Collab 4/15/04 #1

EDM UIUC meeting 12/3/2004

Walter Sondheim, P-25, Los Alamosfor presentation to

The EDM CollaborationUIUC meeting, Urbana, IL

UCN storage/lifetime tests run at LANSCE

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EDM UCN lifetime measurement

Current status of EDM beamline:

EDM gate valve, released to shop for fabrication.

EDM/UCN switcher, release to shop for fabrication (2)

EDM test chamber, moved into Area-B, lid removed for inspection.

A Helitran pump has been identified for cooling acrylic trap.

A Cryotorr pump and gate valve are available to connect to the test chamber, along with a scroll pump.

All other beamline components are in the “design” stage.

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EDM View of UCN experiment

UCN beam height 108 in. from floor

B4 shield block, 60in. H. x 32in. x 72in.

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EDM Plan view of UCN experiment

Pre-polarizermagnet

AFP magnet

SCS spectrometer magnet

All three magnets shown Are superconducting

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EDM EDM test chamber on UCN beamline

Chamber is 40 in. dia. X 36 in. height, 4-32 in. flanges with 23.5india. ports.

8 in. dia. AcrylicTube, with diamondcoating, UCN trap

UCN trap-door

Direction ofbeam

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EDM LANSCE, exp. Area-B, UCN source

Experimental area-B is 78ft L x 60ft W x 23ft H

Liquid Helium cryogenic facilityUCN source

UCN lifetimeTest chamber

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EDM EDM beamline components

EDM switchEDM valve

EDM switch-2, nowa shutter

40 in

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EDM ARS model 3B Heli-tran, open cycle cryo. system

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EDM Cryo-Torr-8

Water vapor – 4,000 l/sec, Air – 1,500 l/sec, H2 – 2,500 l/sec

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EDM Area – B at LANSCE

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EDM Area – B at LANSCE

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EDM UCN guide switch, exploded view

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EDM UCN Gate Valve

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EDM Area – B at LANSCE

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EDM Tasks Needed . . . .

• There are a number of tasks needed in order to accept UCNs into the test chamber:

• . Locate operational Helitran• . Finalize length of beam flight path, between test cell/trap and

gate valve• . Develop design for new simple switch – obtain a 6” Conflat

cross• . Quartz UCN beam guides with diamond coating• . Scroll pump to evacuate test chamber and beamline• . Electrical isolation from UCN beamline• . Possible additional tasks yet to be defined . . . . .