PPF1 Design

CLRC 1Jan.2003Jason Tarrant

PPF1 Design Current work

» Altering radial layout and routing through PPF1 locations to ease problems of services routing

» Design of ‘busiest’ PPF1 region, i.e Powertapes, Powertape Cooling & Optical Fibre


PPF1 Design Services routing from SCT EC to PPF1


PPF1 Design Current scheme for PPF1 P/T & Opt.Fibre

» Envelope


PPF1 Design» Requirements

– Support for up to 3 columns of 9 powertape PCBs– Support for optical fibre connections– Connector for fluid cooling– Routing for powertapes & cooling pipe & optical fibres (including

straight through alignment fibres) + restraints for services into & out of region

From http://www-f9.ijs.si/~cindro/cables/forward/pp0fz.pdf


» Close Packing of PCBs– PCB packing to achieve

minimum volume Wedge arrangement for PCBs Bond neighbouring PCBs (from

same disc) = single large PCB 3 & 2 connector long versions

of PCB

PPF1 Design


PPF1 Design 1st Concept

» Idea– Use restraints at each end of PCB to clamp both powertape and

conventional cable, then simply restrain both ends to locate PCB in desired location

» Quick prototype– Quite difficult to get them to close pack as location and angle of PCB

needs to be relatively accurate


PPF1 Design New concept

» Relatively simple PCB restraints– Slot location for rear (no tools)– Sprung location for front (where there’s easy access)– Plate for other connections (optical fibre & cooling)


PPF1 Design New Concept Continued…

» All PCBs set-up in dummy housing then tapes clipped together

» Excess tape taken up in spare space over TRT EC

Clipped furtherdown bundle

= little flexibility


PPF1 Design Excess Tape

Sample tape = 250umActual tape up to = 400um

Sample stack lightly compressed = ~18mmActual tape estimated compress = ~29mm

Actual space = 31.5mm - 1 mm for restraint box


PPF1 Design New Concept Continued…

» Cooling & Optical Fibres

Region foroptical fibre

& cooling

PPF1 Design

Documents

Transcript of PPF1 Design