1. Target Assembly and Installation Update 20 th August 2009 Paul Hodgson The University of Sheffield

2. Overview Assemble and test two complete target systems in time for installation during August 2009 shutdown Status of components Assembly plan and progress Commissioning plan

3. MICE Target Mechanical Design Jason Tarrant – STFC –Working on upgrade of Target Mechanics Many key components redesigned Particular emphasis on the shaft and bearings Tighter control of component alignment, tolerances and QA

4. Key changes –Circular tube lower section –Shorter length with extra dip depth –Balanced vane assembly  5.95/4.55mm Ti gr2 tube Slot & fixings for read-out vane Double flat for anti-rotation  4mm Solid Ti gr2 rod Stop Bearing surfaces Status of Upgraded Shaft

5. Coated Shafts Two shafts back from TecVac with DLC coating CoC from TecVac says we have 4 µm DLC coating Metrology shows one shaft slightly misaligned 200 µm out of true The 200 µm measured from ends so real effect is less that half this Decision to use perfect shaft in T1 and straighten other for use on T2 in R78

6. Surfaces look OK overall Talking to TecVac wrt slight mottling on lower shaft Upper shaft flat region shows one good side and one with evidence of machining marks Not a problem but will ensure best side in contact with bearing follower Lower shaft region showing some mottling Upper shaft region (flat) showing tooling marksOther side of flat with less visible tooling marks

7. Status of Upgraded Bearings Single piece main section Improved alignment Reduced tolerances/clearances New anti-rotation design Two pairs of bearings coated and ready for assembly Metrology and visual inspection seem fine Bearing hole Removable wedge Rotation stop Dowel & angle faces for location DLC set-up: wedge removed = line of sight to bearing surface

8. Upper bearingLower bearing Again some evidence of minor tooling marks on all bearings but the engineers are happy with finish

9. Status of Upgraded Core Assembly Simpler bolt together design Independent stator assembly Added active packing to top of stator Main body assembly shorter by 41mm, shaft tube section shorter by 31mm - gain 10mm dip depth Stator = independe nt assembly Bearing extension reducing length of unsupport ed target shaft Compact core with solid bolt together interfaces

10. Status of Upgraded Vane Ruggedized & balanced Individual slots with guard edge Successfully tested with optical block New balanced vane with guarded teeth and slot for reset

11. The Clean room All components laid out prior to assembly First assembly of shaft and bearings in main body

12. The Plan Assemble 1 st target system in clean room – 2 days Simultaneously commission electronics in R78 – 2 days Install T1 in R78 – 3 days Simultaneously commission electronics in MLCR – 2 days Test T1 in R78 for ~50k pulses then remove and install in ISIS – 25/26 th Aug Simultaneously assemble then install T2 in R78 – 2 days Longer test of T2 ~300k pulses – 4 days Removal and close inspection of T2

13. Started on time ISIS installation T1 assembly underway but approx 1 day late

14. Key Elements Items from previous meeting Stator Main Body assembly in clean room oStator body with the new end plates welded. RALReady oOptics block (calibrated) with laser safety covers.SheffieldReady oCoated bearings, upper and lower.RALReady oShaft, vane and magnetsRAL Ready Final assembly in R78: oPower, Water, Fibre OpticsSheffieldReady oChiller - Second chillerRALReady oBellowsRALReady oDAQ PCSheffieldReady oControl PCDaresburyReady

15. Key Elements Points from previous meeting Power Electronics in R78 and VacRack area - DONE Control software for power electronics needs upgrading in R78 and MLCR – DONE Spare fibres laid to Synchrotron - DONE All connections to target assembly to be clearly labelled and documented - DONE Health and safety documentation - DONE Appropriate people involved need to be aware of the schedule and timescale - DONE

16. Commissioning Plan There is a clear plan for commissioning in beam in early September Key target team people identified and available for shifts

17. Conclusion All components here and checked Assembly begun Some issues but no show stoppers Should be on track for installation 25-26th