W&M TPC update, observa4ons & discussion topics 15 Dec, - PowerPoint PPT Presentation

W&M TPC update, observa4ons & discussion topics 15 Dec, 2016 Jeff Nelson (Ciaran Buteux, Will Henninger, Mike Kordosky, Devin Moore, Marco Colo, and John Bensel) 12/15/16 1

The Al profiles arrived IMG_20161209_1405 16748 12/15/16 2

Notes on the Al profiles • A number of the profiles have bends at the ends (below) – CuYng process? Don’t think shipping because the crate was in great shape (although carried under the driver arm when delivered) Laterally they fit nicely in the slots • They are a bit tall for the slots • – It takes force to put them in and they get scratches (right) The nuts and M4 hardware work nicely • Lighter is going to make installa4on in the 4ght space • much easier! The first 3 extrusions we pulled out 12/15/16 3

Ground plane notes Stand by the my statement that these are • beau4ful! A couple small things • – Each part has a copper colored region on the side flange – We guess it was the welder connec4on; could get around that by using stainless sandwich for the connec4on between the welder clamp and the ground – Loca4on where the pla4ng seems to have been etched or tarnished – The bends for the sides are rounded a bit and you cannot snug them up 1-2mm level 12/15/16 4

SloYng the ground planes • Since the holes (1/4”) are about the size of the perfora4ons, the holes had to be cuYng out sec4ons between the holes in most cases • Rotary tool and carbide tools for most holes – loud, but it works – Deburr the backsides aher ini4al cut 12/15/16 5

APA cleaning Water aher first cleaning Tools of the trade • Water from first pass on insides of tubes (clockwise from upper right) • Deionized water tank – luckily can get bulk from Chemistry; straight tube brush • Cable brush pulled through the bent regions • Cleaning trough w/wash & rinse sides Four stage cleaning: • Rough clean with acetone – Could not get all marker off – some baked in welds • Alconox scrub – 100 passes min to get a white cloth to come up clean – Many hours of scrubbing each – Soak rinse • Simple green – Soak for 15 min – Scrub with brush/drill/cable brush • Flowing water rinse with agita4on • Flowed methyl rinse with agita4on Aher process op4mized 4 person days for final cleaning – Parts were two-person lihs 12/15/16 6

Cleaned* mock APAs * Prior to final methyl wipe 12/15/16 7

Divider chain notes • Make a quick connec4on set up for tes4ng divider chains (Mike/Marco) – All of the divider chains survived shipping • Aher talking to the Lariat crew (Kearns @ BU) they inly used a flux cleaner and not an ultrasounds for cleaning – Planned to adopt that program unless people object • That cleaning is happening today • Since moun4ng hardware has to change form M5 to M4 when the Al profiles, need to add a washer to the board-side connec4on 12/15/16 8

Clean room geYng full – 4me to assembly 12/15/16 9

Added CPA and placed on ground 12/15/16 10

Add APAs The lower FC takes the load but don’t stop to admire un4l capture by top FC frames 12/15/16 11

Add top FC (captures APAs) 12/15/16 12

CPA-FC connec4on Temp hardware (will be M4 profile bolts) These inner most profiles will be bolted with shorter temp bolts for shipping and replaced in the pit 12/15/16 13

Issue with 1 of 8 APA weldments causing alignment issues welded with outward angle; bent it => berer 12/15/16 14

Tolerance build-up issue: floa4ng box beams should nest around CPA frame – too 4ght; Need to open up the gap today 12/15/16 15

Add FC walls frames Notes • The missing pins are due to the set of offset holes– will mark and slot out the holes today now that we know the right spots in the full assembly • Also tolerance build-up issues with the box beam and APA connec4on. We will slot these slightly to make this work berer in the field • Part of this was the 4lted APA weldment but not all • Remember this will be bad ergonomics when sliding this between the cryostat wall and the TPC so make it work simply • Bolts on ends are stainless – metal OK there? • Structural so need to be metal… 12/15/16 16

All but the top ground 12/15/16 17

Top ground set in place 12/15/16 18

Top ground set in place – planning to modify small center bits to fit new hanger block at FNAL when part in hand 12/15/16 19

All together now… 12/15/16 20

To-do list Today Through the weekend Make the fixes noted and Final soak and vacuum bake for • • reassemble fiberglass parts Photo op! Load profiles and divider chains • • Load profiles into one FC wall and Vacuum/Purge/Bag and over-bag • • look for deflec4on (Vic’s ask) parts Tag and bag parts as we Add travellers (bags opaque) • • disassemble Upgrade the failed ground plane • Cold test of APAs (for deflec4on crate (wall separated from base) • at midline) Monday Get lumber and make the FC • Loading crates • crates (2 of these) Tuesday Add endcaps to profiles • Ship! • 12/15/16 21

APA to diver to ground connec4on 12/15/16 22