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Collaboration Meeting Update: New Cell Sizes for Experimental Research

Latest update from a collaboration meeting involving W&M and UVA discussing the successful filling of new cells for upcoming experiments, new ceramic oven construction, and considerations for cell sizes. Examine the pros and cons of different cell sizes and the glassblowing process for production.

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Collaboration Meeting Update: New Cell Sizes for Experimental Research

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  1. W&M Target Update Joe Katich 3He Collaboration Meeting, February 20, 2007

  2. Cells Filled So Far • W&M and UVa have each successfully filled one cell (one of each pull-off) – so it can be done! • Mike: Hard to make 3 ½” cell with these pull-offs, but he can do it. • Have not yet been tested, because there is no oven to test them in! • W&M constructed new ceramic oven to accommodate new cells (thanks Sabine Fuchs and Paul Black). Should be ready in ~1 month.

  3. 3 ½” 2 ½” Cell Size for Upcoming Experiments Some Brief History: GEn : made 3 ½” and 2 ½” pumping chamber cells (only used the 3 ½” cells in beam) – showed no difference in “lab” polarization. Oven Window

  4. 3 ½” 3” Cell Size for Upcoming Experiments • Plan is to make cells with 3” pumping chamber, but same length transfer tube – in practice, no reason to believe it won’t polarize just as well as GEn cells.

  5. Cell Size for Upcoming Experiments Pros and Cons: Pros: • Better polarization gradient – shorter transfer tube • Save some laser power • Easier for glassblower to make Cons: • Gen used 3 ½” cells and had best polarization ever • Jaideep and Aidan’s calculations predict polarization in 3 ½” cells would be marginally better

  6. Glass Blowing • Cell production will start right away • W&M purchase some old equipment of Willy’s to help set up his own shop – may be making cells for us again very soon

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