Spectrometer Solenoid Fabrication Update

Steve VirostekLawrence Berkeley National Lab

MICE CM23 at ICST, Harbin January 14, 2009

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

MICE Cooling Channel Layout

Spectrometer Solenoid #1 (partially disassembled)

Spectrometer Solenoid #2 (final assembly under way)

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

•Second magnet cold mass now assembled with fixes

•New cooling circuit, added relief vent line

•Second magnet thermal shield modified•LN reservoir added, thermal shield connection improved

•Second magnet support stand modified to accommodate iron shield mounting pads

•Installation of cold mass into vacuum vessel of second magnet to take place this week

•Portable CMM measurements during magnet assembly will ensure proper cold mass alignment and centerline height

•First magnet has been partially disassembled to add fixes

•Service tower disassembled, end plates and warm bore removed

Summary

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

Modified Cooling System

Liquid/vapor helium accumulator base and cold mass connections

Direct cryocooler sleeve connection with bellows

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

Leak Test of Cooling System

Liquid/vapor He accumulator and cryocooler sleeves

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

Fully Assembled Cold Mass and Shield

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

2nd Magnet Cold Mass Ready to Install

•Cold mass being suspended in vacuum vessel this week

•Improved thermal shield connection added

•Second cryostat vent tube added

•LN reservoir installed on thermal shield

•Helium cooling circuit modification is complete

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

2nd Magnet Components before Assembly

Vacuum vessel

Radiation shield

Cold mass

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

Vacuum Vessel and Support Stand

End flange

Modified support stand legs

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

Magnet CMM Measurement

•Portable CMM will be used to align cold mass to end flange and set height

•Tooling balls will also be added to vessel and fiducialized to cold mass

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

First Magnet Partially Disassembled

MICE Spectrometer Solenoid Fabrication Update and Schedule Status

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Steve Virostek -- Lawrence Berkeley National Laboratory -- January 14, 2009

•The plan to move forward involves completing and testing Magnet #2 first (with all modifications)

•Several technical issues as well as negotiation with the vendor on change costs has delayed completion

•The current goal for completing the first unit (Magnet #2) including cooldown and test is the end of February

•Upon shipping of Magnet #2 (now first unit), Magnet #1 will be modified (reconfigure cooling, add vent line, LN reservoir, etc.)

•The reassembly and completion of Magnet #1 should follow by approximately two months

Schedule