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Progress on AFC Procurement T W Bradshaw Rutherford Appleton Laboratory Harwell Science and Innovation Campus Didcot, OX11 0QX, UK

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Presentation on theme: "Progress on AFC Procurement T W Bradshaw Rutherford Appleton Laboratory Harwell Science and Innovation Campus Didcot, OX11 0QX, UK"— Presentation transcript:

1 Progress on AFC Procurement T W Bradshaw Rutherford Appleton Laboratory Harwell Science and Innovation Campus Didcot, OX11 0QX, UK Tom.Bradshaw@stfc.ac.uk MICE CM27 Tom BradshawWing Lau Elwyn BaynhamJohn Cobb Mike CourtholdMatt Hills Mark SavillTesla

2 Introduction Quick update on Progress Schedule

3 Quality Control Key manufacturing issues are listed with mitigating steps ItemPhotographOther Mitigation HTS Leads Warm partConnections a)Retain copper sample for independent verification b)Tesla QA CofC c)In-situ measurement of Resistance possible HTS LeadsTesla QA CofC HTS Leads – SS shuntAssemblyRetain material sample CryocoolersThermal interfacesTest before installation Suspension Thermal interfaces Mid position thermal link a)Retain sample of thermal link material b)Tesla QA CofC Radiation shieldAssembly a)Retain sample for possible independent verification b)Tesla QA CofC Multi Layer InsulationAssembly Fill pipePhotograph fill pipe intercepts a)Retain sample of thermal link material b)Tesla QA CofC Conductor taila)Joints b)4K Intercept

4 Test Programme Working with Tesla on the test programme Test programme includes Manufactured coil tests including coil resistance checks and inductance tests as the coil is wound. Photographs of all thermometer locations Fiducial marks Acceptance tests, pressure tests Performance tests Etc.... Some issues on defining the coil insulation tests – easy to over-test and damage the coil. Using some experience gained at CERN on ATLAS.

5 Quench protection Non-flip no quenchback Non-flip all losses included Worst case Best case 1000V600V Final T < 100K

6 Quench protection Quench protection is quite simple: Centre grounded 3 ohm dump resistor Quench detection system to open power supply circuit in the event of a quench (can be relatively slow ~1sec) Power supply is being specified and will be ordered asap

7 Winding Tension Winding tension is important for two reasons: a)Thermal quenchback helps in the quench protection scheme b)Want to keep coil on bobbin to avoid quench from debonding Issues here: How important is thermal quenchback to quench protection ? Without this parameter still only get 1kV (see previous slide) – not essential for quench protection Driving criteria is to avoid magnet movement – hence quench – use slip planes.

8 Winding Tension Tesla model looking at the integrated CTE’s, winding tension, hoop stresses etc... Earlier FE models doing the same calculation to compare with From this we have settled on a winding tension of 100N which gives us margin (0.125 to 0.25mm on radius) Tesla now proceeding with winding trials....

9 Instrumentation List Thermometers at key locations Voltage taps as shown Compatible with KEK absorber instrumentation - checked

10 Schedule First Magnet to RAL January 2011 – may try and move this forward because of VAT increase.... Second to RAL May 2011 Third ????

11 Summary Progress on the procurement of the AFC is progressing steadily Technical issues are resolved Winding trials about to start Absorber integration and interfaces are being resolved Open issues: Magnetic field measurement Still working on test programme Mini flange procurement Absorber connector position Third AFC

12 END

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