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

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

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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

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W&M TPC update,

  • bserva4ons & discussion topics

15 Dec, 2016 Jeff Nelson (Ciaran Buteux, Will Henninger, Mike Kordosky, Devin Moore, Marco Colo, and John Bensel)

12/15/16 1

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IMG_20161209_1405 16748

The Al profiles arrived

12/15/16 2

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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

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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

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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

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APA 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

Water aher first cleaning

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Cleaned* mock APAs

12/15/16 7

* Prior to final methyl wipe

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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

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Clean room geYng full – 4me to assembly

12/15/16 9

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Added CPA and placed on ground

12/15/16 10

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Add APAs

12/15/16 11

The lower FC takes the load but don’t stop to admire un4l capture by top FC frames

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Add top FC (captures APAs)

12/15/16 12

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CPA-FC connec4on

12/15/16 13

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

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Issue with 1 of 8 APA weldments causing alignment issues welded with outward angle; bent it => berer

12/15/16 14

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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

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Add FC walls frames

12/15/16 16

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…
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All but the top ground

12/15/16 17

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Top ground set in place

12/15/16 18

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12/15/16 19

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

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12/15/16 20

All together now…

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To-do list

Today

  • Make the fixes noted and

reassemble

  • Photo op!
  • Load profiles into one FC wall and

look for deflec4on (Vic’s ask)

  • Tag and bag parts as we

disassemble

  • Cold test of APAs (for deflec4on

at midline)

  • Get lumber and make the FC

crates (2 of these)

  • Add endcaps to profiles

Through the weekend

  • Final soak and vacuum bake for

fiberglass parts

  • Load profiles and divider chains
  • Vacuum/Purge/Bag and over-bag

parts

  • Add travellers (bags opaque)
  • Upgrade the failed ground plane

crate (wall separated from base) Monday

  • Loading crates

Tuesday

  • Ship!

12/15/16 21

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APA to diver to ground connec4on

12/15/16 22