The CBM Experiment
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The CBM Experiment
Radiation hard Silicon (pixel/strip) Tracking System in a magnetic dipole field
Electron detectors: RICH & TRD & ECAL: pion suppression better 104
Hadron identification: TOF-RPC
Measurement of photons, π0, η, and muons: electromagn. calorimeter (ECAL)
High speed data acquisition and trigger system
Cost Review Meeting May 31, 2005
Peter Senger, GSI
CBM component Cost M€
TSR
Silicon Pixel Detector 1 -1.5
Silicon Strip Detector 7
Ring Imaging Cherenkov Detector
6 - 10
Transition Radiation Detector 8 - 10
TOF stop detector (RPC) 5 - 7.4
Electromagnetic Calorimeter + preshower
12.2
Superconducting magnet 3
Data acquisition and trigger 4 - 6
Computing 3
Infrastructure 5
Sum 54.2 - 68.1
Total cost CBM Technical Status ReportJanuary 2005
Silicon Tracking System
Design goals: • low materal budget: d < 200 μm• single hit resolution < 20 μm• radiation hard (dose 1015 neq/cm2)• read-out time 25 ns
3 Pixel Stations and 4 Strip Stations (acceptance 2.5o < θ < 25o):
distance from target
(cm)
type area
(cm2)
5 pixel 25
10 pixel 100
20 pixel 400
40 strip 1600
60 strip 3600
80 strip 6400
100 strip 10000
Silicon Pixel Vertex Detector
R&D on Monolithic Active Pixel Sensors (MAPS):• pitch 30 μm • thickness below 100 μm • single hit resolution : 4 μm • radiation tolerant (1013 neq/cm2)• ultimate read-out time few μs
STS 1 - 3
CBM MAPS chips will look differently: Chip size: ~0.5 x 1 cm2, 50% sensor 50% r/o.
CBM MAPS ladders will consist of 5 chips.
Existing MAPS detector
“MIMOSA 5”
(1.7 x 1.9 cm2)
Two inner and two outer sectors, routing of readout microcables.
MAPS detector module: ladders mounted on either side of a substrate providing (active?) cooling
Vertex Detector section of the CBM Silicon Tracker
Design studies on a MAPS detector station
active
readout
Silicon Strip Tracker
4 Strip tracking stations Tracking Stations Nr. 4 and 6
Double sided Si-Strip detectors:thickness 100 - 150 μm pitch 25 μmStereo angle 15o
R&D/prototypingMAPS
Cost k€STRIPSCost k€
small sensor prototype 40 20
reticle-size prototype 200 50
radiation hard technology/design 20 50
front-end design + prototype chips - 20
chip/sensor thinning 100 20
low-mass Kapton bus 20 -
mockup of a detector module/station 10 20
prototype thin support, active cooling 50 -
prototype detector module/ladder 10 50
prototype front-end hybrid - 30
prototype readout board 10 10
prototype detector station 20 100
Sum 480 370
ProductionMAPS
Cost k€STRIPSCost k€
front-end chips 400 1200
sensors (tested) - 1600
front-end hybrid - 200
cables 10 20
low-mass Kapton cables 40 -
front-end chip acceptance tests 100 100
front-end hybrid assembly & test - 500
module assembly & tests, incl. spares 50 500
detector stations assembly 100 100
geometrical survey, alignement 20 30
Sum 720 4250
Infrastructure, Slow-Controls, IntegrationMAPSCost in
k€
STRIPSCost in
k€
Infrastructure
- custom-designed assembly tools 100 100
- wafer probe station - 500
- low-mass mechanical support 100 600
- cooling system 100 500
- power supply crates, LV, HVmodules 50 150
- VME-type DAQ crates & modules 50 50
- cooling unit 10 30
Slow-controls & readout
Online computers 10 10
Online control systems 40 60
Integration
System assembly and test 20 80
Installation into experiment 20 40
Maintenance/sensor replacement 200 200
Sum 700 2310
Silicon Tracking SystemMAPSCost in
k€
STRIPSCost in
k€
Sum 1900 6930
Silicon Tracking Station
Design of a fast RICH
Design goals: • electron ID for γ > 42• e/π discrimination > 100• hadron blind up to about 6 GeV/c• low mass mirrors (Be-glass)• fast UV detector
Radiator Vessel volume ~ 60 m3
Photon-detector: 105 PM tubes, 6 mm
ø
Mirror: 19 m2, Be-glass (X = 1.25% X0)
RICH components
RICHthe cost of the items include material, design, construction
Item cost (k€)
radiator vessel and support, 60 m3 250
radiator gas supply system incl. controls and monitoring 300
Be-glass mirrors, 19 m2, 100 hexagonsAlternative: glass mirrors
2500(200)
mirror support structure 400
Photodetectors (PMT FEU-Hive), 105 channels 1500
Front-End electronics, 105 channels 600
HV supply, 105 channels 500
Photodetector support and magnetic shielding 150
light guides, 105 channels 100
Services (cables, crates, ...) 250
prototyping and tests 200
commissioning 50
safety 50
installation 30
alignment 50
transport 20
hired manpower
R&D 70
infrastructure 50
maintenance and operation
7070 (4770)
Design of a fast TRD
Simulation of pion suppression: MWPC based TRD
90%.
Design goals: e/π discrimination of > 100 (p > 1 GeV/c)• High rate capability up to 100 kHz/cm2
• Position resolution of about 200 μm• Large area ( 450 - 650 m2, 9 – 12 layers)
Item cost (k€)
radiator ( 480 – 640 m2) 450-600
read-out chambers (480 – 640 m2) 2000-2600
Services (HV, LV, cooling) 1000-1200
gas supply system incl. controls 300-400
mechanics, mainfraime 700-800
Front End Electronics (5.6 – 7.5x105channels) 2600-3000
commissioning 200
prototyping and tests 200
spare parts 100
safety 100
installation 100-200
alignment 100
transport 100
hired manpower 100
R&D 400
infrastructure, cables, crates 200
maintenance and operation 100/y
Sum 8750 - 10400
TRD (MWPC based)the cost of the items include material, design, construction
single cell RPC shielded RPC prototype
Design goals: • Time resolution ≤ 80 ps• Rate capability up to 20 kHz/cm2
• Efficiency > 95 %• Large area 100 m2
• Long term stability
Layout options
Development of a large-area high-rate timing RPC
TOF-RPCThe cost include material, engineering design, and construction
Item cost (k€)
glass plates (low resistivity, 1100 m2) 330-900
detector modules (110 m2) 500-600
mechanical structure, mainframe 300-400
Services (HV, LV, cooling) 450
gas supply system incl. controls 150-200
FEE: preamplifier/discriminator (65000 channels) 800
FEE: digitizer and clock 2000
cables, crates 300-400
prototyping and tests 300
commissioning -
spare parts 400
safety 50
installation 50
alignment
transport 50
hired manpower
R&D 200
infrastructure
maintenance and operation (power 100 kW, gas )
30
Sum 5910 - 6830
ECAL region Inner Middle Outer Cell size 4x4 cm2 6x6 cm2 12x12 cm2 No. of channels 6300 6400 4100
LHCb
The Electromagnetic Calorimeter
Moliere radius
lead thickness
scintillator thickness
No of layers ( X = 20 X0)
cell length
4 cm 0.275 mm 0.8 mm 390 466 mm
6 cm 0.275 mm 1.5 mm 360 680 mm
CBM -ECAL
ECAL The cost include material, engineering design,and construction
Item cost (k€)
4100 outer modules (460 € per piece) + 1500 HERA-B modules
1886
1600 middle modules (700 € per piece) 1120
700 inner modules ( 1250 € per piece) 875
Tooling for construction and assembly 250
16800 PMT (90 € per piece) + 1500 HERA-B PMT 1512
18000 SiPM (for preshower) (10 € per piece) 180
ECAL HV system: 16800 CW-bases (50 € per piece) + 1500 HERA-B CW-bases
840
mechanical structure 300
Front End Electronics for ECAL: 16800 channels ( 50 € per channel)
840
Front End Electronics for PreShower: 18000 channels ( 30 € per channel)
540
spare parts (1%) 168
Safety
Installation & alignment (provided by Russia) 20 man-years
Transport 65
hired manpower 2 man-years
R&D 200
infrastructure, cables, crates 400
maintenance and operation
Sum 9176
Parameter Quantity Dimension Weight of yoke 37 ton Coil windings 270 Gap maximal 845 mm Gap minimal 368 mm Ampere turns 600000 Field length 1200 mm Maximum field 1.7 T Time to cool down 48 hours Time to ramp-up field 45 minutes Thermal stream to Helium vessel 6 W Thermal stream to Nitrogen screen 30 W
"Alligator"
Superconducting Dipole Magnet
Iron yoke: weight 67 tons (max. 10 tons per segmentCoil: • two half-circles (radius = 0,5 m) connected by a 12 cm long straight section.• 2 pancakes, 9 layers, 15 turns. Cross section of the turns 4,5 x 7 mm2
Superconducting dipole magnet
Item cost (k€)
material superconducting coils 400
material iron (yoke and pole shoe) 180
material cryostat 15
material mechanics, support 25
engineering design coils 15
engineering design yoke and pole shoe 8
engineering design cryostat 25
engineering design mechanics, support 20
construction coils 40
construction yoke and pole shoe 350
construction cryostat 330
construction mechanics, support 45
prototyping and tests 150
power supply 35
commissioning 100
transport 25
installation 30
infrastructure, cables, cooling, 75
maintenance and operation 25
Sum 1893
Totel sum 2245
L1 Select
Special
hardware
High
bandwidth
Self-triggered FEE – Data Push DAQ
Detector
Cave
Shack
FEE
DAQ
Archive
fclock
L2 Select
Self-triggered front-end
Autonomous hit detection
No dedicated trigger connectivity
All detectors can contribute to L1
Large buffer depth available
System is throughput-limited
and not latency-limitedModular design:
Few multi-purpose rather
many special-purpose
modules
archive rate few GByte/s
DAQthe costs of the items include material, design, construction
Item cost (k€)
Data Buffers and Event building switch 1000
Hardware processors (FPGA based) (incl. crates, network, ect) 2000
Software processors (CPU based) 2000
R&D 500
5500
A reliable bottom-up components based cost estimate can only beprovided after the major architectural and technology choices are done.
Currently the best approach is to scale a similar experiment..BTeV used to be the most similar, with a L1 displaced vertex trigger.The BTeV TDR, which was reviewed and approved, states
FEE data rate: 500 GB/secL1/2/3 trigger uses ~1000 FPGA and 1000 software processorsready-date: October 2009 for 50% capacity, August 2010 for 100%investment cost: 10 M€ (or 12 M$) for DAQ + trigger (without contingency)
CBM has a factor 2 higher FEE data rate (~ 1 TB/sec)CBM has 5 years more time about a factor 5 gain from Moore's law
CBM DAQ and event selection: 5 M€
Infrastructurethe cost of the items include material, design, construction
item cost (k€)
railsystems for detectors 500
vacuum system (MAPS inside) 400
target (solid and gaseous) 300
power connections, cables 300
gas connections 100
beam dump 1800 t 1000
beam monitors, forward calorimeter 1200
air condition, cooling 500
cryo system dipole magnet 200
alignment system 200
crane 200
sum 4900
CBM component Cost M€
TSR
Cost M€
CORE
Silicon Pixel Detector 1 -1.5 1.9
Silicon Strip Detector 7 6.93
Ring Imaging Cherenkov Detector 6 - 10 4.77 - 7.070
Transition Radiation Detector 8 - 10 8.750 – 10.400
TOF stop detector (RPC) 5 - 7.4 5.910 – 6.830
Electromagnetic Calorimeter + preshower
12.2 9.176
Superconducting magnet 3 1.893
Data acquisition and trigger 4 - 6 5.5
Computing (Commissioning) 3 1
Infrastructure 5 4.9
Sum 54.2 - 68.1 50.729 – 55.599
Total cost CBMComparison: Tech. Status Report Jan 2005 Cost Review May 2005