MQXAMQXB Magnets in the LHC Inner Triplets J

MQXA/MQXB Magnets in the LHC Inner Triplets J. Kerby 24 Oct 2007 JSK 24 Oct 07

Context of LHC Inner Triplets n n n ~1996: SSC Terminated, CERN looking for contributions to LHC machine Japan has an ongoing and successful Nb. Ti magnet program US HEP (FNAL) restarting Nb. Ti magnet program Negotiations for both to participate in Inner Triplet quadrupoles (next to LHC dipoles among most challenging in the machine) R&D is required for both programs to demonstrate design…not ‘off the shelf’. JSK 24 Oct 07 2

IR Inner Triplet To IP n pipes* beam tube IK 4 M C S O X M C B X A MQXA LMQXC M Q S X pipes T A S beam tube LQXC “Q 3” IK 3 pipes M C B X MQXB LQXB MQXB B P M beam tube IK 2 KEK supplied JSK 24 Oct 07 M C B X MQXA C /W LMQXA beam tube LQXA IK 1 B P M “Q 1” “Q 2” FNAL supplied pipes CERN supplied 3

JSK 24 Oct 07 4

Functional Interfaces JSK 24 Oct 07 5

MQXA n 70 mm, 6. 37 m length, 215 T/m quadrupole n 4 layer coil, >7 k. A Mechanical support through yoke 6660 mm long 490 mm OD Lead end ~40 mm longer than return end mechanical lengths ~same Production at Toshiba Harmonics not the same as MQXB Alignment information transferred by ports through skin to yoke n n n n JSK 24 Oct 07 6

MQXB n 70 mm, 5. 5 m length, 215 T/m quadrupole n 2 layer coil, 12 k. A Mechanical support through collars 5740 mm long 416 mm OD Lead and return end mechanical lengths ~same Final assembly at FNAL Harmonics not the same as MQXA Alignment information transferred by notch in skin welding key n n n n JSK 24 Oct 07 7

End View of Cryostat JSK 24 Oct 07 8

Specifications n Every interface needs to be defined and understood from the standpoint of the end user and the next user q q q q Mechanical Electrical Alignment Beam Physics Cryogenic Radiation Reliability Shipping / Handling JSK 24 Oct 07 9

Plug Compatibility n IF this can be done, allows for q q Parallel development Potential future gain due to successful R&D Mitigation of risk in success of end project Variation in industrial relationships JSK 24 Oct 07 10