1 Dirk Wiedner Straw Detectors for the Large Hadron Colider

2 Dirk Wiedner Tracking with Straws p p bd π Straw detector B-Field Track /Momentum! S N

3 Dirk Wiedner LHCb Straw Detector: Impact of charged particles

4 Dirk Wiedner LHCb RICHES: PID K, separation Calorimeter: PID: e,, 0 Myon System VELO: prim a ry+secund ary Vertex Impactparameter Trigger Tracker: p f o r Trigger Straw Detector: impact of charged particles Particle identification: Spursystem:

5 Dirk Wiedner Specifications The Goal: momentum resolution δp/p = 0.4% or 200m The conditions: 40 MHz collision rate system clock 1 bunch crossing in 25 ns 1.1 MHz Readout B-hadron productionrate 75 kHz readout 10 kRad

6 Dirk Wiedner How do we meet the specs? 350 m 2 of Straw detectors, 114 m 2 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

7 Dirk Wiedner Straw Outer Tracker

8 Dirk Wiedner Straw Detector Production

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

10 Dirk Wiedner Quater Station

11 Dirk Wiedner Straw Readout Electronics Preamp TDC Preamp TDC Preamp TDC Preamp TDC optical Transmitte r board Frontendbox Readout board optical Receiver board Switch PC optical Receiver board straw modul 128 channels

12 Dirk Wiedner Readout window TDC (OTIS) TDC = Time to Digital Converter LHC clock (40 MHz) Signal from Preamp T coded 2+6 Bit Readout 32 channels One Timebin corresponds 25 ns / ps Time always in respect to interaction time (LHC time) Readout window: 75 ns

13 Dirk Wiedner optical Transmitter board 1.6 Gbit/s throughput 1 fiber per straw module Distribution of Fast- and Slow Control Jitterfilter ( 7ps RMS) Low voltage regulators

14 Dirk Wiedner optical Receiver board 12 optical inputs 19,2 Gbit/s Part of LHCb readout board(TELL1) 288 parallel electrical outputs Bit error rate <

15 Dirk Wiedner The Test: 4 Modules from the production final electronics

16 Dirk Wiedner The Proof resolution [μm] 200 μm

17 Dirk Wiedner Summary 68 m 2 (60%) of straw modules produced in Heidelberg TDC and optical readout electronics developed in Heidelberg 200 μm resolution well surpassed in full system test

18 Dirk Wiedner Schema optische Empf ä nger- karte PC Stratix TTC Szintillator Modul 4 I² C + Laptop Szintillator Modul 3Modul 2Modul 1 FE-Box Si- Teleskop

19 Dirk Wiedner Strahlprofil Elektronenstrahl 7GeV Strahlbreite 5cm 8 Lagen je 64 Straws ausgelesen Triggerrate 1kHz Rauschen <0.3 % Kanal

20 Dirk Wiedner Erste Teststrahlergebnisse Driftzeiten maximal 50 ns Effizienz >94% (ohne Akzeptanzkorrektur) Auflösung besser 250 µm (vorläufig) Auslesekette funktioniert von Straw bis PC ns

21 Dirk Wiedner Vorverst ä rker ASDBLR (ATLAS DEMILL) Vorverst ä rker mit ca. 12 ns Integrationszeit 2x 8 Kan ä le pro Karte

22 Dirk Wiedner Linearit ä tsmessung Hit Delay [ns] Drifttime [binary]

23 Dirk Wiedner Frontendbox optische Senderkarte TDC Karten Vorverst ä rker Wasserk ü hlung Leistungaufnahme 20W

24 Dirk Wiedner Auslesekarte/L1-Buffer Daten von 24 Halbmodulen LHCb-weiter Standard Aufgaben: Deserialisierung Synchronisation Prozessierung Speicher (60 ms = 65k Ereignisse) Ethernet Datenausgabe zu L1- Trigger und DAQ