Straw Detectors for the Large Hadron Collider. Dirk Wiedner

Transcription

1 Straw Detectors for the Large Hadron Collider 1

2 B-Mesons Bd π π? B-Mesons properties? Charge parity symmetry violation? 2

3 Proton-Proton Collision Bd proton LHC Start 2007 π proton 14 TeV π? B-Mesons properties? 3

4 magnetic Spectrometer π π proton Bd position proton B-Field? B-Mesons properties? Straw detector 4

5 Tracking with Straws π π proton Bd proton Track /Momentum! B-Field? B-Mesons properties? Straw detector 5

6 Drift time measurement Straw Tube 6

7 Drift time measurement time measurement Drift time Radius exact track position Straw Tube 7

8 LHCb π π proton Bd proton B-Field? B-Mesons properties? Straw detector 8

9 LHCb π π proton Bd proton B-Field? B-Mesons properties? Straw detector 9

10 LHCb 20m 10

11 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

12 Straw Outer Tracker Straws 5m module: 256 straws 6m 2.5mm 12

13 Straw Detector Production 13

14 Straw Detector Production two panels are mated straws in template: 100 μm precision anode wire tension test 14

15 Status of module production in HD Module 40 produced. Total of 67 modules will be built until end of the year. 15

16 Quarter Station 16

17 Quarter Station 5m Straw module 17

18 LHCb installation 18

19 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

20 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

21 Straw Readout Electronics time measurement t= 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

22 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

23 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

24 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

25 Full system test: e-test Beam in Hamburg 4 Modules from the production final electronics 25

26 Straw Detector Straw Detector 26

27 /Discriminator 27

28 Time to Digital Converter Time measurement 28

29 Drift Time Time measurement 29

30 Drift time to Radius Time measurement 30

31 Spacial Resolution σ=170μm 31

32 Results from e- Test Beam resolution [μm] 200 μm spacial resolution well met 200 μm working point 32

33 Results from e- Test Beam 200 μm spacial resolution well met efficiency [%] 98% 98% efficiency working point 33

34 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

35 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 36

37 Schema FE-Box TTC PC Module 4 Module 3 Module 2 Module 1 Scintillator Scintillator I²C + Laptop SiTelescope optical receivercard Stratix FE-Box 37

38 Beam profile channel Electron beam 7GeV Beam width 5cm 8 layers ea. 64 straws Trigger rate 1kHz noise <0.3 % 38

39 Test beam results Drift time max. 50 ns Efficiency >98% resolution better than 200 µm Readout works from straw to PC ns 39

40 ASDBLR (ATLAS DEMILL) with 12 ns shaping time 2x 8 channels per board 40

41 drift time [binary] Linearity Plot Hit Delay [ns] 41

42 front end box optical transmitter board water cooling 20W TDC boards s 42

43 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

44 LHCb Straw Detector: Momentum of charged particles 44

45 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

46 optical Transmitter board 1.6 Gbit/s throughput Jitter filter ( 7ps RMS) 46

47 optical Receiver board 19,2 Gbit/s Bit error rate <

48 Data transmission quality no ambiguities logic 1 logic 0 t=0 t=1 t=2 48