12 Ge V Upgrade Beam Transport Injection Linac

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

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

Introduction & Scope • To accommodate the new arc 10 line the injector line will need to be shifted over the transfer lines beginning 20. 51 m 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 45 Me. V spectrometer will need to be upgraded and relocated upbeam – Upgrades & final location TBD • 12 Ge. V field strength requirements force us to Injector & Reinjection replace the dipoles on the re-injection chicane girder with higher strength magnets • Songsheet level machine layouts will be presented along with cost estimates

Requirements & Specifications • Alignment specs – Quads positioned to +/-0. 5 mm in x & y, +/- 1. 0 mm in z • Vacuum specs – Beam line partial pressure of hydrogen <10 -6 torr – Total average pressure of all other constituents less than 5 x 10 -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

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

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

Beam Transport Layouts – Injector Line Current Configuration Four Quad Girders (2 new, 2 rebuilt on short girders) Existing injector line running under arc 8 BL dipole shifted 20. 51 m upbeam Shift quad girders upbeam with dipoles 12 Ge. V Configuration VERY congested area – – Documentation of existing stand positions & configuration is incomplete Plan to work closely with alignment group to gather as-built machine configuration Arc 10 quad girder Spectrometer shifted upbeam Arc 10 four meter dipoles

Beam Transport Layouts – Injector Line Quad girders BL dipole Current Configuration BL dipole to replace DK (moved 20. 51 m upbeam) No change to this BL dipole or girder Shift existing girders 12 Ge. V Configuration Existing injector line girders relocated over transfer line

Beam Transport Layouts – Injector Line Current Configuration No changes between dipoles 12 Ge. V Configuration Modified reinjection chicane girder

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

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

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

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

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

Cost Estimates - Highlighted WBS Girders & Stands - Procurements

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

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, Rad. Con, 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