1. Step IV Construction North Side Walls and End Walls 20-27 May 2015 Stephen Plate, Brookhaven National Laboratory

2. Anchoring the upper shield plate to the framework at the west end 2

3. Installing one of four L-mounting brackets to the side walls at the west end. Brackets support the Virostek plates at each end and provide a continuous flux path into the side walls while accomodating tolerances. 3

4. West end, lower wall plate Adjustable cams react thrust loads from end walls Crossbar support brackets under mezzanine Crossbars react north and south sides against each other to reduce tension loads on floor anchors 4

5. View from northwest corner of mezzanine 5

6. View from east mezzanine Upper center section installed for fit-check only at this time 6

7. Installing first crossbar transfer drill at assembly; each of 7 crossbars is unique. 7

8. Present Status east and west end walls were installed, then removed to give access for installation of the spectrometer waveguides as planned all crossbars are now installed yet to be installed are the draw wires for measuring deflection under magnetic forces draw wire stanchions 8

9. Step V Design

10. Viewed from north side (3) one-piece center plates 2 removable sections for RF maintenance 10

11. Step IV leg spacing Downstream PRY expansion 11

12. Step V Status 12 detail drawings essentially complete, but will need: – positions of crossbars (J. Tarrant input) – access holes fro RF couplers 1 detail drawing needs to be completed 6 assembly drawings need to be completed – assy drawings will not hold up the fabrication Steel plates from Japan arrive Phila., PA around 11 July 12