1. Correctors for the J-PARC Proton Beam Line Peter Wanderer BNL Superconducting Magnet Div. September 8, 2007 T2K US B280 Collaboration Mtg.

2. 600MeV Linac 3GeV PS 50GeV PS N FD Neutrino Beam Line To SK JHF NuMI (FNAL) K2K E(GeV) 50 12012 Int.(10 12 ppp ) 330 406 Rate(Hz) 0.27 0.530.45 Power(MW) 0.75 0.410.0052 JAERI@Tokai-mura (60km N.E. of KEK) 10 21 POT(130day)≡ “1 year” Use Super Con. mag. in line JHF project and neutrino beam line

3. 11 February 2005T2K proton line correctors3 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 Remaining four at JAERI by Dec. 31, 2007 –three months earlier than previously stated. –Change in schedule is due to revised estimate of installation plans

4. 11 February 2005T2K proton line correctors4 Corrector Parameters - NbTi superconducting wire, 0.33 mm Ø (used for RHIC correctors) –  Bdl = 0.1 T·m; L magnetic = 522 mm –B peak = 0.2 T, B quench > 6T  Significant temperature margin for operation –I op = 43A –Inner diameter = 150 mm –Slot length = 800 mm –Located between main magnets  conduction cooling  thick-walled Cu tube

5. 11 February 2005T2K proton line correctors5 Coil Winding Precision semi-automatic winding machine developed for other projects.

6. 11 February 2005T2K proton line correctors6 Test Results of Prototype 4.5 K, liquid helium Test coil only (yoke added by KEK) Test to ± 90A to obtain same field as will be produced at 43A with yoke on. Reached 90A without quenching  excellent performance. Measure integral fields, field uniformity across aperture  ok

7. 11 February 2005T2K proton line correctors7 Cost Cost basis: –Prototype construction –Construction of similar magnets for HERA collider at DESY and BEPC upgrade Correctors – four - production, testing, shipment to Japan: $500k –Includes 13% contingency, all overheads.

8. 11 February 2005T2K proton line correctors8 Progress Report “Early” (i.e., “just in time”) start made possible by Stony Brook: –Copper forgings (cylindrical support tubes) ordered by Stony Brook 1 forging rec’d by BNL, machining starts Monday 4 forgings shipped to BNL yesterday –$120k advance funding to BNL from Stony Brook Research Foundation –Thanks to Chang Kee and Joan!

9. 11 February 2005T2K proton line correctors9 “Just in time” Technical: BNL has two automatic winding machines (not identical) –Had planned to use just one –Will use both to meet schedule Financial: “no delays due to $”  –Advance for remainder of budget (DOE requires “no working ahead of funding”) –Prompt billing by BNL –Prompt payment by Stony Brook/NY state

10. 11 February 2005T2K proton line correctors10 Forging in BNL Lathe

11. 11 February 2005T2K proton line correctors11 Cost status Forgings –Estimated @ $3k each  $15k total –Actual cost $28k BNL machine shop costs –Increased from $90/hr to $115/hr