Minutes of IC RICH1 HPD column meeting
Monday 5th March 2007
Present: Geoff Barber, Bill Cameron, Dave Clark, Richard Plackett, and Dave Websdale
HPD ladders
A clarification that the number of type 1 and type 2 columns discussed at the last meeting means that we will have 4 type 1 and 2 type 2 columns in each half of the RICH.
6 end pieces are required to finish all 14 columns and the spares.
These 6 parts are the only pieces that remain to be anodised, hopefully these can be done this week.
HPD Box
Material for the frame trimmed to the width dimension, drawings are now required to make more progress.
Material for the bottom half arriving soon (today or tomorrow), although may be different form top half in design as this was weighted to lower centre of mass.
Machining of extraction rods can begin.
GE Door Supports
DC able to continue with door supports, L/R symmetry issues are understood.
Patch Panels
Ken Wyllie suggests that mock up patch panels be used to ensure that cabling occurs correctly RP to provide drawings. Later conversations indicate it is better to leave cables overlong to make detaching them easier, especially as the patch panel designs are not finalised.
Flat Mirrors
Geoff Barber reports.
Flat mirrors are supported by "short" and "long" rails.
The rails and brackets for the storage and installation box designed by Richard Head from Bristol are different from those in the gas enclosure and alignment rig.
Gas enclosure has 2 long and 4 short rails.
Alignment rig requires 1 long and 2 short rails.
Storage boxes require 4 shortened long rails and 4 short.
We also require 4 bridging rails for installation.
4 flat mirror adjusters parts are required. Bristol has produced 1 but it is unclear if they will make the remaining 3 in time.
It is possible these pieces could be made at IC, but would be better if they could be made externally at AC precision.
GB to phone Bristol and see what the schedule is and if adjusters can be made in time.
The mounting plates for the flat mirrors still require some machining. They also require carbon fibre tubes and blocks.
Spherical Mirrors
The bottom of the spherical mirrors are supported by V-blocks on a rail. 2 (one each on the outside) are large and are machined to size, and 2 are towards the centre, are small and are only used in installation, lifting off the rail when the mirrors are locked together.
The top of the spherical mirror is guided by a flat rail (designs for which exist as a 3d model)
This system will be replicated in the alignment rig.
Minutes taken by Richard Plackett