Spreaders & Recombiners Beam Transport Michael Bevins May 30, GeV Upgrade - Beam Transport Spreader/Recombiner Dipoles and Layout, & Installation Labor Preliminary Design and Safety Review

Outline Introduction & Scope Requirements & Specifications Beam Transport Layouts Safety Considerations Cost Estimates Risk Assessment Summary

Introduction & Scope The 12GeV upgrade requires extensive modifications to the spreader and recombiner regions of the machine These are the most congested regions in the beam transport system The latest and greatest layouts for each of the five spreader & recombiner regions will be presented today along with cost estimates We expect these layouts to continue to evolve as we work with CASA to minimize the number of interferences as a result of beam transport geometry changes Cost and installation labor estimates that will be discussed today were developed based on layouts available in March –Layouts have continued to be refined Detailed design of these regions is scheduled to begin early next year and continue into 2009

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 Same as CEBAF…

Beam Transport Layouts – Spreaders & Recombiners Two spreader regions –1 st and 2 nd spreaders Three recombiner regions –1 st, 2 nd and transport recombiners

Beam Transport Layouts – 1 st Spreader Current Configuration 12GeV Configuration Relocate Delete New Upgrade Upgrade three QA quads to QRs and add H-steel to ten 1m dipoles Relocate twelve quad girders, two YR septa magnets and six 1m dipoles Elevation of the 2 nd, 3 rd, and 4 th pass beams have changed between dipoles in the first step Delete three 1m dipoles and one quad girder Add two new curved dipoles, one 3m septa and the beamline to hall D Changes…

Beam Transport Layouts – 1 st Spreader 12GeV 1 st Spreader Layout – Identified Interferences Songsheet level girder and dipole geometry used in layouts Detailed documentation of actual geometry is limited Compared songsheet geometry to photographs of each girder Will need to confirm geometry by measuring every girder in each spdr and recombiner

Beam Transport Layouts – 1 st Spreader 12GeV 1 st Spreader Layout –Potential solutions… Identified potential solutions to eliminate interferences Some existing girders require modification to eliminate interference Will work with CASA to try and minimize alteration of existing girders by moving elements

Beam Transport Layouts – 1 st Spreader 12GeV Layout with Existing Stands Replace 10 vertical stands, modify 2 Reuse vertical stand ceiling and floor foundations Relocate if necessary Add 2 new pedestal style stands to support 3m septa Replace all girder to support stand brackets in first step between dipoles Replace Modify No Change Support stand modification assumptions for cost estimate…

Beam Transport Layouts – 1st Recombiner Current Configuration 12GeV Configuration Upgrade three QA quads to QRs and add H-steel to ten 1m dipoles Relocate fourteen quad girders, one YR septa magnet and seven 1m dipoles Elevation of the 2 nd, 3 rd, and 4 th pass beams have changed between dipoles in the first step Delete three 1m dipoles Add two new curved dipoles, one 3m septa Changes… Relocate Delete New Upgrade

Beam Transport Layouts – 2 nd Spreader Current Configuration 12GeV Configuration Relocate Delete New Upgrade Upgrade one QA quad to QR and add H-steel to eight 1m dipoles Relocate seven quad girders, and four 1m dipoles Elevation of the 4 th pass beam has changed between dipoles in the first step Delete three 1m dipoles, two curved dipoles, and two septa magnets Add two new curved dipoles, two 3m septa, one 1.5m dipole, one 2m dipole, and two quad girders Changes…

Beam Transport Layouts – 2 nd Recombiner Current Configuration 12GeV Configuration Relocate Delete New Upgrade Upgrade three QA quads to QRs, add QB to QC girder, and add H-steel to eight 1m dipoles Relocate fifteen quad girders, and four 1m dipoles Elevation of the 4 th pass beam has changed between dipoles in the first step Delete one 1m dipole, two curved dipoles, and one YR septa Add two new curved dipoles, one 1.5m dipole, one 2m dipole, two 3m septa and the arc 10 beamline Changes…

Beam Transport Layouts – Transport Recombiner Current Configuration 12GeV Configuration Relocate Delete New Upgrade Upgrade two QA quads to QRs and add H-steel to eight 1m dipoles Remove 2 nd quad from three dbl QC girders (install on three new 5 th pass girders), relocate two YA septa magnets to the extraction region Elevation of the 4 th pass beam has changed between dipoles in the first step Delete three 1m dipoles, two curved dipoles, two YR septas, and one quad girder Add three new QC girders, two new curved dipoles, two 3m septas, one 1.5m dipole, and one 2m dipole Changes…

Beam Transport Layouts – Selected Images

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 – Spreader & Recombiner WBS Rollup WBS Elements I have covered today

Cost Estimates - Highlighted WBS Girders & Stands - Procurements

Cost Estimates - Highlighted WBS Vacuum - Procurements

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

Summary Preliminary spreader/recombiner beam transport layouts, cost and installation estimates to support CEBAF at 12GeV 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