Optical Fibres for the LHC Machine and Experimental

Areas

Optical Fibre Meeting3 October 2002

Luit Koert de Jonge/ST-EL-OF

ST-EL-OF / L K de Jonge 2

Agenda

The Optical Network PolicyThe Optical Network STAR pointsTechnologyInstallationContractWhat we require from YOUQuestions

ST-EL-OF / L K de Jonge 3

The optical network policy

The CERN Optical Network is built of Optical Trunks connecting STAR points

IT and ST plan the Optical Network together The optical fibres in and between STAR

points are managed and allocated by IT-CS Individual fibre usage (dark fibres) out of a

STAR point is handled by ST-EL Users shall use the IT-CS IP/Ethernet

Network for all their Communications needs

ST-EL-OF / L K de Jonge 4

The main surface STAR points

TCR

513 PCR

BA5

24m+192s

24m+192s

24m+192s

24m+48s

24m+48s

48m+96s

48m+144s

36m+144s

24m+24s

PS 354

Main

SM18

BA7

BA2

24m+24s

BA1

BA6

12m+12s

5848m+96s

P8

48m+96s

Geneva Airport

48m+96s

BA4CNGSMeyrin

France

CERN CCC

LHC LHC

Y

Y

LHC

P2

SR1

P6

P7

P5

P4

PZ33

UJ32

TZ32P32

TZ76UJ76“LAME VIBRANTE”

To lay the HDPE ducts P32-PZ33

ST-EL-OF / L K de Jonge 5

The “Lame Vibrante” at work

The machine advanced at a speed of about 60 cm per minute and left a clean field behind.One must of course be absolutely sure that no obstacles, like water supplies or electrical cables are on its way.

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Optical fibre cabling SURFACE

SURFACE TO UNDERGROUND (SHAFTS)

TUNNEL

BEAM INSTRUMENTATION

EXPERIMENTAL AREAS

ST-EL-OF / L K de Jonge 7

Surface optical links from PCR

Sites 1, 5, 6, 7, 8, 513 and CNGS OK

Sites 2, 32, 33 and 4 to be done

Old HDPE ducts to above sites in bad state– they are in place since 1986– ducts to P6 had (have) to be replaced– ducts to P8 had to be repaired at several spots

Blowing of cables difficult/impossible

ST-EL-OF / L K de Jonge 8

Optical cabling with tube systems

Install (blow) guide tubes (low cost)

Blow mini optical cables on demand

Modular and Flexible

Lower initial cost

Easy to replace cables

Outdoor resistant

ST-EL-OF / L K de Jonge 9

Blowing of guide tubes

ST-EL-OF / L K de Jonge 10

Blowing of mini optical fibre cables

This Micro-Jet can blow mini optical fibre cables with(1- 72) fibres.

Size of an A4 sheet and 10 cm high.

Several units can be cascaded. Blowing pressure is 10 Bar.

Micro-Jet from Plumettaz/CHMicro-Jet from Plumettaz/CH

ST-EL-OF / L K de Jonge 11

Surface ducts with guide tubes

Ø 40/50 mm duct

7 x Ø 10 mm guide tubes

Capacity 7 x 72=504 optical fibres

Ø 32/40 mm duct

5 x Ø 10 mm guide tubes

Capacity 5 x 72=360 optical fibres

ST-EL-OF / L K de Jonge 12

3 ducts types with guide tubes

Ø 25 mm duct with 7 x Ø 7 mm guide tubes

Capacity 7 x 24=168 optical fibres

Ø 40 mm duct with 10 x Ø 7 mm guide tubes

10 x 24=240 optical fibres

Guide tubes replaceable (change size)

Ø 18 mm duct with 3 x Ø 7 mm guide tubes

Capacity 3 x 24=72 optical fibres

ST-EL-OF / L K de Jonge 13

Installation principles

Ø 40 mm duct with 10 guide tubes between SR and US/UJ

Ø 40 mm duct in the LHC tunnel with stops at US/UJ and partial stops at the alcoves RE– duct fixed together with leaky feeder cable to tunnel

wall Ø 25 mm duct for SL-BI and medium installations Ø 18 mm duct for low capacity installations Once the above infrastructure is in place, the

mini optical cables can be blown The tunnel fibres must be replaceable in case of

radiation damage

ST-EL-OF / L K de Jonge 14

Radiation measurements (RADWG)

Measurements of optical cable (multimode and single-mode fibre)

0.1

1

10

100

1000

Dose [Gy]

Days

Attenuation [dB / Km]MM 850 nm

Attenuation [dB / Km]MM 1300 nm

Attenuation [dB / Km]SM 1310 nm

Attenuation [dB / Km]SM 1550 nm

ST-EL-OF / L K de Jonge 15

OTDR OTAU

NTE NTE

Optical Test Access Unit

RTU Remote Test UnitRTU Remote Test UnitCable under test

Optical Time Domain Reflecto meter

CERN intranet

SNMPWEB Client

Internet

System Management

Network terminal

to othercables under

test

Fibre monitoring system “ATLAS”

ST-EL-OF / L K de Jonge 16

Mini optical fibre cables

Single-mode G.652.B 9/125 optical fibres– 4 – 8 (6) – 12– 24– 48 (60) (72)

Multimode G.651 50/125 optical fibres– 6– 12– 24

ST-EL-OF / L K de Jonge 17

Optical terminations in STAR points

Single-mode G.652.B 9/125 optical fibres are terminated with E-2000/APC (8)

Multimode G.651 50/125 optical fibres are terminated with ST-HQ connectors

Other optical connectors are possible SC or LC

ST-EL-OF / L K de Jonge 18

Optical termination equipment

Fibre port 3 (4)U 19” frame for max. 144 fibres

ST-EL-OF / L K de Jonge 19

Fibre frame 1U 19”for max. 24 fibres

Optical termination equipment

ST-EL-OF / L K de Jonge 20

Optical patch cords

Very large quantities of various optical patch cords will be required

The Market Survey indicated 10’000 We must know from you what you

want and how many you want Any patch cord type is possible

ST-EL-OF / L K de Jonge 21

Optical fibre management

With such a dense optical network, we need to manage it

We are actually studying ways how to integrate our data into a common data base which should be linked to geographical information

We want make make use of the existing geographical information systems (GIS) and databases

ST-EL-OF / L K de Jonge 22

Presentation from STAR INFORMATICS

le 9 octobre 2002 à 14h30Amphithéâtre SL – Bâtiment 864 – Site de Prévessin

 

 

AGENDA 14h30 Accueil et introduction

Michel Mayoud, Chef du Groupe EST-SU 14h45 Présentation du Système d’Informations Géographiques du CERN et de ses applications

Bernard Guyot EST-SU/TOP 15h30 Pause 15h45 Présentation des applications spécialisées dans la gestion des réseaux de distribution, ainsi que dans le domaine de la gestion des chantiers et du suivi d’une flotte de véhicule de STAR INFORMATICS

Philippe Berle de STAR France 16h45 Fin de la présentation 

ST-EL-OF / L K de Jonge 23

To resume

Market Survey MS-3120/ST/LHC– Supply, Installation, Test and Commissioning

of Optical Fibre Cabling Systems for LHC

CERN’s preference for tube systemsReceived 12 replies6 or 7 Companies will be selectedTender IT-3120/ST/LHC - FC June 2003Contract with unit pricesUsers get what they payFirst installations September 2003

Optical Fibres for the LHC Machine and Experimental

Areas

Now we must getyour requirements!

QUESTIONS? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

Luit Koert de Jonge/ST-EL-OF