Updated with CPA#2 Status Successful completion of the first - PowerPoint PPT Presentation

CPA/FC#1-Observations- Ready for CPA#2 Vic Guarino William Miller Diamanto Smargianaki Bo, Steve, Frank & Jerry and a cast of others 18 November, 2017 Updated with CPA#2 Status Successful completion of the first CPA/FC proto 1 Dec 5, 2017

Preparation on the first CPA We put the first CPA together including the HV, field shaping strips and profiles only to discover that the lifting brackets that go over the joints would not fit with the profiles on. Doing this vertically was painful • Tom has modified the old brackets so they will work on the B type CPAs • Argonne is making a set new lifting brackets for CPA C proto 2 Dec 5, 2017

Lifting the CPA • Goal is to minimize the time required to have riggers lifting - The first CPA we used a dolly but on the second CPA we used a set of wheels attached to the bottom of the FC hinge this worked well - The G10 bar has been modified on both the top and the bottom so it rotates freely and allows us to align with the hanger easily. proto 3 Dec 5, 2017

Field Cages-Hinges Numerous changes should be made to the field cage procedure to simplify the lifting process • The hinges on all of the field cages were not checked for tightness. CHECK • Make some sort of gauge so the hinges are set to the correct distance and parallel so the pins lined up better • When placing pin, do not use the crane to pull/twist the hinge into place. Start by using a tapered bar on one side slow and steady, minimize using too much force. • Vic is sending nylon lock nuts to cover the end of the hinge bolts proto 4 Dec 5, 2017

Lifting the field cage Several modifications here: • On both the top and bottom Field Cage we need to make a nice lifting bar so we minimize back strain by using 3-4 people • Remove the last few cross bars on the sub-frame so they do not interfere with the location of the wheels-Kevin said we can do this • On the bottom FC the plate was reversed so the wheel gives better clearance as shown in drawing-they were upside down • On the first bottom FC we had the lifting plates on the inside on the second on the outside-Always on Lifting bar the inside-Check proto 5 Dec 5, 2017

Alignment attaching Top/Bottom Again several modifications which Argonne will fix before the next CPA • The lifting bar on the bottom fixture hit up against the bolt heads on the ground plane. DONE at CERN • The bracket mounted to the top FC needs to be narrower. The FR4 frame hits on it and did not allow us to get in place without lots of force- Argonne is making these, but we can hand round the corner at CERN • D rawing shows 3/8” bolts, holes are ½” needed better washers and No longer bolts- Vic is sending Clearance proto 6 Dec 5, 2017

General Comments • There were too many people in the cleanroom, extremely difficult to maneuver the man-lift, constantly telling people to and get out from under where we were working. Next time we need to JUST STOP and remove unneeded personnel • We were rushing too much to stick to the schedule, better planning to eliminate the need for riggers to stand and wait will help • Too much extra stuff in the cleanroom, need to purge tables, storage (PD test box), chairs, etc. made it difficult to maneuver the two tables and sub-frames • Access to the turn table was hard with field cages on, we had trouble getting the wheels over the lip • CRITICAL that you put C-Clamps on the CPA before rotation, it appears that you can still lose at least one wheel. It is easy to do and eliminates the issue • The cleanroom is a pig sty we need to do a much better job. Some trash bins outside will help. Before we move in the APA we should remove all of the CPA tools and store them in wheeled lockers so we can move them back in when we need them proto

Status of CPA#2 Parts • What we need: Modified Lifting Plates • I can’t find the ½” by 3” pins for • Modified FC standoff with slots installing the center support to (we had 4 but need 8) the CPA as shown on drawing • Kevin, Francesca and I DUNE-1-1-C discussed removing the end • We need the Diffuser for CPA-B2 few pieces of 8020 on the FC and a drawing to install them frames so they are not in the • Kevin said he can cut the way of the wheels-No Problem shoulder bolts for the G10 Bar Is there any reason we can’t build B3 first? We will have the tables and the crates in the SAS by the end of the day Monday proto 8 Dec 5, 2017