3 Grounding implementation at the instruments cave Grounding

3 - Grounding implementation at the instruments cave Grounding Implementation Workshop Lund, 29 th August 2018 Gabor Laszlo, Thomas Gahl

Cave is the most • • Important Flexible Sensible Complex 2

Implementation challenges /Generic issues/ • • Do we have a definition for sufficient insulation? Will be any identification (color) for every grounding zone (specially instrument sections), considering future maintenance or upgrades? Is it required insulation between cables trays and containments in the paths through the chicanes on cave and bunker shielding? How do we anchor something to the floor? 3

Implementation challenges Cave Integration for neighboring caves? How the lifting operations for components using the instrument cranes will be handle for the different grounding zones? • Is it safe to install Scaffolding, Roof ladders or Work platforms and crawler boards that accidentally can connect 2 grounding zones without any risk? • Internal isolation of sensitive and noisy components inside the cave • Crane Isolation and shared cranes? • Potential isolation issues with utilities, inside the cave, in the feed-trough and outside the cave • • – – – Power and signal cables Cooling and sprinkler pipes Vacuum and house gases HVAC Fume hoods and gaseous exhaust 4

Implementation challenges • How to isolate: • • Shielding / cave walls Building floor Utilities connections, cooling water Cable trays Access paths/stairways Vacuum hoses Beam monitors Control cabinets and racks 5

Thanks! 6