String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.
-
Upload
mavis-jefferson -
Category
Documents
-
view
218 -
download
0
Transcript of String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.
![Page 1: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/1.jpg)
String mechanics and
production
P.Kooijman,NIKHEF/UU
Pylos, april 2007
![Page 2: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/2.jpg)
How do we get signals out of sphere
• For readout to work need single optical channel connection between shore and OM
• Cable with 1 or 2 fibres per OM
• 2 copper per OM
• Need breakout at each OM
![Page 3: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/3.jpg)
Solution being investigated
• Seacon equipresure “hose-cable”• Routinely used• Pressure insensitive fiber!!• Connectors and feedthroughs relatively cheap
![Page 4: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/4.jpg)
Design is flexible (more ways)
• Only small area where pressure needs to be held
• Cable is a tube filled with oil and whatever you want (gets bigger with more content)
duct-hose
optical/electrical contact block
(vulcanized rubber)
fibrecopper
twisted pair inert oilany combination
![Page 5: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/5.jpg)
So how do we use it
Thin structures filled with oil
Hose with 2 fibers and two coppers
Small hose connector
Pressure resistant connectorAnd bulkhead
hoseconnectors
Hose with many fibers
cable
![Page 6: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/6.jpg)
What else?
• At bottom of line we need container for DWDM• After that can continue again with just 2 fibers• Much cheaper (less expensive solution) at
junction box
Wet mateable copper only (2)
Wet mateable fiber only (2)
Splitter equipressure
Hose connectors
Pressure feedthrough connector many fibers
DWDMJB
100mToOM
1km
![Page 7: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/7.jpg)
Price?
• Dont know yet – but estimates come in at around k€ 11 for a floor with OM with 38 PMs including cable
• Only one end of interlink is wet mateable – no non-destructive recovery
• Split fiber and copper in wet mateable – lose very expensive connectors
• Sofar saving of about factor 2 per unit looks feasible
![Page 8: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/8.jpg)
So how do we build 500 strings in 5 years?
• 5 sites
• 500 strings
• 5 years
20 strings/site/year (1/fortnight)20 strings/site/year (1/fortnight)
400 OMs/site/year (10/week)400 OMs/site/year (10/week)
16000 PMTs/site/year (400/week)16000 PMTs/site/year (400/week)
![Page 9: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/9.jpg)
Delivery
• 2000 glass spheres per year
• 80000 PMTs per year
• 100 500m cables with connectors fibres etc per year
Delivery of tested entities
![Page 10: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/10.jpg)
test report
PMT
PMTassembly
characterizestorage /transport
assembledPMT-base
OM assembly
characterize
connector
mechanics
central electronics
STRINGassembly
characterize
test report
test report
storage /transport
storage /transport
cable
mechanics
assembledbottom
instrumentation instrumentationinstrumentation
Assembly line
![Page 11: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/11.jpg)
And of course
• Transport to the site
• Deployment at the site at rate of 2/week• Deploy in containers
• Maybe more “daisy-chained” together (6?? With just 1 underwater connection)
![Page 12: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/12.jpg)
Conclusions
• Cable with breakout and connector to sphere – OM can be separately built and tested – complete system test because of single connection from shore to OM
• Cable looks to be possible with OM supports and breakouts
• First look at production looks tough but never say never
• Needs significant organisation and delivery streamlining
![Page 13: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/13.jpg)
PS
500 strings = 200 M € = 40 Antares = 2km3
![Page 14: String mechanics and production P.Kooijman,NIKHEF/UU Pylos, april 2007.](https://reader034.fdocuments.us/reader034/viewer/2022051401/56649ef55503460f94c08b76/html5/thumbnails/14.jpg)
Where did we save/lose money
• 38 pmt (8kEuro) vs 4 10” (6kEuro) X20• 1sphere(0.5kEuro) vs 4spheres (2kEuro) X20• Modulator + SER+DES (2kEuro) vs (0) X20• No (0 kEuro) vs 1 Ti cylinder (10kEuro) X20• Connectors (1kEuro) vs (5kEuro) X20• No connection at stringbottom (15kEuro)X1• Connectors to JB (5kEuro) vs (15kEuro) X1