background, resolution and performance
Choice of electronics Tender and order
prototype 6” wafers Construct and test
FE+RO system Test DAQ and integrate
with DAQ Update prelim-TDR-
started PPR- needs to develop
WHO? NBI
INR
NBI NBI
NBI + ?
?
NBI, INR, Athens, ?
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 20
ALICE FMDResponsibilities T0 &
V0
TASK T0 Tech. Design study T0- technology decision
and funding T0 prototyping
V0 TDR Prototyping
Who? MEPHI and Jyvaskyla
”
”
Lyon and Mexico
11/9 2001 Jens Jørgen Gaardhøje, NBI, [email protected] 21
ALICE FMDEndorsed
Recommendation to ALICE Forum,TB,MB,CB Si-FMD acceptance
downscoped to -5.28 < < -3.71
1.51 < < 3.58 Background from beam
pipe important-> redesign needs to be pursued
Si-FMD not present in trigger at LVL0. Analog sum trigger for LVL1 seems possible but not likely.
FEE /(ampl. Chip. Hybrid, ADC, receiver) can be developed together with IDEAS-Norway.
Revisit segmentation for flow analysis
T0 is main Alice timing trigger
Two arm necessary for good vertex also in absence of TPC and pixels
Radiator-PM is baseline design
Two-arm V0 for beam gas-rejection
V0 is main Alice centrality trigger
Integrate Si3, T0(L), V0(L) and PMD