Extraction Michael Bevins May 17, 2007 12GeV Upgrade - Beam Transport Injection, Linac, Extraction, & Correctors Preliminary Design and Safety Review Extraction Michael Bevins May 17, 2007

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

Introduction & Scope The extraction region must be upgraded to support transport of higher energy beam to halls A, B, & C and 5th pass beam to the new arc 10 to support 12GeV operations Songsheet level machine layouts will be presented along with cost estimates Extraction Region

Requirements & Specifications Alignment specs Quads & dipoles 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

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

Beam Transport Layout - Extraction

Extraction Layouts – RF Separators Current Configuration 12GeV Configuration New double quad girder New quad girder Relocated New Two new pedestal stands Existing supports

Extraction Layouts – RF Separators

Extraction Layouts – Septa Magnet Stacks Current Configuration 12GeV Configuration New quad girder Two new support stands Relocated Two YBs One relocated and one new support stand New Three YRs Two new pedestal stands YA Septa Stacks YB/YR Septa Stack

Extraction Layouts – Septa Magnet Stacks Existing YA Septa Stack Existing YB Septa Stack

Extraction Layouts – Dipole Magnet Stacks Current Configuration 12GeV Configuration New Two new support stands Three BPs New BP Dipole Stack

Extraction Layouts – Dipole Magnet Stacks Current Configuration 12GeV Configuration New

Extraction Layouts – Dipole Magnet Stacks 12GeV Configuration Two existing BQs New support stand Three new BPs New New BP New pedestal for 5th pass BP downbeam support Two new pedestal supports for 5th pass BP BQ/BP Dipole Stack BP Dipole Stack

Extraction Layouts – Dipole Magnet Stacks BP Stack BQ Stack Existing BP Dipole Stack Existing BQ Dipole Stack

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 –Extraction WBS Rollup * * Septa and dipole vacuum chambers WBS Elements I have covered today

Cost Estimates - Highlighted WBS Stands - Procurements

Risk Assessment Technical - Low Girders & Supports – very similar designs exist and are already proven Vacuum - existing designs already proven, detailed vacuum analysis TBD 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 extraction 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