1. Injector/Re-injection Chicane Michael Bevins May 17, 2007 12GeV Upgrade - Beam Transport Injection, Linac, Extraction, & Correctors Preliminary Design and Safety Review

2. Outline Introduction & Scope Requirements & Specifications New/Modified Elements/Girder Count Beam Transport Layouts Safety Considerations Cost Estimates Risk Assessment Summary

3. 12GeV field strength requirements force us to replace the dipoles on the re-injection chicane girder with higher strength magnets Songsheet level machine layouts will be presented along with cost estimates Introduction & Scope To accommodate the new arc 10 line the injector line will need to be shifted over the transfer lines beginning 20.51m upbeam of the current position –Two existing quad girders will move over the transfer lines –Three girders already over the transfer lines will be shifted to suit the new optics design Existing quad girders and diagnostics will be reused Two new quad girders will be installed The 45MeV spectrometer will need to be upgraded and relocated upbeam –Upgrades & final location TBD Injector & Reinjection

4. Requirements & Specifications Alignment specs –Quads positioned to +/-0.5mm in x & y, +/- 1.0mm in z Vacuum specs –Beam line partial pressure of hydrogen <10-6 torr –Total average pressure of all other constituents less than 5x10-7 torr Fabrication, welding, cleaning & handling, and leak checking specs still apply –22631-S-001 Fabrication of Ultra-High Vacuum Equipment –22632-S-001 Cleaning and Handling of U.H.V. Components –22633-S-001 Welding Specification For U.H.V. Components –22634-S-001 Helium Leak Test For U.H.V. Components –Note an update and modernization of our vacuum specs is underway

5. New/Modified Elements/Girder Count Preliminary - pending CASA review and more detailed vacuum study Elements in red are part of I&C WBS

6. Beam Transport Layouts – Injector & Re-injection Injector and re-injection area

7. Beam Transport Layouts – Injector Line Spectrometer shifted upbeam Arc 10 four meter dipoles Four Quad Girders (2 new, 2 rebuilt on short girders) BL dipole shifted 20.51m upbeam Arc 10 quad girder 12GeV Configuration Current Configuration Existing injector line running under arc 8 Shift quad girders upbeam with dipoles VERY congested area –Documentation of existing stand positions & configuration is incomplete –Plan to work closely with alignment group to gather as-built machine configuration

8. Beam Transport Layouts – Injector Line BL dipole to replace DK (moved 20.51m upbeam) Shift existing girders Current Configuration 12GeV Configuration BL dipole Quad girders Existing injector line girders relocated over transfer line No change to this BL dipole or girder

9. Beam Transport Layouts – Injector Line Modified re- injection chicane girder Current Configuration 12GeV Configuration No changes between dipoles

10. Beam Transport Layouts – Re-injection Chicane Re-injection chicane girder modifications –Replace dipoles with higher strength magnets –Use existing support stand –Modify plate to accommodate new magnets

11. Beam Transport Layouts – Selected Images View looking downbeam Spectrometer line Arc 8 dipole Injector line quad girder

12. Beam Transport Layouts – Selected Images Injector line girders over transfer lines

13. Safety Considerations Personnel Training –Jlab & sub-contractor Radiation –Designated areas for containment and radiation survey of material that will be removed from the tunnel Material handling –Provide provisions for lifting Electrical Hazards –Package and support electronics, power leads and terminal blocks to control electrical hazards

14. Cost Estimates – Injector/Re-Injection WBS Rollup WBS Elements I have covered today

15. Cost Estimates - Highlighted WBS Girders & Stands - Procurements

16. Risk Assessment Technical - Low –Girders & Supports – very similar designs exist and are already proven –Alignment - same as existing machine Procurement Schedule - Low –No long-lead items identified Cost – Low –Good cost estimates for machined parts Vendor & Jlab shop budgetary estimates

17. Summary Preliminary injector and re-injection beam transport layouts and cost and installation estimates are complete based on present scope We are in a good position to support our DOE External Project Reviews this summer We will continue to work closely with our friends throughout the lab (safety, CASA, installation, vacuum, alignment, RadCon, I&C, magnet measurement, operations, procurement & facilities) as we move forward Detailed design will be completed to support assembly and installation schedules We look forward to comments & recommendations from the committee