Dipoles for LBNE Primary Proton Beam Line David Harding 11 November 2009

Outline Scope Choices Issues Next step

Why you should care ~$10,000,000 vs. ~$1,500,000 for dipoles Echoes through cost of other systems –Some plus –Some minus Technical issues

Scope Working with V-10 of beam line from Peter Lucas dating from the middle of September No significant changes expected in dipoles Seven dipole circuits MagnetLengthCountCurrents m21 EPB dipole3 m42 6-m dipole6 m434

’s EPB Dipoles

6-m Dipoles – main bend 6-m Dipole – special match

6-m Dipoles – main bend

6-m Dipoles – bend down

6-m Dipoles – bend up

Choices Old Main Ring dipoles – B2 –Refurbish –Rebuild Main Injector dipoles – IDA/IDB –Build to original design –Modify original design

B2 Dipoles

IDA/IDB Dipoles

B2 Work “Refurbish” –Inspect –Flush –Change ceramics –Touch up –Modify “Rebuild” –“Burn” epoxy –Clean up –Reinsulate coils –Reassemble –Thorough testing

IDA/IDB Work Main Injector model –Buy steel –Buy laminations –Buy cores –Buy coils –Assemble in house

Issues B2 RefurbishedIDA/IDB New Magnet costLowHigh Power costHigherLower VoltageHigherLower Heating/coolingMarginalCool Bus work, localMoreLess Bus work, feedLighterHeavier InstallationLighterHeavier ReliabilityMarginalExcellent

Next Steps Issues list in LBNE DocDB Magnet cost estimate nearly complete Power supply estimates nearly complete Need data on impact for other systems Consider modification to IDA/IDB coils Choose