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MICE Collaboration Meeting Harbin, China 13 – 17 January 2009 Progress on AFC since the PRR By

MICE Collaboration Meeting Harbin, China 13 – 17 January 2009 Progress on AFC since the PRR By Wing Lau, Oxford University. A re-cap of where we are on the AFC module supply contract.

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MICE Collaboration Meeting Harbin, China 13 – 17 January 2009 Progress on AFC since the PRR By

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  1. MICE Collaboration Meeting Harbin, China 13 – 17 January 2009 Progress on AFC since the PRR By Wing Lau, Oxford University

  2. A re-cap of where we are on the AFC module supply contract. • Contract was for the design and supply of 2-off FC modules with the option to purchase the third one at a later stage; • Contract to Tesla was signed in June 2008; • First hiccup was the conductor size and the availability of a continuous conductor length. At the end, we agreed to go for the Type F 174 wire: • Conductor type: F174 (Final purchase F 180 – number of filaments) • Dimension bare 1.52 x 0.95 mm² • Formvar insulated 1.57 x 1.00 mm² • Consisting of 174 NbTi filaments (final purchase – consists of 180 filaments) • In a Cu-matrix • Ratio Cu : NbTi abt. 4.0 : 1 • Core conductor with Nb-barrier • Core Alpha abt. 0.45 • Corner radius > 0.20 • Filament diameter abt. 48 µm (final purchase is now 46 µm ) • Ic at 4.2 K; 0.1 µV/cm, 5 T – 686 A • RRR > 80 • Purchase order for the conductor was released at the end of July to allow for a delivery in late March 2009. This is one of the critical long lead items.

  3. The preliminary design review was held on the 12th of August. It did not go as well as expected with a number of technical issues (Thermal modelling, Quench protection design and cold mass forging) not finalised. A subsequent meeting on the 24th of September cleared some of these outstanding items. Tesla had done a lot of work since the initial preliminary design review, though the bobbin design was still not satisfactorily completed. The review paved the way for further detail design work in rediness for the PRR (Production Readiness Review) A Production Readiness Review was held on the 6th - 7th of November (originally scheduled for the 9th of October) A list of items which require re-work / design modifications were identified and agreed on. These are listed in the following table with af=greed actions.

  4. Further to the review, Tesla has now completed the thermal modelling on the new bobbin configuration with external cooling

  5. Summary a.The maximum coil temperature calculated is 4.51K which is still lower than the criterion(4.8K) but leaving only 0.3K margin. b.Calculation results satisfied all design criteria.

  6. Input data -- Dimension & material data of the turret system including current load

  7. Thermal conductivity of each interface after the iterative calculation CryoMech cooler PT415 cooling capacity map

  8. Summary of the AFC status: • Bobbin IssuesFollowing Document was submitted to MICE team on5th January:- • MICE AFC Bobbin linearization report – this analysis proves 6061-t6 Bobbin with the increased sizes detailed therein will meet the stress seen during operation. Document is on Web page for comment by MICE team. • Vacuum Vessel • Following Document was submitted to MICE team on5th January:- • MICE AFC Vacuum Vessel – analysis of the vacuum vessel integrity under differing vacuum/pressure combinations. • Document is on Web page for comment by MICE team. • Suspension System • S-Glass Testing results submitted. Document is on Web page for comment by MICE team. • Further stress modelling of the suspension system is continuing. • MICE Quench Protection • The final design report is now available. It concluded that an active Quench detection and protection system is needed.

  9. Indirect Cooling Thermal Model • Thermal model set up and ran, A simplified excel model has already been run and a report has been submitted on 6th January. • Turret Redesign • The turret redesign incorporating the changes for the Vent line, HTS lead configuration, Hydrogen system interconnects, Hydrogen system heat exchanger and accessibility issues are nearing completion and will be available early next week. • Instrument Services • Listing has commenced • Fault Cases • This has commenced • Critical Items – Vessel Flanges • Method of manufacture will be detailed to ensure tolerances can be achieved. • Superconductor Splicing • Further work on this will be undertaken at Tesla prior to receipt of Superconductor which is still on schedule for delivery end March09. • Project Plan • This has been updated to show current status. It shows a delay of 39 days. Delivery of the 1st module is now the beginning of January 2010

  10. Documents relating to the AFC All the technical reports from Tesla are now kept in the STFC web page:- www. eng-external.rl.ac.uk/miceafc This webpage is managed by Tom Bradshaw and is password protected. Please email me or Tom for detail.

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