MINUTES OF RICH1 HPD & MECHANICS MEETING

Monday 30th April 2007
Present Bill Cameron, Dave Clark, Richard Plackett, Trevor Savidge, Gabriel Vidal & Dave Websdale.

Mirror Mechanics

The 'V' block with the machined compound angle correction required for the spherical mirror assembly has been completed.
The missing flat mirror plate feet should be completed by tomorrow. Two are being produced as a matter of urgency to complete the trial assemblies at CERN and two more will follow.
The brass 'claws' that are part of the adjuster mechanism for the flat mirrors will also be completed tomorrow.
The stops for the mirrors still have to be drawn and manufactured, but 'G' clams are sufficient for the trial assembly.
After these parts are completed there is little workshop time needed to complete the mirror assemblies.

Upper HPD Box

The HPD chariot end plates will go on the C+C machine next.
Drawings for the long spars are still required, will probably be ready by Thursday.
The long spars are complete in the model, with only the interface to the hard stop requiring a check with the magnetic shield model to ensure there are no incompatibilities.
The box design is nearing completion and comprises the following parts: of these the manifold, loft conversion and hard stop still require some design work.
The priorities for TS to follow are to produce the drawings for the long spars, the plinth pieces and the corner pieces.

HPD lower extraction rails

TS and possibly others will meet with Brian from Oxford to discuss the proposal for the lower HPD rail system on Wednesday.
The existence of a more complete model allows us to provide a more detailed envelope for the design interfaces.
TS requests that the deign is such that Brian can initially work independently from him for three or four weeks to allow progress to be made on the upper chariot.
Key points for the design will be to pursue the vertical concept, to have a rotation to horizontal in the cavern, to have a method of rotating the chariot 180 degrees from the assembly position before installation.

Minutes by Richard Plackett