1. Last collaboration meeting B. Plaster nEDM February 2008 Collaboration Meeting Attention now focused on construction of a 1/2-scale prototype modified cos θ coil and ferromagnetic shield acrylic tube 24” O.D. 6’ + 1.5’ (glued) 3-ring set of acrylic “rings” Not “true” cos θ coil; wire positions optimized for uniformity in presence of ferromagnetic shield

2. Updated status of 1/2-scale coil B. Plaster Status Acrylic materials and drawings on hand since August 2007 Machining to be done at the Caltech HEP shop Plagued by delays at machine shop (i.e., were considered low priority) nEDM February 2008 Collaboration Meeting

3. Updated status of 1/2-scale coil B. Plaster nEDM February 2008 Collaboration Meeting Still delays … but some (recent) progress 90”-long, 24”-O.D. acrylic tube 72” + 18” now glued Locating slots machined Wednesday: Machine shop notified water-jet cutting of rings complete, but not yet transported to Caltech …

4. Last collaboration meeting B. Plaster nEDM February 2008 Collaboration Meeting Also in process of upgrading our automated mapping system to accommodate the 1/2-scale coil and the 1/2-scale dewar 27’-tall structure, Caltech HEP high-bay area Goal is first results (perhaps not best !!) by April/May/June time-scale

5. Status of magnet mapper B. Plaster nEDM February 2008 Collaboration Meeting Lots of progress here … Magnet mapping setup now exists in HEP/astronomy high-bay area Total height ~27 feet Accommodates 1/2-scale dewar 1/2-scale coil 1/2-scale ferromagnetic shield 1/2-scale Pb shield Translation hardware checked out Assuming coil is completed, still on track for April/May/June time-scale ~ 15 ’ (x,y,z) translation hardware