1 BROOKHAVEN SCIENCE ASSOCIATES Abstract Magnet and Girder Integration Lewis Doom, NSLS-II Project National Synchrotron Light Source II (NSLS-II) will

1 BROOKHAVEN SCIENCE ASSOCIATES

Abstract

Magnet and Girder Integration

Lewis Doom, NSLS-II Project

National Synchrotron Light Source II (NSLS-II) will be a 3-GeV 792-meter circumference 3 rd generation synchrotron radiation facility with ultra low emittance and extremely high brightness. There will be a total of 90 multipole storage ring girder assemblies including machined girder weldments, vacuum chambers, multipole magnets and various pieces of ancillary equipment. A major effort was made to eliminate interferences between components and assure adequate assembly procedures. Topics that will be presented include considerations for designing, interfacing and potential interferences in the development and manufacture of storage ring multipole girder assemblies. Software requirements for the design of large assemblies will be presented along with requirements for access to various components after installation. Alignment requirements and the required fixturing for magnets and vacuum chambers took a significant effort and must be integrated into the overall design of a girder system. These topics will be described in detail. *Work performed under auspices of the United States Department of Energy, under contract DE-AC02-98CH10886


Magnet and Girder Integration

L. DoomMagnet WorkshopApril 11-12, 2012


Outline

• Overview• Designing, interfacing and interferences• What components will need access later• Wiring and utility connections• Measuring and adjusting• General comments


Girder Assembly Overview

• All Primary Girder assemblies are modeled in detail• Major assemblies include

• Girders (150 total required)• Magnets (60 Dipoles, 300 Quadrupoles, 270 Sextupoles,

180 Correctors)• 210 Vacuum chamber assemblies (150 large aluminum

chambers, 30 small aluminum chambers, 30 inconel chambers)

• Diagnostics (370 vacuum chamber mounted buttons)• Water manifolds and connections• Electrical enclosures and raceways

Girder 4 (30 Required)Girder 2 (30 Required) Girder 6 (30 Required)

Dipole Girder (60 required)


Assembly Specifications

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• Multipole magnet alignment requirements• Vertical ±30 microns• Transverse: ±30 microns• Longitudinal: ±500 microns• Roll: ±.5 mrad• Pitch: ±1.0 mrad • Yaw: ±1.0 mrad

• Multipole magnet alignment at NSLS-II is done in two stages• Preliminary alignment with laser tracker• Final alignment with vibrating wire inside temperature controlled room

Required specifications should be defined as early as possible along with expected procedure.


Software• Use software to identify interferences between parts• Use models that are as accurate as possible• Involve all groups in interface and interference checks.

Regular meetings and reviews as primary design work is being done. This can take a significant amount of time and should be planned for

• Use software that can handle very large assemblies – Multipole girder assembly is 8127 files. Dipole

assembly is 1666 files– Cell assembly is about 30,000 files – Pentant is about 180,000 files– Storage ring is about 900,000 files– Inventor’s usable limit at about 10,000 files– Navisworks is used at NSLS-II for very large

assemblies but is primarily for viewing and has limited interactivity


Lattice

-Make sure Lattice is defined using adequate spacing between magnets-Lattice must include real sizes of components (not just points on a spreadsheet.) Coils and Plumbing may extend beyond expectations


Lattice

As the design develops show real sizes and spacing


Lattice

All components must be shown and evaluated to eliminate interference. Review by all Groups as design progresses


Splitting Magnets

If splitting magnets will be required make sure they are designed to do this easily and test. Splitting water lines at the center would simplify process

Water manifold removed

Unsupported conductors


Interfaces

Magnet MountsMake sure there is more

adjustment available than required

Measuring instruments

Fixtures for Vacuum Chambers and Magnets

Original configuration Final configuration Final configuration


Interfaces

Survey Access and VisibilityAccess in the tunnel will be limited


Interfaces

Ion Pumps (move with expansion of bakeout)

Vacuum Chamber StandsExpansion during bakeout

(expect over 6mm with aluminum chambers)

Vacuum Chambers (2mm is minimum 3mm would be better)

Leave more room for coils (4mm)


Interfaces

BPMsRoom is need for

installation, Survey and wiring

Water Connections Water flow requirements and pressure drop across magnets must be clearly specified and understood by the suppliers (All suppliers failed to meet this specification)


Interfaces

• Bakeout


SPECIAL WIDE MAGNETS

• The beam eventually has to get out• If wide magnets are made they

should be manufactured from the same vender as standard width magnets

• Confirm exit requirements as early as possible and lock it in STONE (before magnets are designed)

Girder 2

Girder 4


What components will need access later

BPMsIon pumps Flanges and Bellows

Vacuum chamber standsBake-out heaters and instrumentation

Corrector magnets slide out for access to bellows

Water connections


Wiring and Utility Connections

• Power wires• Make sure hardware sizes and

spacing are clearly identified and standardized

• Guards• Make sure the requirements are

clearly understood• Water connections

• Water connection sizes should be relative to the flow requirements. They may be smaller than you think

• Ground wires and routing


Measuring and adjusting

Leaves access for instruments and hardware

Make room for wrenches

Push on center for alignment

Vertical, Transverse and longitudinal adjustment and fixtures


General comments

• There is more to a magnet than harmonics• You learn a lot the first time an assembly is put together.

– If prototypes are purchased purchase at least a full girder compliment to test all concepts (assembly procedures, measuring equipment, fixtures, alignment, vibration, wiring and plumbing, survey, …)

• Safety factors should be applied to specifications because some wont be met.• Add enough clearances between parts (the boundary's will be pushed)


It takes a good team

Mechanical Assembly and inspection

Electrical measurement and inspection

Documents

1 BROOKHAVEN SCIENCE ASSOCIATES Abstract Magnet and Girder Integration Lewis Doom, NSLS-II Project National Synchrotron Light Source II (NSLS-II) will