LINACs

Michael BevinsMay 17, 2007

12GeV Upgrade - Beam Transport

Injection, Linac, Extraction, & Correctors

Preliminary Design and Safety Review

Outline

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

Introduction & Scope

• The12GeV upgrade requires an additional ten cryomodules– Five in the north linac and five in the

south• NEW modules are longer than the original

CEBAF modules– Result: Warm region girders

downstream of the new modules must be replaced with a new short girder

• Like downstream of SL21

• 12GeV field strength requirements force us to replace two QB quads at the start of the linac with QCs

• Songsheet level machine layouts, QB to QC mod, and the short warm region girder will be presented along with cost estimates– Only modified sections of the LINACs will be included in this presentation

Requirements & Specifications • Alignment specs

– Quads positioned to +/-0.5mm in x & y, +/- 1.0mm in z• Vacuum specs

– Pre linac: (at MQB1L00 & 01)• Beam line partial pressure of hydrogen <10-6 torr• Total average pressure of all other constituents less than 5x10-7

torr– Warm region girders between cryomodules

• UHV • 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 Linac Elements/Girder Count

Element Qty Element QtyQuads 12 Diagnostics

QB 10 BPM 12QC 2 Viewer 2

Correctors 14 VacuumBT Horizontal 2 Ion Pump 18BT Vertical 1 Convectron Gauge 1DJ Vertical 5 Beam Valves 18DB Horizontal 6 Fast Valve 2

DP Stations 2Qty Roughing Valve 10

New Quad Girders 12Warm Region Girders 10Single Quad Girders 2

QC 2

• Elements in red are part of I&C WBS

Beam Transport Layouts – N&S Linac

• North Linac 1st Section– QB to QC change at MQB1L00 & 01

• N&S Linac Sections 3 & 4– Add new modules in zones 22 through 25– Replace warm region girders with new short girder

North Linac

South Linac

Beam Transport Layouts – QB to QC change

• MQB1L00 & MQB1L01 girder modifications– Replace QB quads with higher strength

QCs– Shift MQB1L00 stand 4 inches upbeam to

improve girder stability– Shift MQB1L01 upbeam 7.6cm from

12GeV dimad positionView looking upbeam to MQB1L00 & 01 girders

MQB1L00 MQB1L01

Beam Transport Layouts – N&S Linac

New module

Four New modules

Layout of new modules & girders in linac

Current Configuration (Zones 19 – 22)

12GeV Configuration (Zones 19 – 22)

Current Configuration (Zones 23 – 26)

12GeV Configuration (Zones 23 – 26)Five New warm girders

DP station moved to end of linac

Replace module baseplates

Beam Transport Layouts – Warm Region Girders

Old warm region girder New short warm region girder

Viewer & pump drop cross

H&V nested Air Core correctors over BPM

Quad

Existing baseplate

New stand

• Warm girder design reviewed in Oct 2004• Prototyped and installed at SL21• Designed to accommodate multiple combinations of

cryomodule configurations• Quad, BPM, and alignment cartridges will be reused

on new short girders

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 – LINAC WBS Rollup

12GeV Beam Transport Scope, Labor & Procurement Estimate

D/PM & J Material

1.3.4.3 LINACS 13.7 5.7 107.9 127.4 20.4 115.9 19.5 2.8 0.0 0.0

1.3.4.3.2 QUADS &CORRECTORS 2.2 2.0 4.1 8.3 2.1 14.7 3.7 2.8 0.0 0.0

1.3.4.3.3 GIRDERS & STANDS 2.2 0.7 0.2 3.1 0.6 73.4 11.6 0.0 0.0 0.0

1.3.4.3.5 VACUUM 1.0 1.5 10.5 13.0 2.1 20.4 2.2 0.0 0.0 0.0

1.3.4.3.6 INSTALLATION &ALIGNMENT 8.4 1.5 93.2 103.1 15.7 7.5 2.0 0.0 0.0 0.0

TotalContingency

Total Contingency

LABOR [Man Wks] PROCUREMENTS [$k] EXPENSES [$k]

WBS ELEMENT ME MD MT Total Contingency

WBS Elements I have covered today

Cost Estimates - Highlighted WBS

12GeV Beam Transport Scope, Labor & Procurement Estimate

WBS ELEMENT /Activity ID ACTIVITY DEFINITION / SCOPE ITEMS Basis D/PM J D/PM & J

Total [$k]

1.3.4.3.3 GIRDERS & STANDS 73.4 11.6

1 Proc/Vend Fab Linac Stands (Linac Stands) 13.2 2.0

m Procure new warm girder stands 1200 11 13.2 eng jud 0.15 2.02 Proc/Vend Fab Linac Girders (Linac Girders) 48.4 0.16 7.9

m Procure warm region girders 3710 11 40.8 eng jud 0.15 6.1

mFab new girders to accommodate QB to QC change at MQB1L00 & MQB1L01 2550 2 5.1 eng jud 0.25 1.3

m CF flange pair gasket and hardware 27 35 1.0 catalog 0.10 0.1m Fab beamline tie-in spools 300 5 1.5 eng jud 0.25 0.43 Proc/Vend Fab Linac viewer Pump drops (Linac Girders) 11.8 1.8

m Procure warm girder viewer pump drops 1076 11 11.8 eng jud 0.15 1.8

ContingencyQTY Total

[$k]

PROCUREMENTS

Unit Cost [$]

Girder & Stand Procurements

Girder Cost[FY07$]

Typical LINAC Warm Region Girder & Stand 7746Supports & Hardware 2350Stand 1200Vac (includes 40L/s ion pump & roughing valve) 4196

* Warm girder qty includes one spare

* Warm girder cost reviewed as part of Quad review on May 3rd 2007

Risk Assessment

• Technical - Low– Girders & Supports – very similar designs exist and are

already proven– Warm region girder prototyped and installed at SL21– Alignment - same as existing machine

• Procurement Schedule - Low– No long-lead items identified

• Cost – Low– Linac warm region girder recently prototyped– Good cost estimates for machined parts

• Vendor & Jlab shop budgetary estimates

Summary

• Preliminary LINAC 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