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PROJECT : IceCube Digital Optical Module Production at DESY Zeuthen

PROJECT : IceCube Digital Optical Module Production at DESY Zeuthen. IceCube Status November 2004. The Experiment. - 80 Strings - 4800 PMT - Instrumented volume: 1 km 3 - Installation: 2004-2010. IceCube. AMANDA system. AMANDA and IceCube Drills.

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PROJECT : IceCube Digital Optical Module Production at DESY Zeuthen

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  1. PROJECT : IceCube Digital Optical Module Productionat DESY Zeuthen Rolf Nahnhauer

  2. IceCube StatusNovember 2004 Rolf Nahnhauer

  3. The Experiment - 80 Strings- 4800 PMT - Instrumented volume: 1 km3 - Installation: 2004-2010 Rolf Nahnhauer

  4. IceCube AMANDA system AMANDA and IceCube Drills AMANDA IceCube Power consum. 2 MW 5MW Time to 2400 m 120-140 h 35-40 h Fuel (gal/hole) 10000-12000 7000-8000 Set-up time 5 – 6 weeks 18-25 d • Goal: • 18 holes/season • 2450 m deep • straight within 1m • quality logged Rolf Nahnhauer

  5. Hose-reel atSouth Pole (Jan 2004) Hose-reel with hose,built at Physical Sciences Laboratory UW-Madison (Nov 2003) Rolf Nahnhauer

  6. In-Door Deployment System to be set up at South Pole in November –December 2004 First hole to be drilled : January 2005 Mounting, testing + drop of string with 60 OMs expected to take ~ 20 hours Rolf Nahnhauer

  7. IceCube Deployment scheme • Amanda now runs with TWR • data similar in structure to IceCube • work on a s/w trigger • Position of 1st IceCube strings • as close to Amanda as possible • for verification & cross-calibration • … but logistics and • safety requirements • 1st IceCube strings: Amanda as calibration device • IceCube ~ 20 strings + Amanda: powerful combined detector • Full IceCube: Amanda included as a fully integrated, • low threshold subdetector CONTINUOUS SCIENCE OUTPUT DURING CONSTRUCTION Rolf Nahnhauer

  8. Production schedule Numbers from February 2004 – slightly changing with timeBaseline change: 80 strings  70 strings + 10 strings from contingency Rolf Nahnhauer

  9. All Production sites successfully participated in the shipment of good DOMs to the Pole (integration and FAT) Anticipate total of 280 DOMs shipped by end of Nov, 2004. Current total is 248. Good team established which lays the groundwork for further DOM production success PY3 DOM Production Summary Production readiness review 17.11.2004Jim Haugen (Production manager) : Rolf Nahnhauer

  10. Integrated DOM Rolf Nahnhauer

  11. Integration procedures Following docs are ready for signoff : Production sides got certified in May 2004 by US team from Project office Rolf Nahnhauer

  12. PY3 DOM shipment summary , but available A : IceTop DOMT : terminated DOMU : unterminated DOM Rolf Nahnhauer

  13. PY4 DOM Production Plan Rolf Nahnhauer

  14. DOM Production and Testing at DESY Rolf Nahnhauer

  15. - Produce 1300 DOM’s in 5 years • Test all DOM’s in Dark Freezer at -40 C • Ship necessary number of DOM’s per year to South Pole Rolf Nahnhauer

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  20. 1st Produktion End of February: First 2 kits of electronic boardsarrived at Zeuthen 1.3.2004 : First DOMproduced at DESY Rolf Nahnhauer

  21. 2nd Produktion 6 kits of electronic boards (DOM rev4.2) arrived in Zeuthen beginning of May Started test production of 6 complete modules immediately  tested technology and production chain  trained technicians All 6 DOM’s produced successfully in foreseen time After 6 months DOM’s still in very good shape (gel) Tests limited due to old revision of main boards (software compatibility) Rolf Nahnhauer

  22. 3rd Produktion Plan from March 2004 : Produce and test 60 DOM’s in July-August-September 2004 Needs special preparation : more jigs for gel pouring (+3) got +1 mid of August 60 DOM’s pre-potted 1.9. DOM-mainboards are expected to arrive only at end of July  10 +15 arrived 23.8. 30.8. 35 DOM’s should go to South Pole (testing finished at 9/20) 25 DOM’s ready for testing at 16.9. testing finished 5.10. shipping done 27.10. Rolf Nahnhauer

  23. 3rd Produktion Got 9+7+6 mainboards:  23.10.,30.10.,7.11.  all used for completion of pre- potted modules Got request to start second DFL test at the 4th of November Have now still 6 complete DOM’s + 9 pre-potted DOM’s in store Final 9 mainboards are promised to arrive in the next days Rolf Nahnhauer

  24. DFL Testing Testing system for 2004 will not be fully automatised Light source 405 nm available and tested Light source for lower wavelength under study(nitrogen laser? +splitter? + dyes?) Ligth distribution system under development (DESY+Mainz)(2 test channels available) DOM trigger (external trigger signal + optical monitor)planned to be build (DESY+Mainz) DFL electrical cabling to be done worked much better than expected in March 2004 Rolf Nahnhauer

  25. DFL Testing Final Acceptance Test (FAT) : US system completely copied in Sweden and Germany Works mainly computer steered Uses 3 light sources (laser, W-lamp+monochromator, LED) Light distribution per glass fiber bundle About 12 hours of data taking per cycle Full test ~ 14 days, cycles at +20, -45, -20, +20, -45, +20 degrees Rolf Nahnhauer

  26. DESY FAT1 • 25 DOMs in DFL • 1 DOM HUB • 8 DOR Cards • 1 filter box • 4 breakout boxes • Light system • Laser • W-Lamp + monochromator • LED • Fiber system Rolf Nahnhauer

  27. Test schedule • All this tests are done for: +20˚C, -45˚C, -20˚C, +25˚C, -45˚C, -25˚C, +20˚C • For more details: • www.ifh.de/~tarasova/work/FAT1/DESY_status.html Rolf Nahnhauer

  28. Reboot: No problem at room temperature • Only one communication failure at low temperature • Simple Test Framework (STF): • Few problems at room temperature • More failures at low temperature • Mainly flasher brightness, width, pmt HV ramp, stability +20 -45 Rolf Nahnhauer

  29. RESULTS of DESY FAT1+FAT2 Failed due to gel inspection 9,25,34 Rolf Nahnhauer

  30. Production Quality at DESY 1+6 Test-DOM’s : all fine 25 DOM’s from FAT1: 1 reboot failure 3 gel failures 21 DOM’s from FAT2: 1 flasher board failure 13 gel failures ! Hard- and software design ok Unsolved : gel problem, similar result in Sweden, different in US Most probable reason: too early pre-potting before sealing specific for irregular production in 2004 Rolf Nahnhauer

  31. Production schedule 2005 Rolf Nahnhauer

  32. Production  2004 Regular production was impossible due to deliveryproblems of mainboards from the US Nevertheless 280 DOM’s for the deployment of four strings are produced, successfully tested and shipped All but one production steps under control Only unsolved problem: gel behaviour  needs further studies DOM testing went much better than expected Improvement of testing equipment under study Rolf Nahnhauer

  33. Production 2005 - 2008 - Start up problems hopefully overcome - Producers well trained - Production capacity sufficient - Logistic proven - Customs problems “solved”  but depend all the time strongly on delivery of components from outside Rolf Nahnhauer

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