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PROJECT :
IceCube Digital Optical Module Productionat DESY Zeuthen
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IceCube StatusNovember 2004
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- 80 Strings- 4800 PMT - Instrumented volume: 1 km3
- Installation: 2004-2010
The Experiment
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AMANDA system IceCube
Goal: 18 holes/season 2450 m deep straight within 1m quality logged
Goal: 18 holes/season 2450 m deep straight within 1m quality logged
AMANDA IceCubePower consum. 2 MW 5MWTime to 2400 m 120-140 h 35-40 hFuel (gal/hole) 10000-12000 7000-8000 Set-up time 5 – 6 weeks 18-25 d
AMANDA IceCubePower consum. 2 MW 5MWTime to 2400 m 120-140 h 35-40 hFuel (gal/hole) 10000-12000 7000-8000 Set-up time 5 – 6 weeks 18-25 d
AMANDA and IceCube Drills
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Hose-reel atSouth Pole (Jan 2004)
Hose-reel with hose,built at Physical Sciences Laboratory
UW-Madison (Nov 2003)
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In-Door deployment
DOM Hub
Cable Winch
Slip Ring
Deployment Room
Tower Operations Structure(TOS)
OMs
DAQ
Entire string can be operated as soon as the OMs are connected.
Can operate string during drop
Mounting, testing + drop of string with 60 OMs
expected to take ~ 20 hours
Mounting, testing + drop of string with 60 OMs
expected to take ~ 20 hours
System to be set up at South Pole in November –December 2004
First hole to be drilled : January 2005
System to be set up at South Pole in November –December 2004
First hole to be drilled : January 2005
In-Door Deployment
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•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
•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 CONSTRUCTIONCONTINUOUS SCIENCE OUTPUT DURING CONSTRUCTION
Position of 1st IceCube strings as close to Amanda as possible for verification & cross-calibration … but logistics and
safety requirements
IceCube Deployment scheme
Amanda now runs with TWR data similar in structure to IceCube work on a s/w trigger
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Project Year 3 4 5 6 7 8 TotalDeployment Year 04/05 05/06 06/07 07/08 08/09 09/10Drill/deploy strings 4 12 16 18 18 12 80Strings in ice 4 16 32 50 68 80 80DOMs needed 400 834 1064 1242 1182 778 5500Calendar year of prod. 2004 2005 2006 2007 2008 2009Cable systems to build 5 14 24 24 15 0 82Total DOMs: build and test 400 834 1064 0 5500DOMs: DESY 60 210 280 0 1330DOMs: Sweden 50 140 180 0 880DOMs: PSL 290 484 604 0 3290
3202
1912
780510
Production schedule
Numbers from February 2004 – slightly changing with timeBaseline change: 80 strings 70 strings + 10 strings from contingency
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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) :
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Integrated DOM
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Process doc name Doc #
Tweaks during PY3 DOM production
cycleDOM Process Traveler 9000-0025 4PMT Collar Mount 9000-0026 4PMT High Voltage Board Attach and Clean 9000-0027 2PMT Potting 9000-0028 3PC Board Assembly 9000-0029 3PC Board Mount 9000-0030 2Penetrator Install 9000-0031 3N2 Backfill and Seal 9000-0032 3DOM Harness 9000-0035 2DOM Final Pack 9000-0036 3DOM Visual Inspection Criteria 9000-0040 4
Following docs are ready for signoff :
Integration procedures
Production sides got certified in May 2004 by US team from Project office
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PY3 DOM Production Summary
0
50
100
150
200
250
300
350
400
Week ending
Qu
an
tity
Cumulative main boards shipped from LBNL
Cumulative DOMs ready for DFL - all sites
Cumulative DOMs shipped - all sites
Projection: 12 from Sweden 11/19, 20 from DESY 11/26
PY3 DOM shipment summary
A : IceTop DOMT : terminated DOMU : unterminated DOM
, but available
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PY4 DOM Production Plan
0
100
200
300
400
500
600
700
Week ending
DO
M Q
uant
ity
Ready for DFL - PSL cumul
Ready for DFL - DESY cumul
Ready for DFL - Sw ed cumul
Ship 144(5/28)
Ship 200(8/6)
Ship 200(10/1)
Ship 60(6/25)
DESY ship 80(9/17)
Ship 72(7/2)
Sw ed ship 68(10/1)
PY4 DOM Production Plan
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DOM Production and Testing at DESY
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- 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
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1st ProduktionEnd of February:
First 2 kits of electronic boardsarrived at Zeuthen
1.3.2004 :
First DOMproduced at DESY
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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)
2nd Produktion
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3rd Produktion
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.
Plan from March 2004 :
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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
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DFL TestingTesting 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 doneworked m
uch better than expected in March 2004
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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
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DESY FAT1
25 DOMs in DFL25 DOMs in DFL
1 DOM HUB1 DOM HUB
8 DOR Cards 8 DOR Cards
1 filter box1 filter box
4 breakout boxes4 breakout boxes
Light systemLight system
LaserLaser
W-Lamp + monochromatorW-Lamp + monochromator
LED LED
Fiber systemFiber system
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Basic functionalityBasic functionalityCold/Warm Reboot (+)Cold/Warm Reboot (+)Local coincidence (-/+)Local coincidence (-/+)Monitoring (+)Monitoring (+)STF Test (+)STF Test (+)Test PMT Meas. (+)Test PMT Meas. (+)
DOMCAL (+)DOMCAL (+)
TestDAQTestDAQDark Noise (+)Dark Noise (+)PMT Gain vs. HV (+)PMT Gain vs. HV (+)Linearity Test(-/+)Linearity Test(-/+)Optical Sensitivity (-/+)Optical Sensitivity (-/+)Pedestal Pattern (+)Pedestal Pattern (+)Time Resolution (-/+)Time Resolution (-/+)
Stability TestStability TestMonitoring (+/-)Monitoring (+/-)Time Resolution & (+)Time Resolution & (+)Pedestal Pattern Test (-)Pedestal Pattern Test (-)
All this tests are done for: +20˚C, -45˚C, -20˚C, +25˚C, -45˚C, -25˚C, +20˚C All this tests are done for: +20˚C, -45˚C, -20˚C, +25˚C, -45˚C, -25˚C, +20˚C
For more details: For more details:
www.ifh.de/~tarasova/work/FAT1/DESY_status.html
Test scheduleTest schedule
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--4545
+20
Simple Test Framework (STF):Simple Test Framework (STF):
Few problems at room Few problems at room temperaturetemperature
More failures at low temperatureMore failures at low temperature
Mainly flasher brightness, width, Mainly flasher brightness, width, pmt HV ramp, stabilitypmt HV ramp, stability
Reboot: No problem at room temperature
Only one communication failure at low temperature
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RESULTS of DESY FAT1+FAT2Failed due to gel inspection 9,25,34
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Production Quality at DESY
1+6 Test-DOM’s : all fine
25 DOM’s from FAT1: 1 reboot failure3 gel failures
21 DOM’s from FAT2: 1 flasher board failure13 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
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Production schedule 2005
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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
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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