29/09 2004jens jørgen gaardhøje, nbi, [email protected] forward detectors tdr fmd, t0, v0 editorial...
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29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 1
Forward Detectors TDRFMD, T0, V0
Editorial team:I.G. Bearden (NBI)
H. Bøggild (NBI)
C.Holm (NBI)
J.J. Gaardhøje (NBI)
J.Y. Grossiord (Lyon)
T. Malkiewicz (Jyvaesk.)
B.S. Nielsen (NBI)
G. Paic (Mexico)
W. Trzaska (Jyvaeskyla)
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 2
ALICE Forward Detectors
FMD (Forward Multiplicity Detector) NBI+INR 5 Si-strip Ring counters with 51.200 channels 1.7< < 5.0; -1.7< <-3.4 Precise off-line charged particle multiplicity for A+A, p+p Fluctuations event-by-event, flow analysis
V0 (Centrality and collision vertex) Lyon+Mexico 2 arrays of 32 plastic scintillator tiles w. fiber+PMT 2.8< < 5.1; -1.7< < -3.7 Main L0 MinBias for p+p and A+A and centrality trigger A+A Background (Beam-Gas) rejection, TRD wakeup
T0 (Beam-Beam Detector) Jyvæskyla+MEPhI,INR,Budker,Kurchatov
2 arrays of 12 Cerenkov radiators + PM tubes 4.5< < 5.0; -2.9< < -3.3 Fast timing L0 signal (=50ps), online vertex determination Main time reference, TRD wakeup, backup for MinBias trigger
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 3
Forward Multiplicity Detector(FMD)
FMD (Forward Multiplicity Detector) for ALICE
o Physics Goals o System Overview and Geometryo Simulated Performanceo Silicon strip detectors:
o Sensors, modules, rings o Readout electronics:
o Preamplifier, digitizer, readout/controlo Integration in ALICEo Timescale/Milestones
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 5
Rapidity Coverage
FMD3: Outer: -2.29< <-1.70
Inner: -3.40< <-2.01
FMD2: Outer : 1.70<<2.29
Inner : 2.28< <3.68
FMD1: Inner: 3.68< <5.03
3 INNER rings:
20φ, 512 strips
2 OUTER rings:
40φ,256 strips
TOTAL: 51200 ch
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 6
Low Occupancy, Precise multiplicity
2
Occupancy:
< 3 for all collisions
<1 for most
=>Energy and counting mode
Precise multiplicity reconstruction
1
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 7
Background, Fluctuations
Background from secondaries from other ALICE detectors
Background from secondaries:
Determines the ability to study fluctuations
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 8
Si sensors from 6 ” wafers
Si-Sensors:
300 μm Si wafer,
2 φ sectors of 512 (256) strips each.
Contract awarded to Hamamatsu
First prototype to be delivered in December 2004.
Inner
Outer
6”
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 10
Ring mounting on RB26
Displacement < 50 μ
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 11
Pre amplifier and hybrids
Pre-amplifier chip:
’VA1-Alice’ from IDEAS.
128 ch, RadHard (0.35μ tech), dynamic range 20 MIP, Low noise, <25pF
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 12
Pre amplifier chip production completed
Production of 500 chips completed.
First lab. tests:
Noise: 185 e- => S/N=125
Good linearity ,
peaking time 1.2 – 1.7 μsec.
1.2 μs
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 13
FMD ReadOut Electronics Scheme
FMD ModuleON DETECTOR
INCOUNTING
ROOM
VA
1 ring: 10/20 modules 2 Digitizers 1 RCU per ring systemFull FMD: 70 modules 10 Digitizers 3 RCU’s
FMD Read-Out and Control Electronics
VA read-outcontrol
VA read-outcontrol
TTC-RX
BOARDCTRL
FMD Digitizer
ALTRO(16 ch) ALTRO(16 ch)
ALTRO(16 ch)ALTRO(16 ch)
ALTRO(16 ch)ALTRO(16 ch)
Read-out CTRLRead-out CTRL
BSN, 17 Feb 2004
Loca
l Mon
itor
and
Con
trol
BOARDcontroller
Bus
con
trol
ler
( co
nf. &
R/O
)
DCS int.(Ethernet)
DAQ int.(DDL-SIU)
Trigger int.(TTC-rx)
Data Proc.and Memory
DCS
DDL
TTC optical Link
(Clock, L1 and L2 )
RCU
Front-end bus 1 m
Front-end bus 1 m
16 16
Control Network(I2C-serial link)
Control Network(I2C-serial link)
Trigger L0
NEAR PATCH PANEL
Analog serial link(10 MHz) 0.5 mAnalog serial link(10 MHz) 0.5 m
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 14
VA-ALICE-ALTRO compatibility demonstrated
Digitizer board with 3 ALTRO chips is under design & construction at NBI.
RCU identical to TPC, PHOS
DAQ and DCS is similar to other systems
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 15
FMD electronics total
Segments (wafers)
Phi sectors
Radial strips
FE channelsVA chips
(128 ch/chip)
ALTRO chips
FMD
Digitizers
FMD
RCU
FMD3 inner
10 20 512 10,240 80 6 2 1
FMD3 outer
20 40 256 10,240 80 6 2
FMD2 inner
10 20 512 10,240 80 6 2
FMD2 outer
20 40 256 10,240 80 6 2 1 or 2
FMD1 10 20 512 10,240 80 6 2
Total system
70 140 51,200 400 30 10 2 or 3
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 16
Integration in ALICE- RB26
1:1 scale model to study
mechanics and cabling.
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 18
FMD Timescale
Item Milestone (completion) date)
TDR submitted September-04Production VA1-ALICE completed September-04Delivery prototype hybrid card December-04Delivery prototype inner Si sensor December-04Prototype Digitizer card produced January-05Lab test: Si-FEE-Digitizer system March-05Order full Si set May-05Order full hybrid set May-05Electronics production finished August-05Bonding at CERN October-05Full system test with DAQ November-05Detector assembly December-05Ready to install February-06
OKOK
System Cost: 800 kCHF
29/09 2004
Jens Jørgen Gaardhøje, NBI, [email protected] 20
Breakdown of FMD cost
Silicon strip detectors 345 kCHF
Front End (Chips and hybrids) 240 kCHF
Back End (Digitizer, RCU, DAQ)
70 kCHF
Mechanics(Cones, Supports, transport)
55 kCHF
Power supplies and cables, contingency
90 kCHF
Total system cost 800 kCHF
