Thermal Shield Update Niklas Templeton 15/02/16 (final update of placement  )

Summary of design discussions 10/02/16 Top plate configuration Both designs are feasible for manufacture a. is inherently more stiff but also more complex for fabrication Modal and Structural analysis determined that the b. Top plate is sufficiently stiff No modes below 25 Hz Deformation due to gravity (sagging) <0.5 mm Critically, b. is preferred for MLI dressing purposes a. b.

Summary of design discussions 10/02/16 Fabrication In-house welding of Aluminium is not qualified Welding tests to be arranged Alternative connection options are to be explored and analysed Friction stir welding, pipe with integrated fin/flange, pipe-panel sandwich, Clamps, filler materials, etc. Minimise pipe weld operations Updated cooling analysis required with point connections/bonds Shield must not be over constrained for cool down Consider the use of Copper? Quick comparison concluded that a copper shield would require significant reinforcement along with increased cost and mass Aluminium design to be developed further Copper Shield Mass: ~240kg Aluminium Shield Mass: ~80kg

Summary of design discussions 10/02/16 Cooling Anlaysis showed conduction cooling acceptable for side and end panels Initial cool down analysis required for worst case operating condition Single ‘U’ rib stiffener sufficient for Al shield design, optimal for manufacture and assembly Biphase line height to be increased my 10 mm for increased HOM Cooling fluid level Shield height & width to be revised

Further updates - Top plate cooling circuit modified for assembly purposes

Further updates – Pipe connection proposal 9 Lateral Fixed connection points 2 Floating clamp connections for FPC thermalisation