Superconducting Corrector Magnet Progress Report
P. Wanderer
Superconducting Magnet Div;
Dec. 15, 2007
T2K US B280 collaboration meeting
What’s Needed
Dipole correctors:– Corrector = vertical + horizontal windings, one
wound over the other– Three correctors to install + two spares– Overall Schedule:
• Prototype (= 1 spare) now at KEK• #1, #2 – January, February• #3 – may be later (depends on #1, #2 actual
schedule)• #4 – spare more flexible schedule
Corrector Parameters
- NbTi superconducting wire, 0.33 mm Ø (used for RHIC correctors) Bdl = 0.1 T·m; Lmagnetic = 522 mm– Bpeak = 0.2 T, Bquench > 6T
Significant temperature margin for operation
– Iop = 43A– Inner diameter = 150 mm– Slot length = 800 mm– Located between main magnets conduction
cooling thick-walled Cu tube
Corrector Status
#1: test completed 12/11 – magnet ok
#2: construction completed
#3: 3 of 4 layers have been wound
#4: copper support tube insulated
#1 – test results, next steps
• Operating current: 43A
• Test results: both coils reached max test current (60A) powered separately and together in both configurations without quenching.
• Next: warm measurements (finish by 12/31). The shipping crate has been built.
$ and ¥
¥: KEK to pay $140,000 toward correctors in exchange for equal purchases by T2K in Japan (1 2 correctors)
$: $190,000 loan from BNL HEP program for R&D magnets
$: T2K DOE construction funds will repay BNL HEP and cover the remaining construction cost