Straw Detectors for the Large Hadron Collider 1
Tracking with Straws Bd π π? B-Mesons properties? Charge parity symmetry violation? 2
Tracking with Straws Bd proton LHC Start 2007 π proton 14 TeV π? B-Mesons properties? 3
Tracking with Straws π π proton Bd proton B-Field? B-Mesons properties? Straw detector 4
Tracking with Straws π π proton Bd proton Track /Momentum! B-Field? B-Mesons properties? Straw detector 5
Drift time measurement time measurement 6
LHCb π π proton Bd proton B-Field? B-Mesons properties? Straw detector 7
LHCb π π proton Bd proton B-Field? B-Mesons properties? Straw detector 8
LHCb 20m 9
The Challenge The Goal: spacial resolution 200 m for 5 x 6m detector The conditions: 40 MHz collision rate (ev. 25 ns) >200 tracks per event 1.1 MHz Readout radiation @ readout 10 krad 10
Straw Outer Tracker 5m 55000 Straws 6m 11
Straw Detector Production 12
Straw Detector Production two panels are mated straws in template: 100 μm precision anode wire tension test 13
Status of module production in HD Module 40 produced. Total of 67 modules will be built until end of the year. 14
Quarter Station 15
Quarter Station 5m Straw module 16
Straw Readout Electronics pulse at particle transition module: 128 straws optical Receiver board Readout board optical Receiver board optical Transmitter board Switch PC PC PC PC PC detector counting room 17
Straw Readout Electronics amplification/ discrimination module: 128 straws optical Receiver board Readout board optical Receiver board optical Transmitter board Switch PC PC PC PC PC detector counting room 18
Straw Readout Electronics time measurement t=01001101 module: 128 straws optical Transmitter board optical Receiver board Readout board optical Receiver board Switch PC PC PC PC PC detector counting room 19
Straw Readout Electronics 1.6 Gbit/s module: 128 straws optical Receiver board Readout board optical Receiver board optical Transmitter board Switch 120 m PC PC PC PC PC detector counting room 20
Straw Readout Electronics 19.2 GBit/s module: 128 straws optical Receiver board Readout board optical Receiver board optical Transmitter board Switch 2000 CPUs PC PC PC PC PC detector counting room 21
(OTIS) = Time to Digital Converter Readout window LHC clock (40 MHz) Signal from Preamp T coded 2+6 Bit Developed at the ASIC Lab HD now in production time resolution 0.5 ns Readout window: 75 ns 1.1 MHz readout rate 22
optical Transmitter board 1.6 Gbit/s throughput Jitter filter ( 7ps RMS) 23
optical Receiver board 19,2 Gbit/s Bit error rate < 10-15 24
Data transmission quality no ambiguities logic 1 logic 0 t=0 t=1 t=2 25
Full system test: 4 Modules from the production final electronics 26
results from e- test beam resolution [μm] 200 μm spacial resolution well met 200 μm working point 27
results from e- test beam 200 μm spacial resolution well met efficiency [%] 98% 98% efficiency working point 28
Summary 60% of straw modules produced in Heidelberg and optical readout electronics developed in Heidelberg, now in production 200 μm resolution well surpassed in full system test, all specifications are met 29
The PI Outer Tracker Crew management: Prof. Dr. F. Eisele and Prof. Dr. Ulrich Uwer module production and tests: Sebastian Bachmann, Iuri Bagaturi, Tanja Haas, Simon Rabenecker, Christian Rummel electronics: Jan Knopf, Ralf Muckerheide, Albert Rausch, Rudolf Rusyak, Uwe Stange, Ulrich Trunk, 30
Schema FE-Box TTC PC Module 4 Module 3 Module 2 Module 1 Scintillator Scintillator I²C + Laptop SiTelescope optical receivercard Stratix FE-Box 31
Beam profile Kanal Electron beam 7GeV Beam width 5cm 8 layers ea. 64 straws Triggerrate 1kHz noise <0.3 % 32
Test beam results Drift time max. 50 ns Efficiency >98% resolution better than 200 µm Readout works from straw to PC ns 33
ASDBLR (ATLAS DEMILL) with 12 ns shaping time 2x 8 channels per board 34
drift time [binary] Linearity Plot Hit Delay [ns] 35
front end box optical transmitter board water cooling 20W boards s 36
Readout board/l1-buffer Data from 24 halve modules LHCb wide standard Tasks: Deserialization Synchronization Processing Storage (60 ms = 65k Events) Ethernet data output to L1-Trigger and DAQ 37
LHCb Straw Detector: Momentum of charged particles 38
How do we meet the specs? 350 m2 of Straw detectors, 114 m2 made in HD each module 34 cm x 5 m high precision ~100 m light & tight Readout electronics from HD: Time to Digital Converters for < 1ns precision 1ns ~ 60 m Fiber optical readout with 650 GBit/s 39