SCT EC Thermal Enclosure

Date: 6/03/06

Martin Gibson, Stephen Haywood & John Noviss (cc Jason Tarrant & MDG/TD-010)

http://hepwww.rl.ac.uk/atlas-sct/engineering/ec/endcap/TE/

News

Shipping on 1 Mar:

·  Wings & ITE#1 were shipped to CERN.

·  Rails, Membranes & Shunt Shields.

·  Miscellaneous fixtures.

Heater Pads:

·  Peter is looking at 2 cm gap and 4 mm bulge.

Heater Pad Wiring:

·  To be completed this week.

Membranes:

·  Martin’s tests indicate there may well be stresses. Consider adding folds into Rear Membrane and adding washers to allow slippage past bolts on SC.

·  Will need to produce some Membranes for future access (opening SCT will destroy current Membranes). Wait and see how integration of current design works. Former/tool needs to be remade to allow for larger holes.

Stiffener:

·  Need around end-April.

·  Start with left & right parts.
Martin’s first attempt to produce CF-foam sandwich for C&G Joinery failed due to problems with vacuum-bagging.

·  John needs to revisit to allow for Bubbler for top & bottom parts.

Fittings & Fixtures:

·  Inserts for Rear Flange (3 types) – on order; no rush.

·  For ITE fixtures, Martin will demonstrate a proposed crimping tool for use with washers.

RS Assembly

1.  Degrease Rear Wing – by 10 Mar.

2.  Add Litz wires to Rear Wing, according to TD-1012-732#3 – by 10 Mar.

3.  Cover holes with ³1 patches of Al-Kapton and Araldite 2011 – by 10 Mar.

4.  Modify 1st Rear Membrane: holes, slits, creases – 13/14 Mar.

5.  Modify 1st Foam Pad – 13/14 Mar.

6.  Assemble RS Assy – 14/15 Mar.

7.  Modify 1st Front Membrane: creases – 16 Mar.

8.  Modify 2nd Rear & 2nd Front Membrane and 2nd Foam Pad, as time allows; although may wish to await successful installation of 1st RS Assy.


Priorities (in order of importance)

John

1.  Picture of which holes on Rear Wing need to be covered; agreed by Jason – to send to CERN.

2.  Heater Pad locations & wiring; sign-off sheets (esp for Rear Support Assy) – by 10 Mar.

3.  While complete Heater Pads, check clearance with TRT and bend radius on OTE tabs.

4.  Update of Rear Support Assembly drawings.

5.  Revisit Stiffener/Spider for Brian – 1 day; wb 13 Mar.

6.  Communicate to Patrick about ITE mods:

·  Mods for N2 delivery in Clamps

·  Holes in Flange for inserts (or otherwise) – Martin to demonstrate crimper.

7.  Release drawings.

8.  Produce Inventory of what is still to be sent.

9.  Complete Stiffener drawings (top/bottom): need holes for bubbler & check aperture for pipes; get made in Workshop.

10.  Foam in-fill pieces for STFT around Cooling: make mods for DCS; get made in Workshop.

11.  Copy drawings to CDD.

Martin

1.  Prepare to visit CERN; post tools.

2.  Complete write-up for stress-relief of G&S Membranes.

3.  Prepare for tests of Helicoflex seals.

4.  Tool for lifting Front Membranes.

Stephen

1.  Copy Mins to MDG/TD-010.

Valencia & CERN

1.  Return Foam & Cu-Kapton (probably) when finished.

Helicoflex Seals:

·  WS skimming surfaces of connectors.

·  Checked Leak Detector – missing a filter – Leybold will send 6 Mar.

·  Need He.

·  Need regulators.

·  Have Mike’s instruction.

·  Need torque settings from Ian.


Task List for Thermal Enclosure

6 Mar 06

OTE

·  Drawing [JN, by 4 Mar; checked by Steve Carr]

·  Gasket design [JN, wb 7 Mar]

·  Procure materials [JN,PF]

·  Dry Airex

·  Alochrome or Ni-plate for Al [observe Barrel]

·  Manufacture CF Flanges & Ultem Inserts

·  Tests

o  Test stiffness and deformation.

o  Test with Short Test Cylinder (STC), by putting some simple adjustable rails on.

o  Test a prototype OTE band on End-cap using production Rails; check Service clearance.

RTE

·  Drawings & Work Instructions (understand how to make holes)

·  Ship Airex & Kapton to CERN – don’t ship Rear Support Panel (need to modify for Alignment targets)

·  Manufacture Inserts

·  Resolve G&S connection with ITE

ITE

·  Test Channel with Kapton

·  N2 Holes [PF]

·  Design filter [JN]

·  Support for assembly [where can this be tested?]

·  Drawings & Work Instructions

·  Ship Airex, Kapton & Foil to CERN

·  Modify ITE Clamps – for gas distribution pipes

Heaters

·  Discuss with Marko Mikuz.

Rails

·  Check Drawings [JN]

·  Some concern about precision of Inserts – good to test the pre-production Rail on SC in Lpool.

·  Decide number of Rails on how floppy the prototype is.

·  Two types of Rail designed: over Fixations need cut-outs.

·  Manufacture

LMT Cooling

·  Foil design

·  Clip design – in discussion with Jason

·  Assembly instructions

·  Manufacture of Foils, extra Clips (for LMT Cooling Pipes)

Membranes

·  Consider stiffness

·  Manufacture

Misc

·  Manufacture Top Hat Just need small additions – need dimensions of ITE.

·  Foam insulating ring between RTE and ITE – Martin; await dimensions of ITE

·  Foam Stiffener for STFT – Workshop; await approval of design

·  Corrugated pipe insulation in Stiffener – Workshop

·  Shunt Shields.

·  Foil shield for pipes in Stiffener – Martin

·  Kapton discs to cover cap-heads on FS/RS

·  Foil covers on Inserts

·  Potting Membrane to cover Tapes in STFT

·  Kapton tape to contain all End-cap services (under Rails)

Components Ready for Shipping:

Rear Wing Assemblies (end Feb):

·  Rear & Front Wings – need Alignment mods

·  Membranes: Front, Rear & Potting (see below)

·  Inserts

·  Screws – ordering

·  Shunt Shields, including Peek caps, Al clips – need to be made

ITE Assemblies (Feb?)

·  Filters, Peek Inserts, 300 mm holes

·  2nd ITE Cylinder

·  RS Clamps – need mods (when ITE completed)

·  Insulating rings (when ITE completed)

·  Top Hats (when ITE completed)

OTE and closure of TE/STFT (May?)

·  Rails, screws, nuts

·  Stiffener; corrugated pipe insulation; foil shield for pipes in Stiffener

·  Thermally insulating inserts for bolts.

·  Kapton discs to cover cap-heads on FS/RS

·  Kapton tape to constrain End-cap

·  Potting membrane