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April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 1
IceCube Digital Optical Module
ProductionR. Nahnhauer
DESY
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 2
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 3
DOM PRODUCTION
Production of up to 5500 Optical Modulesuntil end 2008 :
Gel mixing, filling and potting PMTs
Collar mounting and assembly of electronics
Sealing of DOMs at low pressure
DOM testing in DFL
Harness DOM with suspension
Finally pack DOMs and ship them to the pole
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 4
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
xxx
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 5
DOM Production Site Integration Status - PY5 (April, 2006 - March, 2007)
1125
1005
370399
320285
0
200
400
600
800
1000
1200
Plan integration Actual Integration Plan Integration Actual Integration Plan Integration Actual Integration
Week ending 3/31/07 (PY5 complete)
PSLDESY
Sweden
Site % to Weekly Plan % PY5 completed
PSL 89 89
DESY 108 108
Sw eden 89 89
Site Total Plan
PSL 1125
DESY 370
Sw eden 320
Final snapshot for PY5
Great job…all sites
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 6
DOM Production Site Integration Status - PY6 (April, 2007 - March, 2008)
1097
0
430
0
336
00
200
400
600
800
1000
1200
Plan integration Actual Integration Plan Integration Actual Integration Plan Integration Actual Integration
Week ending 1/24/07
PSLDESY
Sweden
Site % to Weekly Plan % PY5 completed
PSL 0 0
DESY 0 0
Sweden 0 0
Site Total Plan
PSL 1097
DESY 430
Sweden 336
Do not use this chart till April, 2007 - see PY5 charts for current PY5 informationShould be no problem to do
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 7
LBNL DOM Main Board Rev5.1C Delivery Chart
0
500
1000
1500
2000
2500
3000
11/2
4/2006
12/8
/2006
12/2
2/2006
1/5/2007
1/19/2007
2/2/2007
2/16/2007
3/2/2007
3/16/2007
3/30/2007
4/13/2007
4/27/2007
5/11/2007
5/25/2007
6/8/2007
6/22/2007
7/6/2007
7/20/2007
8/3/2007
8/17/2007
8/31/2007
9/14/2007
9/28/2007
10/1
2/2007
Week ending
Qu
an
tit
y
Cumulative boards shipped - plan all sites
Cumulative boards shipped - actual
A plug for John Joseph and LBL, good job here
DOM Main Board Production
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 8
PY Year DOMs ready at
PSL
DOMs ready in Sweden
DOMs readyat DESY
03 4/04-3/05 280 59 60
04 4/05-3/06 601 159 160
05 4/06-3/07 1005 256 400
06 4/07-3/08 1097 317 430
07 4/08-3/09 ~200 ~185 ~200
DOM integration will finish 7/08 to 11/08
decision how many DOMs for how many stringshave to be produced, will come in May 2007
DOM Production in Total
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 9
Components for Final Production IceCube DOM Production CY2004 - CY2008 for 80 strings installed
0
10
20
30
40
50
60
70
80
90
24.0
7.20
04
24.0
9.20
04
24.1
1.20
04
24.0
1.20
05
24.0
3.20
05
24.0
5.20
05
24.0
7.20
05
24.0
9.20
05
24.1
1.20
05
24.0
1.20
06
24.0
3.20
06
24.0
5.20
06
24.0
7.20
06
24.0
9.20
06
24.1
1.20
06
24.0
1.20
07
24.0
3.20
07
24.0
5.20
07
24.0
7.20
07
24.0
9.20
07
24.1
1.20
07
24.0
1.20
08
24.0
3.20
08
24.0
5.20
08
24.0
7.20
08
Week ending
Qu
anti
ty o
f st
rin
gs
read
y fo
r in
stal
l
Block 1
Block 2
Block 3
Final Integrated DOM PRR (early June 2006)
PMTs, spheres ordered - qty 1200
Place orders for main board, HV suite, flasher board, delay board, penetrator assembly, harness, etc - qty 1200, Block 3A
Block 3 Design freeze
qty = 1200, 3AStrings installed in ice at Pole
Known major changes between Blocks 2 and 3:1. CAEN supplied HV control board2. Toroid on HV base3. Pigtail and Harwin connector on penetrator assembly
DOM Subsystem Final Design Verification and CDR - best case: good to order 3600 units, must order 1200 min. Aug 29 - 30
qty = 2400, 3B
qty = 700, 3C to 80 strings
Block 3A readiness review, March 2006
Must order last 700 units to continue to 80 strings Feb, 2008
Must order Block 3B 2400 units to continue uninterrupted in Nov, 2006
Note: this plan reduces quantity of DOMs to ship to the Pole in CY2006 from 16+ to 14+ to accommodate later production start
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 10
DOM TESTING
3 MDFL at PSL
1 DFL at DESY
1 DFL in Uppsala
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 11
DOM Testing RequirementsElectronic and optical requirements
Reboot- and communication over a wide temperature rangefrom +20°C to -45°C (or -55°C for ice-top DOMs)
Single photo electron detection
Wide dynamic signal range – capable to handle large light pulses with up to several 1000 photo electrons per microsecond
ime resolution better than 5ns for single photo electron pulses
High voltage calibration of the PMT better than 5%
Optical sensitivity within low variations for different DOMs
Dark noise rates less than 1kHz in ice
Mechanical requirementsVibration and pressure fluctuation during transport
Rapid temperature variations from +20°C to -45°C
Very high environment pressure up to 650 bar
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 12
DOMPASSPORT
Main Page
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 13
DOM Passport - Example Pages
Dark Noise Optical Sensitivity
Time Resolution
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 14
DOM Production Site DFL test Status - (Jan, 2007 - Sep, 2007)
0
50
100
150
200
250
300
350
Plan cumulative DFL loaded Actual loaded Plan cumulative DFL loaded Actual loaded Plan cumulative DFL loaded Actual loaded
Week ending 3/31/07
PSLDESY
Sweden
Site % to Weekly Plan % PY5 completed
PSL 82 28
DESY 139 52
Sw eden 138 69
Site Total Plan
PSL 858
DESY 280
Sw eden 240
This is the DFL load plan to support shipping 1300 DOMs to Pole in CY2007
2007 is also starting out good
FAT Status Snapshot in 2006
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 15
2007 DOM Testing example (DESY)time load good bad FAT
FAT16 29.01-14.02 57 50 7 0.88
FAT17 28.02-17.03 57 49 8 0.86
FAT18 22.03-11.04 34 31 3 0.91
FAT 16
Passed
STF
FB
Dark Rates
Comm/other
Gel
FAT 17
Passed
STF
FB
Dark Rates
Comm/other
Gel
FAT16 FAT17
No dominant error source could be identified in FATsDifferent small problems appeared for all FATs at all sites
Only ~1% of DOMs are cannibalized – goal was 5% or betterGood components are used in next years production
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 16
DOM SHIPPING
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 17
CY2006 DOM Ship to the Pole - Plan vs. Actual
0
200
400
600
800
1000
1200
Week ending
DO
M Q
ua
nti
ty
PSL Plan
DESY Plan
Sweden Plan
Cumulative Plan Shipped
Cumulative Actual Shipped
Awesome!
After 06/07 season: 200 DOMs at Pole 256 DOMs at McM
957 vs plan of 900
DOM Shipping 2006
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 18
DOM Shipping 2007
CY2007 DOM Ship to the Pole - Plan vs. Actual
0
200
400
600
800
1000
1200
1400
Week ending
DO
M Q
ua
nti
ty
PSL Plan
DESY Plan
Sweden Plan
Cumulative Plan Shipped
Cumulative Actual Shipped
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 19
DOM Quality in the IceDarkNoise (w/ deadtime) rates by DOM nationality
0
100
200
300
400
500
600
700
1400 1600 1800 2000 2200 2400Depth (m)
Rate (Hz)
Swedish DOMs
USA DOMs
German DOMs
LC Rates by DOM nationality
0
2
4
6
8
10
12
14
16
18
1400 1600 1800 2000 2200 2400Depth (m)
LC Rate (Hz)
Swedish DOMs
USA DOMs
German DOMs
DOMs from all production sites show same behaviour in the ice ☺
April 26, 2007 Rolf Nahnhauer IceCube Spring Meeting 20
SummaryDOM mass production is running without problems
Production teams well trained
Delivery of components mostly smooth
Many small problems contribute to test failure rate
Total failure rate after rework sufficiently small (better than expected)
All sites well prepared for continuous mass production until autumn 2008