9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 1/19 Outer Tracker Module Production at NIKHEF Produced 60 modules  Production Progress  Quality Assurance

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 2/19 Module Production at NIKHEF Courtesy of Jan Spelt

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 3/19 50% Milestone met 15/05/2003: EDR (Engineering Design Review) 02/2004: 10% prod. 04/2004: EDR (Electronics Design Review) 05/2004: PRR (Production Readiness Review) 03/2005: 50% prod. 12/2005: 100% prod

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 4/19 Module Production at NIKHEF (1) ModuleDateLogbook 0AprilGas Tightness 1MayCurved panels discovered 2-3JuneSelf-sustained currents 4JulyChanged to Ar/CO 2 70/30 5JulyDiscovered bad wire quality 6-8AugustOK 9AugustChanged threshold HV in air 20  100 nA 10-15SeptemberOK 16OctoberSecond team of (Russian) technicians started 17-18OctoberOK 19OctoberObserved loose soldering connections 20OctoberOK 21NovemberDouble glue on side walls 22-25NovemberOK 26-30NovemberLow response on 1side 29NovemberBad wire quality in HV in air, and tripping Sr scan 30DecemberBad wire quality in HV in air, and tripping HV in gas 31DecemberBeing build today 32NovemberPanel glueing with ropes Poor man’s logbook

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 5/19 Module Production at NIKHEF (2) ModuleDateLogbook 32-38DecemberOK 39JanuaryUse 90 Sr point source 40-48JanuaryOK 49-57FebruaryOK 58March4 broken wires 59-60MarchOK Poor man’s logbook

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 6/19 Module Production at NIKHEF (3) Production process: some minor problems:  Watch glue on connectors  Module 58: 4 broken wires  Module 59: peculiar wire response

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 7/19 Glue on Connector (1) Traces of glue. Affects leakage current for wires 1 and 64 (~20-100nA)

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 8/19 Glue on Connector (2) Traces of glue. Affects leakage current for wires 1 and 64 (~20-100nA) Discovered on Heidelberg modules 21 and 22 8 channels with high currents (10 – 270 nA) Checked at NIKHEF: found 6 wires 64L: M16A M19A M26A 1L: M20A M26A M41B Investigated influence of humidity on M16 and M19: 1)measure current after production; 2)measure current after drying; 3)put module in cold, wet environment (= outside); 4)measure current; 5)scratch of glue; 6)measure current. After production DryingCoolingHumidityScratching Date26/10/200416/02/ /02/2005 Time10:0016:0010:0017:00 M16A, ch 64L 7 nA0.5 nA5 nA15 nA0.2 nA M19A, ch 64L 8 nA0.3 nA23 nA1.9 nA0.1 nA

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 9/19 Broken wires in Mod 58 Discovered 4 broken wires in Mod 58 History:  23 Feb Wired full panel  24 Feb 50U broken  01 Mar 60U broken, just before gluing module  04 Mar 56U short circuit  07 Mar 55U short circuit after shaking the module Hypothesis:  Middle print tilted ? ?

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 10/19 Selection of 10% spares We foresee 10% spares Which ones would we select as spares? How many bad channels are we left with?

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 11/19 Quality Criteria Not used in quality criteria now:  HV in air : correlated to the 90 Sr numbers  HV training : correlated to the 90 Sr numbers  Wire Tension: OK. Ignore modules 5012 and 0…  Consider only modules 1-60 Number of bad wires from 90 Sr scan. Define bad:  Low response: <15% on average Typically disconnected due to tripping HV supply  High response: >15% on average Typically noisy  High response: >100% at any place on the wire Spikes Self-sustained currents Missing wire locators

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 12/19 Module Data (1)

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 13/19 Module Data (2)

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 14/19 Module Data (3) Module 60 about to be scanned… Just found peculiar wire in Mod 59:  Low current, then self-sustained current  Being investigated  90 Sr source Position  Current Wire locator position

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 15/19 Module Selection NMod<15%>15%>100%TotalComment “Disconnected”“Noisy”“Suspicious” Self-sustained currents Bad wire Bad wire Broken wires The rest77317 Out of 55*256 channels = 1.2‰ Selection of 6 worst modules:

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 16/19 The worst modules from the rest… Probably module 16, 26 or 30: NMod<15%>15%>100%TotalComment Rest54211 Out of 55*256 channels = 0.8‰

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 17/19 Special Tests Weighing all panel and module components  Calculate X/X 0 Survey of module flatness  Requirement: dZ < +/- 500 um  Result: dZ < +/- 400 um Humidity of modules  Compare in-leak between leaky and gas-tight module  Confirm gas-tightness requirements see Peter LHCb in preparation LHCb

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 18/19 Summary Production:  Only minor changes in production process Only minor changes in production process  Satisfactory production speed Satisfactory production speed Wire quality very good now Gas tightness OK, with occasional leaky exceptions 17 bad channels in best 90% of the modules = 1.2 ‰ 11 bad channels in best 85% of the modules = 0.8 ‰

9 March 2005OT Meeting - LHCb week - Production and QA, Niels Tuning 19/19 References LHCb week September 2004, Chia  Scan of 4 Warsaw modules Scan of 4 Warsaw modules  NIKHEF – Results Mod 0-10 NIKHEF – Results Mod 0-10 LHCb week December 2004, CERN  NIKHEF - Module glueing, Connector soldering NIKHEF - Module glueing, Connector soldering OT meeting February 2005, Warsaw  NIKHEF - Module selection 1-50 NIKHEF - Module selection 1-50 All quality plots for each module can be found here: /