Cooling loops for prototype staves - PowerPoint Presentation

Slide1

Cooling loops for prototype staves

Update on cooling pipes progress Confirmation of design of loop Discussion on design developments of loops for future staves

Richard French

–

Sheffield

Ian Mercer

– Lancaster

Martin Gibson

– RAL

John Matheson – RAL

John Noviss – RAL

Ian Wilmut – RAL

Georg

Viehhauser

-

OxfordSlide2

Cooling pipe manufacture progress

Ian Mercer has made every single permutation of cooling pipe both Stave & Stavelet plus test pieces needed for the final phase of the project

.

Hold up is now the welding and fittings = me, SSC & industry.

We are running out of the 2.275mm Ti tube as this was a “trial” tube only.Working with DESY to get a second “joint” tube order underway with the EC community. – Early days so no promises, this is our ideal not necessarily theirs so monitor developments.Welding on 1/8” CP2 Ti now ready for full metallurgical testing – oxide battle now won with improved gas purity.Welding on 2.275mm CP2 Ti looks promising, still waiting for tooling from Sheffield workshop – currently overloaded (backlog from Irrad work) so could move elsewhere.UKtubeStock.xls: UK cooling tube stock list is on the TWIKI and is updated as we use by RF, MG, IM

Temporary test fittings for Ti:

Proving troublesome as looked at Vac brazing – low cost, a fast universally understood and well documented option.

Using Ni plating of the Ti – the plating then acts as a braze (joint only as good as plating

)

Downside is annealing effect on Ti – decided this shouldn’t matter for test circuits or simple weld on stalks.

Company (

Aerobraze

/Wall

Colmonoy

) and SSC excel sheet bank details – massive screw up. Never worked from the start, company redundancies mean new contact. Still on for 2011 delivery.

Can move to Bodycote but double cost as brazing not in-house.Slide3

Confirmation of design of loop

Drawings from Peter Sutcliffe are what we have been working from: Stave 09 cooling tube NP‐49‐01‐05 issue B. (pic)All cooling circuit & assembly drawings were on the TWIKI link- https://twiki.cern.ch/twiki/bin/view/Sandbox/TrackerExchange#5_7_Drawings_Stave_Stavelet_Test

Looks like this needs tidying up as all the original 1.2m long drawings have vanished from site

We have other options in

2.275mm OD x 0.130mm wall CP2 Ti3.175mm OD x 0.20mm wall CP2 Ti2.0mm OD x 0.20mm wall 316L stainlessAt what point does the baseline shift ?We are still working with the following baseline:1.2m Stave structure using a 316L Stainless Steel cooling pipe with a OD of 3.175mm and a wall of 0.22mm. This includes the SMC at the side of the staveSlide4

Discussion on design developments of loops for future staves

Material in Stave coreCP2 Ti looks good.DiametersMatch pressure spec from plant - ROUGH GUIDE 1

)

Size:

2.00mm OD x 0.10mm Wall x 3 Metre+/-10mm Cut Lengths.Qty/Price:150 Metres @ £ 41.75 per Metre.2) Size: 2.50mm OD x 0.12mm Wall x 3 Metre+/-10mm Cut Lengths.Qty/Price:

150 Metres @

£

38.25 per Metre

.

3)

Size: 2.275mm OD x 0.125mm Wall x 3 Metre+/-10mm Cut Lengths.Qty/Price: 150 Metres @ £ 44.50 per Metre.4) Size: 2.275mm OD x 0.10mm Wall x 3 Metre+/-10mm Cut Lengths.Qty/Price:150 Metres @ £ 46.75 per Metre.Length of tube that can now be manufactured is a problem under new EU REACH regulations.Need to demonstrate that a circuit can be made using only 3m not 3.2m as we are used to handling.

Other considerations:

Material

from z=1.2m

Thicker walled tube looks to be more suitable – define minimum.

Electrical break not defined

Diameters

Starting to shape up from

SoI

with input from George

NOT by any means final choice as there are stil

l some crazy people digging up the old presentations.

Joining

method

Orbital welding still favourite.

Need to prove:

Electronics damage

Repeatability