MQXC Nb-Ti 120mm 120T/m 2m models G.A.Kirby MQXC has been running for 4 to 5 years and has had many contributors to the design, construction ,testing From CERN, CEA, US labs and industry Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012 Over view MQXC cross section reminder. Aperture Zero assembly over view Heat extraction features (that can be used on all Hilumi magnets) collared aperture Warm Field measurements yokes magnet Warm Fields measurements. Aperture Zero vertical test plan Project plan for magnets Zero, One ,& Two Teat Extraction Horizontal test plan. Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Main Magnet Parameters MQXC Magnet Cross Section Main Magnet Parameters Gradient 118 T/m Aperture 120 mm Working point 80% SS Current 12’850 A Yoke fixing pin Holes for heat exchangers Quench heater Collaring Keys Open shoe Yoke Bean screen Axial assembly Rod Magnetic shims Pressuer vessel shell Two layer coil Yoke key Bus bar, assembly, lifting, feathers. Main Collar Insert Collar Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012 G.A.Kirby

Heat extraction features Collaring Model with open ground insulation The yellow open structure provides helium path from coils to the heat exchangers Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Heat extraction features Thanks to Pier Paolo Granieri for cable images Collars spacing give 6% open We see the open helium paths through the “fish-bones’ and the open quench heater between layers. Open quench heater Open collaring shoes Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012 MQXC project over view -Coil manufacture for 3 apertures completed. -99% of components delivered for all 3 magnets. (We are only missing the half shells , which have been replaced by 4 rods for vertical test) -Magnet zero Warm field measurements very good result! Waiting for 1.9K test in SM18. (end May/ June). Cold test will start to measure heat extraction. (new expected heat load ~860 W @ 1.9K !) Magnet 1 Aperture assembly started. (cold test June /July) Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012 Pole assembly Soldering the inter layer joint Quench heater mounted on top of layer one coil Fish-bone on top of layer 2 Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Magnet assembly over view Large movements during compressing coil, insulation and collars 2 to 3 cm on dia. Vertical assembly 9m magnet will need horizontal assembly Full length collaring keys Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

End flange and joint box End flanges welded to collaring keys Multi layer joint box Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012 4 – 80mm diameter rods temporary replacement for outer shell Yoke packing factor too high at 99.6% we need to reduce to 98% for the next magnet . Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Aperture Warm Field Measurements without Yoke Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Yoked magnet Warm field measurement with large coil set. Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

MQXC Magnetic shims. 8 rods in the collars, and 8 plates between collar’s and yoke. We can adjust final field quality + or – several units Magnetic shims can me mounted or removed easily Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Results from Warm Field measurements in yoked magnet zero Magnetic measurements of the MQXC-1 show all together a very slightly improved field quality with respect to the collared coil. The mulitpole components at 27 mm reference radius are all below 1 unit in 10-4. The effect of the iron yoke on the allowed multipoles is slightly lower than expected (-0.1 instead of -0.48 units for the b6 and -0.005 instead of -0.02 for the b10). It will have to be seen if this is confirmed with the new and more appropriate search coil. The b6 component in the straight section is about 1 unit higher than expected, but in the right direction. The b6 could be further reduced by installing all the tuning rods. This would be useful also for the field quality at nominal excitation, because the saturation effect on the iron yoke is only of the order of 0.4 units. Thanks to Prof. Stephan Russenschuck and his team Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012 Vertical 1.9 K test plan. protection test set up dump, QH testing " training to high field magnetic field measurement joint resistance check beam heating tests, with inter-pole heaters and QH measurement of Ramp rate loss thermal cycle to room temp Change magnetic shims ? cool to 1.9K Repeat high field training and field measurement Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012 MQXC (0,1,&2 Magnet Planning ) for 2012 plan June August Easter Magnet Assy “0” SM 18 Cold testing Magnet “0” Assy Magnet “1” Assy Magnet “2” Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Heat Extraction Cold Horizontal Testing We plan to use a std. MQ cryostat The horizontal test is to see if we can extract the equivalent large heat load (860W over the triplet) (see Rob’s talk later ) Heaters on the cold bore and in the magnet simulate the beam beating ~ 20W on the 2m magnet Valve box to feed two heat exchanger tubes through magnet SM18 Test stand 2M- MQXC MQ vacuum vessel Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012 We are Pushing on with MQXC hope to finish vertical testing this year The End Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012