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Engineering Update E. Doyle 5/16/06

Published byMarika Noora Kapulainen Modified over 5 years ago

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Presentation on theme: "Engineering Update E. Doyle 5/16/06"— Presentation transcript:

1 Engineering Update E. Doyle 5/16/06
LARP Phase II Secondary Collimator RC1 Prototype Engineering Status 5/16/06 Evaluation of separate shaft/hub concept Engineering Update E. Doyle 5/16/06

2 Baseline Jaw Performance (deflections referred to edge of jaw)
Exceeds spec, or other possible problem as noted Baseline: hollow Cu, 25mm wall, helical cooling - 5cm pitch Max Cu temp 200 Possible boiling Max water return temp Deflection 325 & 750 (SS & trans) All temperature simulations based on 20C supply. For CERN 27C supply add 7 to all temperature results. CERN max water return temp 42C Engineering Update E. Doyle 5/16/06

3 Detail-refinements to RC1 Concept
More cooling – reduce pitch of helix Add solid Cu core d reduced 60% but still exceeds 25um spec d referred to central meets spec for ss baseline Solid Cu, more cooling baseline Solid Cu, more cooling Engineering Update E. Doyle 5/16/06

4 Idea to Eliminate Central Stop
Engineering Update E. Doyle 5/16/06

5 Jaw with Shaft – Deflections Referred to Shaft Ends
~ 50% reduction in deflection Doesn’t meet 25um spec add temperature compensation? Continue development of central stop Engineering Update E. Doyle 5/16/06

6 Jaw with Shaft – Deflections Referred to Central Stop at 45o to Beam
deflection somewhat worse on this basis (?) But deflection of jaw end support springs is reduced by ~ 2/3 alternate materials, geometry mods may yield further improvements Deflection of jaw end support springs greatly reduced Engineering Update E. Doyle 5/16/06

7 Engineering Update E. Doyle 5/16/06
Questions Re jaw auto retraction is the stepper open circuit in a power outage? (for min detent torque) May we consider using counterweights to balance jaw weight? Re jaw positioning Will CERN consider temperature compensation? Cooling system What is limit on return water temp (42C?) Drawing discrepancies Will communicate by Engineering Update E. Doyle 5/16/06

8 Engineering Update E. Doyle 5/16/06
Counterbalanced jaws Engineering Update E. Doyle 5/16/06

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