Notes on FC cleaning & assembly at CERN Jeff Nelson, William - PowerPoint PPT Presentation

Notes on FC cleaning & assembly at CERN Jeff Nelson, William & Mary Jan, '17 DUNE - FC cleaning and CERN notes 1

Notes on cleaning & shipping Jan, '17 DUNE - FC cleaning and CERN notes 2

35t HV test TPC: 1 st experience trying to clean FRP parts Procedures: Compressed air blow • Dry wipe with clean rag • Chemical grade methyl and lint free Mssues • Apply epoxy to cut surfaces and let dry for 24 hours • [Assemble frames in clean room; handle with gloves from now on] Soak in simple green (80:1 deionized water, 15 minutes) then agitate • Agitated deionized water rinse • Bake in vacuum for 2 hours at 130-140F • Open and add the Al profiles/dividers/endcaps – concept scales for longer parts • Inner bag with vacuum/inert gas purge • Over bag with light vacuum to prepare for shipping • Crate for shipping • [ship] Open outer bag in staging area outside the cryostat (would be clean room in PD) • Open the inner bag inside the cryostat (would be clean room in PD) • Much of this was defeated by dust from the cutouts & holes in the machined FRP parts • I think all machined surfaces need an epoxy layer for aEached hairs and dust • Jan, '17 DUNE - FC cleaning and CERN notes 3

CW from upper right: bath, a frame in the oven under vacuum between structural (layers, vacuum port, the home built oven (heaMng elements were electrics barrel heaters). Jan, '17 DUNE - FC cleaning and CERN notes 4

Other cleaning protocols Small parts • Flowing methyl rinse Compressed air blow if not shipped in a vendor Rough dry with cloth • • bag (i.e. from a shop) Air dry in the clean room • Heated (60C) ultra sound bath 80:1 simple green • Bag • and deionized water for 20 minutes Larger plasMc parts (conducMve plates/strips Agitated deionized water rinse • Methyl scrub (lint free cloth) • Repeat 2 nd try • Flowing methyl rinse • Rough dry with cloth • Rough dry with cloth • Air dry in the clean room • Air dry in the clean room • Bake in an assembly or • Bake • Bag • Bag • Larger metal parts Circuit boards Alconix detergent with agitaMon for APA • Flux cleaning spray • Many passes on each part – Methyl wash (lint free cloth) • Steam cleaning the insides of the pipes would be the – Ran out of Mme to bake – way to go in the future Acetone wash for some darker weld marks • • Cleaning took MUCH more Hme than Methyl scrub (lint free cloth) • assembly (including profiles & divider chains) Jan, '17 DUNE - FC cleaning and CERN notes 5

Vacuum/inert gas purge heat sealer with gusseted edges Jan, '17 DUNE - FC cleaning and CERN notes 6

Shipping is always harder than people think Nothing worse than working for weeks and having it damaged in shipping • First SS profile box was shipped with heavy damage – over build all crates • – 25% of all of profiles were kinked by a fork lig breaking a skid and side wall – All parts had slid to one end and some were wedged between base and wall Al profiles had scratches from rubbing against each other • Mark the crates fragile and which “up” • – Al profile crate was shipped on its side Check that the crate’s skids match method of removal from truck • – Not compaMble with a pallet jack and needed fork lig to get it out of truck – It is inefficient Line the crates (or bag the parts • – Most crates didn’t have any lining and had lots of shipping dust/dirt/grime inside the crates We found that vibraMons from shipping rubbed sharpie off of labels – • either lock it down hard or provide padding The divider boards changed impedances when pressed and are the • exposed top components on the walls – Need to think carefully how to handle and constrain parts when bagged Jan, '17 DUNE - FC cleaning and CERN notes 7

All of the final shipments worked well – no signs of damage Jan, '17 DUNE - FC cleaning and CERN notes 8

Assembly as CERN Jan, '17 DUNE - FC cleaning and CERN notes 9

On the FC work at CERN • CERN will have the profiles and the ground planes on site • Francesco has idenMfied an assembly locaMon – Same space used for 1x1x3 assembly – Crane coverage and good loading dock – Clean storage space – Clean room with large assemble (opMcal) table – Gantry crane for moving frames in an out – Clean room back area for smaller parts work/desks • Some photos follow… it is a nice space to work Jan, '17 DUNE - FC cleaning and CERN notes 10

Dock area – clean room (to right) clean storage (to leg) Jan, '17 DUNE - FC cleaning and CERN notes 11

Looking out from the staging area Jan, '17 DUNE - FC cleaning and CERN notes 12

Looking in to the clean space Jan, '17 DUNE - FC cleaning and CERN notes 13

Inside looking out • \ Jan, '17 DUNE - FC cleaning and CERN notes 14