1. SKA Pre Construction Phase Infrastructure Tracy Cheetham Carel van der Merwe General Manager: Infra & Site OpsInfrastructure System Engineer tcheetham@ska.ac.za carel@ska.ac.za Michelle Storey Rebecca Wheadon CSIRO SKA Executive OfficerProject Manager michelle.storey@csiro.aurebecca.wheadon@aurecongroup.com

2. Requirements Allocation

3. Construction sequence

4. Flow of Requirements

5. SE Process for INFRA

6. ICD – 3 Iterations

7. Iteration 1 (DRAFT1) –Part of Requirement Definition (by RR) –Concept Driving IF requirements Iteration 2 (DRAFT2) –Agreed ICD between INFRA and other elements –Part of Preliminary Design (Part of PDR pack) Iteration 3 (FINAL) –Signed Off at conclusion of PDR process –Formal change control for detailed design ICD – 3 Iterations

8. Vessel and Payload

9. INFRA ICDs with other elements

10. IF Lead = INFRA IF Boundaries –Array Layouts (SKA1-MID, Survey) –Dish construction Facilities –Antenna Foundations IF Types –Foundations Physical (Structural, cables) –Dish Electrical Power Budget (Electrical) –Power Backup & UPS (or not) (Reliability) –Earthing and LP –Staff requirements (ILS) ICD INFRA and DSH

11. Issues –Final Array Layouts –Loadings and Mechanical Interface –Responsibility for Bolt cage assembly (DISH?) –Power per antenna –Fibre / sleeve IF to DISH (INFRA or SaDT) –UPS for stowing (Dish or INFRA?) –Separate enclosure for Survey (RFI shielded) –Assume 10% of array can fail? ICD INFRA and DSH...

12. ICD lead = Dish - Bilateral

13. ICD Lead = LFAA / INFRA (AUS)? IF Boundaries –Array Layout –Array Foundations –On site Bunker IF Types –Physical –Antenna Electrical Power (Electrical) –Cooling –Power Backup (Reliability) –Local infrastructure ICD INFRA and LFAA

14. Issues: –Power system design –Compatible array config between DSH and LFAA –Power requirements per antenna –Solar Power –Impact on buildings ICD INFRA and LFAA....

15. Lead = Bunker, 256 racks + a few Fibre management (RF over Fibre) Integrate correlator ? Maser? MGR? In bldg 500 000 Fibres (2 per antenna) Fibre design = LFAA, who supplies? Cable buried ? Or conduit vs phase stability (MRO tests) LFAA - Bilateral

16. Solar power for each 25k antenna, Battery tech? Total 2-3 MW MRO = 80 racks (Double screen),80 single screen ICD doc LFAA-INFA

17. ICD Lead = INFRA IF Boundaries –Racks in Processing Facilities / containers –Fibre buried / cables –Fibre on Power Lines? (Physical) IF Types –Space if facilities (No racks, size) –Power & Cooling –LAN / Data Interface (Data) –Staff requirements (ILS) ICD INFRA and SaDT

18. Issues –Location of Super computer centre (RSA) –IRD or ICD for SaDT and INFRA –Use of existing Fibre links (Buried & Overhead) –IF / cut over from Integrated LAN (RSA) –Environmental Data Document (SKAO?) –Special requirements for Masers? –Telephone data responsibility? –BMS data over network ICD INFRA and SaDT.....

19. ICD Lead = CSP? IF Boundaries –Racks in Processing Facilities / containers IF Types –Racks (Qty, Space, Mass) –RFI screening –Power Type and Load –Power Usage and Backup / UPS (Reliability) –Cooling type –Cooling redundancy (Reliability) ICD INFRA and CSP

20. IF Types.... –LAN / Data interface (Data) –Access control / BMS (Functional) –Staff Requirements (ILS) Issues –250 racks for Pulsar search (RSA) –Rack requirements for LFAA/Survey (AUS) ICD INFRA and CSP.....

21. Space, Power, Cooling –Survey ~ 100kW,MID ~ 100kW, LFAA ~ 50kW –Confirm UPS requirement (AUS) –3phase AC 400V interface –P search = 1MW = 50 racks (100m distance, spigot) –Air or Liquid cooling for P search ? –AUS = Liquid, RSA = Air –Fibre racks (overhead 400mm) –RFI spec TBC (100dB) CSP – Bi Lateral

22. Process –AIV to spec growth path Cable marking etc –Doc of what we have (INFRA) – Before T0 Space, power, cooling RFI screening (RFI ITT) Smoke, gas, access/CCTV, ESD (interlock?) Standards –ICD Doc (CSP) – T0-12W Limits (Power) Agreed doc –RR to PDR (update via CM) –PDR to CDR (update via CM) CSP - Bilateral

23. IF Boundaries –Racks in Processing Facilities IF Types –No Racks in facility (Qty, Size & mass) –RFI screening –Power Type AC/DC/Voltage/1 or 3 Phase –Power Usage & Backup / UPS (Reliability) –Cooling type –Cooling redundancy (Reliability) ICD INFRA and SDP

24. IF Types –LAN / Data interface (Data) –Access control / BMS (Functional) –Staff Requirements (ILS/Con Ops) Issues: –Space requirements for LFAA/Survey (AUS), –User supplied equipment space –Location of SDP (On site, off site) ICD INFRA and SDP

25. ICD lead = INFRA IF Boundaries –Racks in Processing Facilities / containers IF Types –Racks (space, size, mass) –Power Type & Quality –Power Backup / UPS (Reliability) –Cooling redundancy (Reliability) –LAN / Data interface (Data) ICD INFRA and MGR (TM)

26. IF Types..... –Access control / BMS (Functional) –Staff Requirements (ILS) Issues ICD INFRA and MGR.....

27. KAPB –130 racks in screened facility –640kW cooling –5kVA average per rack –Flexible feed to rack (1,3 ph A and B bus) –40 Fibre cables entering building –150 Fibre penetrate RFI screened room Existing facilities – SA Site

28. Overall Power –2.5 MVA fitted –5 MVA with full UPS (N+1) –6-7.5 MVA from current grid Sheds –Size of shed vs dish size Support base / workshops –Derived from Con Ops Existing – SA Site

29. KAPB

30. Nov 2012 June 2013

31. KAPB Rack Layout

32. Rack Growth

33. Limitation – Grid Power

34. Support base

35. MRO – AUS Site

40. MSF – AUS Site

41. Pawsey Centre – AUS Site