1. West Wall Compressor Requirements West Wall Mezzanine Move compressors to the West Wall to distance from magnetic field Find compressor position on West Wall to meet <= 30m hose lengths Build necessary structure to support compressors & services Additional requirements Personnel access Compressor access (for installation & swap) Equipment delivery & assembly space (esp MICE Devices)

2. Compressor Line Routing Different Routing Layouts Many routes tried

3. Compressor Locations (based on hose routing) 15 x Cryomech Compressors 4 x Sumitomo Compressors Step V & VI racks Step IV racks

4. Other Features Ramp to north mezzanine Walkway over hose & cables Stairs access to south mezzanine Compressor on a scissor jack trolley

5. Equipment Delivery & Assembly Area SS in lifting position with tandem lifting frame RFCC as delivered (laid down & no RF couplings)

6. MLCR & Rack Room #2 Extended MLCR Existing locker room = Rack Room #2 2D Layout from John Webb ISIS Plant room door move (position TBD) Toilets will be removed for new ISIS switchgear (2014) New access doors Cables routed under stairs with access via Rack Room #2 (volume to be fireproofed) Existing rack room = Rack Room #1 Cables routed under false floor then into Hall (not an insignificant task!) ISIS switchgear