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Message ID: 36     Entry time: Monday, June 05, 2017, 16:16
Author: Isaac Earle 
Category: BL4N 
Type: Development 
Subject: BL4N 35-deg bender stand assembly complete 

Assembly of two complete bender stands was completed on Friday June 2nd as well as installation of new hardware on the dipole magnets for support, adjustment, and seismic restraint.  All parts were installed according to drawing TBP1804.

One of the frames was assembled with the caster wheel configuration.  This frame was pushed from the proton hall B2 level to its final installation location in the ARIEL tunnel.  The frame was a tight fit around the first corner around BPM 26 but it could still pass by without having to remove any items including the electrical boxes on the right side of the tunnel (when facing towards ARIEL).  Part of the grouting for the BPM 26 support stand and the next three stands after that was ground away to allow more clearance for the frame.  The nut/bolt on the frame casters on one side were swapped which also provides an additional ~1/8" clearance.  After these modifications the stand was pushed out past this area and then back to its installation spot confirming that there is now ample clearance.

The other frame was assembled in the configuration with stand legs.  This frame has been moved to the proton hall extension loading bay to be used for magnet field testing.

Both dipole magnets have been assembled with the new adjuster blocks and support legs.  For the magnet labeled “No.01” the original support legs were removed, cleaned in the ultrasonic cleaner, and then reassembled with way oil  The support leg support pads (TBP1822) were replaced with new parts, but all other parts were reused.  For the other magnet, labeled “No.03”, new support legs were fabricated because it was supported differently in its previous location and did not have these parts.  The fasteners attaching the adjuster blocks and support legs to the magnets were torqued to the recommended torque for each fastener based on the fastener grade and size.

Various minor changes to the design were made since the release of drawings, primarily to improve ease of manufacture.  As-built drawings will be released after the magnets have been installed on the stands in case additional changes arise.

 

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