Enclosures for the RPC Link Boards Outline Introduction

Enclosures for the RPC Link Boards Outline • Introduction • Periphery • General • Services • Components, materials • Manufacture, Assembly • Installation • Prototypes, Tests • RE 1/1 • General • Services • Assembly • Components, materials • Installation H. Katajisto RE EDR 10/10/02

Introduction • Link Board, LB, (electronics card) is a link between chamber and counting room • Box provides mechanical support for the LB • Box offers means for cable routing and mounting • Box offers cable strain relief • LB replacement during maintenance possible • Box includes individual cooling system • Box provides electro-magnetic shield • Box meets safety requirements • Several LBs are grouped in to the same box • 2 different electronic box designs H. Katajisto RE EDR 10/10/02

General, Periphery design • Covers RE 1/2, 3 & RE 2 & RE 3 & RE 4 • Design is derived from: -available space and maintenance requirements -signal cable characteristics (max 12 m cable length) -symmetry of CMS -number and size of cables and connectors -electronics heat dissipation • Design consists: -max 16 LBs & 2 Control Boards, CB, per box -size of the LB (and CB) 237 x 160 mm -size of the box 400 x 300 mm -number of boxes 48 H. Katajisto RE EDR 10/10/02

Services, Periphery design • Cooling -Power dissipated per LB 10 W -> per box 180 W -Box includes individual cooling system made of copper -Heat transfer based on radiation and convection -Cooling pipe ID/OD 6/8 mm, flow rate 2 l/min, pressure drop < 1 bar H. Katajisto RE EDR 10/10/02

Services, Periphery design • Electrical and optical cabling -max 115 cables are routed from the back side of the box -cables & fibres are routed as round, connectors ready assembled -box is equipped with an Al sealing transit frame -Transit units are made of rubber -Transit units can handle various cable diameters -max 16 cables & 24 fibres are routed from the front side H. Katajisto RE EDR 10/10/02

Services, Periphery design • Back plane solution -is constructed on a standalone LB frame -provides cross-connection between RPC cables and LB -provides cross-connection between LB - CB -provides connection for LV H. Katajisto RE EDR 10/10/02

Components, materials, Periphery design • • Al box Plastic attachment units Copper cooling assembly Al LB frame Plastic/copper connectors Al/brass cable & fibre frame Al/EPDM rubber sealing transit units • Mass 30 kg H. Katajisto RE EDR 10/10/02

Manufacture, Assembly, Periphery design H. Katajisto RE EDR 10/10/02

Manufacture, Assembly, Periphery design H. Katajisto RE EDR 10/10/02

Installation, Periphery design H. Katajisto RE EDR 10/10/02

Prototypes, Tests, Periphery design H. Katajisto RE EDR 10/10/02

General, RE 1/1 design • Design is derived from: -extreme space limitations for the box size -number and size of cables and connectors -location of services -space for the services • Design consists: -6 LBs & 1 Control Boards, CB, per box -size of the LB (and CB) 245 x 120 mm (differs from periphery design) -size of the box 298 x 161 mm -number of boxes 12 H. Katajisto RE EDR 10/10/02

Services, RE 1/1 design • Cooling -Power dissipated per LB 10 W -> per box 70 W -Cooling pipe ID/OD 6/8 mm, flow rate 2 l/min, pressure drop < 1 bar H. Katajisto RE EDR 10/10/02

Services, RE 1/1 design • Electrical and optical cabling -62 cables & 12 fibres are routed from the back side of the box -Cable OD limited to 11. 5 mm -Cable max diameter at the point where it is routed inside 8 mm -cables & fibres are routed as round, connectors ready assembled -box is equipped with an Al sealing transit frame -Transit units are made of rubber H. Katajisto RE EDR 10/10/02

Services, RE 1/1 design • Back plane solution -is constructed on a standalone LB frame H. Katajisto RE EDR 10/10/02

Services, RE 1/1 design • Back plane solution -provides cross-connection between *RPC – LB *I 2 C – CB *CB – DCS *LB – CSC *MLB – SLB *LB – CB * LV – LB&CB H. Katajisto RE EDR 10/10/02

Assembly, RE 1/1 • Cooling system and LB frame assembled first • This sub-assembly is installed into the box H. Katajisto RE EDR 10/10/02

Components, materials, RE 1/1 design • Basically same materials as in periphery design H. Katajisto RE EDR 10/10/02

Installation, RE 1/1 design H. Katajisto RE EDR 10/10/02