1 conceptual design adopts state-of-the-art silicon sensor techniques (compare atlas/cms/alice inner...
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Conceptual design adopts state-of-the-art silicon sensor techniques (compare ATLAS/CMS/ALICE inner tracker layers, BaBar tracking of B mesons).
Design features:• Minimum of 4 space points forward of 90°• Barrel and forward disk structures• Pixels and double-sided strips• Smallest possible inner radius• Fast and untriggered readout
The Micro-Vertex Detector The Micro-Vertex Detector of of PPANDAANDA
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Micro-Vertex DetectorMicro-Vertex Detector
10 cm
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The PANDA Micro-Vertex DetectorExperimental task list:
• Precision identification of D mesons by fast reconstruction
• Measurement of long-lived baryons and mesons (open charm and strangeness)
• Seeding for tracking device through high time-resolution and precise spatial information close to the vertex point
• Limited particle identification
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The PANDA Micro-Vertex DetectorContributors and Competence:
• TU Dresden ( group moving to U Bonn): Strip sensor tests, layout, mechanics, readout for strip sensor part.
ELBE electron accelerator, ELSA electron accelerator, neutron generators, neutron sources, skilled electronics lab.
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The PANDA Micro-Vertex DetectorContributors and Competence:
• FZ Jülich: Pixel detector readout, mechanics.
COSY proton synchrotron, very skilled mechanics and engineering infrastructure, very skilled electronics infrastructure, experience in silicon detector technology.
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The PANDA Micro-Vertex DetectorContributors and Competence:
• INFN Torino: Pixel sensor readout and tests, layout, mechanics, readout for pixel sensors, sensor R&D.
Long-term involvement in CERN LHC experiments, pixel sensor development at all stages, in particular readout, design of front ends on chip level, practical experience in the setup and operation of large silicon detector arrays.
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The PANDA Micro-Vertex DetectorCooperation and common interest with:
• CBM/GSI: Technology for strip detector readout due to very similar requirements and challenges n-Xyter development for a strip sensor frontend with triggerfree readout.
• PANDA hypernuclei experiment (U Mainz).
• Sensor foundries (CIS, ITCirst).
• FH Aachen (lightweight frame)
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Conceptual design adopts state-of-the-art silicon sensor techniques (ATLAS/CMS/ALICE inner tracker layers)
Design features:• 5 layers forward of 90°• Barrel and forward disk structures• Pixels and double-sided strips
• Smallest possible inner radius• Fast readout
Micro-Vertex Detector
p beam
10 cm
pellet or cluster jet target
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Detector Optimization in SimulationsDetector Optimization in Simulations
Micro-Vertex Detector - Micro-Vertex Detector - SimulationsSimulations
rate / ^MH
z
Calculations of various reaction channels, UrQMD, DPM of p on p and nuclear targets
- rate estimates (data rates → electronics!)
- reconstruction
→ resolution
→ detector layout
- mechanics
very anisotropic load!
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Micro-Vertex Detector - Micro-Vertex Detector - SimulationsSimulations
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Micro-Vertex Detector - Micro-Vertex Detector - SimulationsSimulations
Radiation load maps
ppp at 10 GeV/c p at 10 GeV/c ppPb at 4.05 GeV/c Pb at 4.05 GeV/c
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Detector Optimization in SimulationsDetector Optimization in Simulations
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Mechanical Model – v1.0
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Micro-Vertex Detector – Micro-Vertex Detector – Building BlocksBuilding Blocks
Two compact layers of pixel sensors:• Barrel structures• Forward walls integrated in the disks
Two layers of pixel sensors:• Barrel structures from double-sided rectangular sensors• Forward pizzas from trapezoidal sensors• Additional pizzas further downstream to supplement forward tracking
► total of four disks
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Micro-Vertex Detector - Micro-Vertex Detector - PixelsPixels
PANDA optimized pixel layout:• Small pixel cells – 100 x 100 µm2
• Specialized custom hybrid
features: - .13 µ technology
- ToT to retain (some) energy information
- fast handling for high data rates
- “untriggered” readout of data
- rad hard within “typical” limits
- minimum material load sensor technology
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TOPIX ASIC• .13 µ technology• pixel size 100x100 µm2
• high readout capability• sufficient buffering to operate without trigger• ToT
•Sensors on EPI: < 100 µm thickness
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Readout Prototype
Versatile digital readout board
First tests with ATLAS FE
Digital part can be adapted to TOPIX
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Mechanicscooling, cables,
frames
CARBON FIBER 0,2 mm
FOAM 1 mm
PIXEL + CABLE 0,2 mm
Overlapping layout
Turbo layout
Work on mechanical layout
Scenarios for cooling:
- Cooling liquid (water or C6F14)
- Evaporative cooling system
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Micro-Vertex Detector - Micro-Vertex Detector - StripsStrips
PANDA strip layers:• Substitute strips for pixels to keep number of space points with less traversed material where possible• Use standard solutions where possible
features: - pitch of 50 – 100 µm
- double-sided sensors, 200 µm thick
- need specialized solution for front-end to achieve untriggered readout
synergy CBM / PANDA on n-XYTER
- minimum possible thermal load
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Strip Sensors – Test Station
sensor
sensor “telescope” ITCirst, 20x20 mm2
50 µm pitch
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Strip Sensors – Test Station
sensor “telescope” ITCirst, 20x20 mm2
50 µm pitch
Readout of signals: front end APV25 S1
50 µm
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Strip Sensors – Test Station
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single-side readout
1 readout slice / 128 channels(one APV 25)
Strip Sensors – Test Station
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Strip Sensors – Test Station
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PPANDAANDA MVD Summary MVD Summary• PANDA will greatly benefit from a state-of-the-art silicon tracking device.
• PANDA-specific challenges: very compact design, high and anisotropic data rates, free-running DAQ concept (untriggered readout), material budget.
• PANDA-specific solutions needed: pixel readout, strip front-end (synergy with other FAIR experiments), compact arrangement around fixed target.
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PPANDAANDA MVD Summary (II) MVD Summary (II)• Silicon detector development uses and drives key technologies of solid state industry (e.g. flip chip in 130 nm rad-hard)
• The PANDA MVD project suffers from a lack in qualified contrbutors, in particular in the strip part, more specifically in the critical forward disk part.
• Russian groups interested in the PANDA MVD have had great impact in detector developments of large scale experiments such as D0. Their bid to assume a leading role in the PANDA MVD project in a very critical and as of yet unsolved detector region will have great impact and will be highly welcomed.