CLIC Permanent Magnet Quadrupole Engineering Development of second family member Norbert Collomb, STFC Daresbury Laboratory 1N. Collomb 07/11/2012

N. Collomb 07/11/ CLIC Permanent Magnet Quadrupole T2 October 2012 images Motor – Gearbox assembly (Bracket not shown for clarity) Left Hand – Right Hand threaded ballscrew Linear Ball race PM in Frame Assy

N. Collomb 07/11/ CLIC Permanent Magnet Quadrupole T2 Magnet shown in fully open position Magnet shown in fully closed position

4N. Collomb 07/11/2012 CLIC Permanent Magnet Quadrupole T2 A lot of thought has gone into individual components in the assembly context. Manufacturing tolerances and assembly adjustment has been incorporated from the start of the design. Datum faces and reference planes machined in – precise assembly and process specification required (including jigs and fixtures). Small ‘gap’ for height tolerances Recess and hole size to restrain yet connect solidly

5N. Collomb 07/12/2012 CLIC Permanent Magnet Quadrupole T2 Faceplate provisional ‘one piece’ design Yoke fastener holes Rail Bracket fastener holes (loose fit) Rail support brackets and alignment feature

6N. Collomb 07/11/2012 CLIC Permanent Magnet Quadrupole T2 Front view showing a number of principles of how to connect the driving side (ball-screw) with the centre (PM Frame) and driven side (Linear Bushing). Allow for ‘left-right’ alignment Allow for ‘into-out of page’ alignment issues

7N. Collomb 07/11/2012 CLIC Permanent Magnet Quadrupole T2 Grub-screws to adjust width and PM – Yoke gap x 4 per LM rail-carriage. Also used for parallelism alignment (during setup).

8N. Collomb 07/11/2012 CLIC Permanent Magnet Quadrupole T2 Glass envelope as per specification: 391x391x270mm We are ‘pushing’ the boundaries again with ‘bits sticking out. Integration check has shown no conflicts (Alexandre model). Need to check again when more detail design is complete!

9N. Collomb 07/11/2012 CLIC Permanent Magnet Quadrupole T2 Reducing the length (270mm) must be achieved. Proposal to reduce re- circulating linear motion system (HR2042 to HR1530). Forces to check! This would gain 4mm on either side => reduction to 262mm in length possible. Caveat; may need to increase other structural components.

10N. Collomb 07/11/2012 CLIC Permanent Magnet Quadrupole T2 Forces are “known” now => Sizing of components.

11N. Collomb 07/11/2012 CLIC Permanent Magnet Quadrupole T2 Detail design for components we know will not change has started. Drawings and requests for quote have been submitted to supplier. 1.Ballscrew 2.SF/LMF System 3.Motor & Gearbox 4.Coupling HR (recirculation linear ball bearing) can be next size down (HR1530)

12N. Collomb 07/11/2012 CLIC Permanent Magnet Quadrupole T2 Outstanding design decisions: 1.Do we want in situ width adjustment (would need to ‘split’ one piece face plate => reduction in stiffness)? No 2.Incorporate Linear Encoder, preferably on SF/LMF side. Yes 3.Inner and outer limit switches. 4.Encoder/brake on motor (need to do drive train calcs). 5.Permanent Magnet Frame to Ballscrew and SF/LMF interface. 6.Agree on division of shroud into presented components. 7.Keep magnet as single unit and ‘lose’ ability to split. 8.Envelope is very tight (Ballscrew end and SF end just protruding), Faceplate at max Magnet length (provisional) ‘Top piece’ = ‘Bottom piece’ ‘Centre piece’ same on both sides Not as much progress as desired. Need to carry out FEA with known forces.

CLIC Permanent Magnet Quadrupole T2 Quick check on raw material requirement shows: Top and bottom of shroud 61x162.2x190mm (8.3kg) – 4 off required Shroud side 39x190x300mm (16.2kg) – 2 off required Yoke 57x110x190mm (5.5kg) – 4 off required For wire erosion machining we need some more material (+12mm on all sides). Can obtain any shape from 90mm plate (AISI 1006 material). N. Collomb 07/11/

CLIC Permanent Magnet Quadrupole T2 N. Collomb 07/11/ mm flats for vertical and horizontal alignment Assembly considerations – lessons learned from high strength version MUST measure components BEFORE assembly commences and manufacture gauges accordingly. Permits use of assembly gauges to ensure inscribed radius is correct. Also eliminates 5 degrees of freedom (parallelism, perpendicularity). Similar principle to be used on shroud

15N. Collomb 07/11/2012 CLIC Permanent Magnet Quadrupole T2 Summary Progress slower than expected – will speed up next week Still a few decisions to make with regard to design principle – interface Permanent Magnet remains as is – could start tender process Progress with suppliers nearing end – in position to order components soon Magnetic Steel Material source to be identified – could order ‘larger blocks’ Auxiliary items to be incorporated in design – limit switches, linear encoder, … Need to carry out design validation - may lead to design iteration Detail design to be continued on items that will remain as is