1. 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

2. 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

3. 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

4. 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

5. 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

6. 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(We are only missing the half shells , which have been replaced by 4 rods for vertical test)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 ~ K !)
Magnet 1
Aperture assembly started. (cold test June /July)
Glyn A Kirby, LARP CM18/HiLumi LHC Meeting May 2012

7. 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

8. 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

9. 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

10. 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

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

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

13. 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

14. 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 The effect of the iron yoke on the allowed multipoles is slightly lower than expected (-0.1 instead of units for the b6 and instead of 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

15. 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

16. 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

17. 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

18. 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