QMUL 2/2/12 1  Current status of new alignment system.  Drawing status update.  Laser alignment.  Module removal from frames for new kit.  Stave(lets ) for 2012  Module frame thoughts.  IV tests and silicon

Current state of the new alignment system.. But about 50% of it has to be dismantled for the granite in mid Feb started now Light curtain Tx Prototype laser Light curtain mirror

Drawing Status David Mongomery (Marks’s Ex boss) has contacted Mark on his mobile. Apparently he sent a package to me with drawing etc. Unfortunatley nothing has arrived. David has printed off the list of models Mark was working on. MDG now trying to decide just what it all means. David to arrange a meeting with Ian and myself to see just who will be doing the work. 3

Laser support 4 Where we started from using standard optical components Where we finished. With a custom support. Awaiting it’s cover Laser module ND filter pinhole Aluminium reference support for granite

Completed X,Y,Z,Theta stage set for removing modules onto vacuum jig by support from underneath 5

Summery of Stave(let) to build in 2012 Shield studies stavelet. (C channel, presumably single sided ?) Could use existing frame. If not fitted with locking points. Note:- we only have one C channel frame. We could have 2 if we fit modified pins to the other (US) frame. But.... Stavelet 4 (probably made by the US so not our problem hopefully! But see above) Electrical stave 250 (still to be confirmed, may be double sided) Might fit existing frame BUT may need support for EOS card. Perhaps this needs a drawing?. Again no locking points. Electrical stavelet (130nm). Probably needs new frame. 6

7 Option 1 Modify locking point Option 2 Make temporary extension

8 Option 3 Make wider core

9 Option 4 Make more offset BCC

10 Option 5 Make 2 part locking point

11 Option 6 With a change of module

FORAGAINST Option 1, modify locking point Moves locking point awayNeeds yet another set of moulds etc for a temporary problem. Option 2, Make temporary custom ext Means that the 120mm stave are OK. No need to modify anything Extra leaverage. Increases frame width Option 3, wider core Keeps stiffnessNeeds new jigs etc etc Option 4, modify BCC No chance Option 5, 2 part clamp neatNeeds more design and R+D. Removal for re-work not nice! Post construction fitting not good. Option 6, new module neatLong term... 12

Thoughts.. Separate out the locking point problem from the stave population. If we make an temporary extension piece then everything we have (with the exception of the new frame) works as before. As far as mounting tests go, one can make special narrow version of the core. We can make special wide frames if we want to use extension pieces to prove the point. We can say very little about the new modules BUT it is important that the module, stave, locking point, frame designers and module placement people all talk to each other. At the moment we are very disconnected! Only one constraint.. the granite and hence the distance apart of the two walls has a maximum value of approximately 385mm Meaning the frame can not be wider than 380mm approximately But this needs to be checked on a drawing

What to test re... Iv’s Aim is to measure I/V. Objective is to prove adhesive has no effect...So.. Perform I/V on naked silicon, or a module depending on what I receive. Stick onto dummy stavelet. ( I have such an item but with no cooling tubes) Measure I/V after cure at room temp. Cycle between +30 and -60 and then re-measure at room temp. (We can place the whole stavelet into our environmental chamber and we have a box that we can flood with N2) Measure I/V at +30 and at -60. (we can do this inside the chamber) Cycle a number of times Re-measure. Awaiting offer of silicon from Ashley If we do not do this, what are we going to use to stick modules onto our next stavelet? This is the SP shield studies stavelet that was/is expected in Jan