Straw Detectors for the Large Hadron Collider 1
B-Mesons Bd π π? B-Mesons properties? Charge parity symmetry violation? 2
Proton-Proton Collision Bd proton LHC Start 2007 π proton 14 TeV π? B-Mesons properties? 3
magnetic Spectrometer π π proton Bd position 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 Straw Tube 6
Drift time measurement time measurement Drift time Radius exact track position Straw Tube 7
LHCb π π proton Bd proton B-Field? B-Mesons properties? Straw detector 8
LHCb π π proton Bd proton B-Field? B-Mesons properties? Straw detector 9
LHCb 20m 10
The Challenge The Goal: spacial resolution 200 m for 5 x 6m detector The conditions: 40 MHz collision rate (every 25 ns) >200 tracks per event 1.1 MHz Readout 11
Straw Outer Tracker 55000 Straws 5m module: 256 straws 6m 2.5mm 12
Straw Detector Production 13
Straw Detector Production two panels are mated straws in template: 100 μm precision anode wire tension test 14
Status of module production in HD Module 40 produced. Total of 67 modules will be built until end of the year. 15
Quarter Station 16
Quarter Station 5m Straw module 17
LHCb installation 18
Straw Readout Electronics pulse at particle transition optical Receiver card module: 128 straws optical Receiver card TDC TDC TDC optical Transmitter board Readoutboard Switch TDC PC PC PC PC PC detector counting room 19
Straw Readout Electronics amplification/ discrimination module: 128 straws optical Receiver card optical Receiver card TDC TDC TDC optical Transmitter board Readoutboard Switch TDC PC PC PC PC PC detector counting room 20
Straw Readout Electronics time measurement t=01001101 module: 128 straws optical Receiver card TDC TDC TDC optical Receiver card optical Transmitter board Readoutboard Switch TDC PC PC PC PC PC detector counting room 21
TDC (OTIS) TDC = Time to Digital Converter LHC clock (40 MHz) Signal from T coded 2+6 Bit Developed at the ASIC Lab HD now in production time resolution 0.5 ns 1.1 MHz readout rate 22
Straw Readout Electronics 19.2 GBit/s x12 module: 128 straws 1.6 Gbit/s optical Receiver card optical Receiver card TDC TDC TDC optical Transmitter board 120 m Readoutboard Switch TDC PC PC PC PC PC detector counting room 23
Straw Readout Electronics optical Receiver card module: 128 straws optical Receiver card TDC TDC TDC optical Transmitter board Readoutboard Switch 2000 CPUs TDC PC PC PC PC PC detector counting room 24
Full system test: e-test Beam in Hamburg 4 Modules from the production final electronics 25
Straw Detector Straw Detector 26
/Discriminator 27
Time to Digital Converter Time measurement 28
Drift Time Time measurement 29
Drift time to Radius Time measurement 30
Spacial Resolution σ=170μm 31
Results from e- Test Beam resolution [μm] 200 μm spacial resolution well met 200 μm working point 32
Results from e- Test Beam 200 μm spacial resolution well met efficiency [%] 98% 98% efficiency working point 33
Summary 60% of straw modules produced in Heidelberg TDC and optical readout electronics developed in Heidelberg, now in production 200 μm resolution well surpassed in full system test, all specifications are met We are prepared for run start in 2007! 34
The PI Outer Tracker Crew management: Prof. Dr. F. Eisele and Prof. Dr. Ulrich Uwer module production and tests: Sebastian Bachmann, Yuri Bagaturi, Tanja Haas, Simon Rabenecker, Christian Rummel electronics: Jan Knopf, Ralf Muckerheide, Albert Rausch, Rudolf Rusyak, Uwe Stange, Ulrich Trunk, 35
36
Schema FE-Box TTC PC Module 4 Module 3 Module 2 Module 1 Scintillator Scintillator I²C + Laptop SiTelescope optical receivercard Stratix FE-Box 37
Beam profile channel Electron beam 7GeV Beam width 5cm 8 layers ea. 64 straws Trigger rate 1kHz noise <0.3 % 38
Test beam results Drift time max. 50 ns Efficiency >98% resolution better than 200 µm Readout works from straw to PC ns 39
ASDBLR (ATLAS DEMILL) with 12 ns shaping time 2x 8 channels per board 40
drift time [binary] Linearity Plot Hit Delay [ns] 41
front end box optical transmitter board water cooling 20W TDC boards s 42
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 43
LHCb Straw Detector: Momentum of charged particles 44
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 45
optical Transmitter board 1.6 Gbit/s throughput Jitter filter ( 7ps RMS) 46
optical Receiver board 19,2 Gbit/s Bit error rate < 10-15 47
Data transmission quality no ambiguities logic 1 logic 0 t=0 t=1 t=2 48