Blanket Model since the AO
Currently the top of the thermal blanket is modeled as 32.7 mm
<composite name="blanket" density = "0.081">
<addmaterial material="Aluminum">
<fractionmass fraction="27" />
</addmaterial>
<addmaterial material ="Silicon">
<fractionmass fraction="144" />
</addmaterial>
<addmaterial material ="Oxygen">
<fractionmass fraction="70" />
</addmaterial>
<addmaterial material ="Carbon">
<fractionmass fraction="530" />
</addmaterial>
<addmaterial material ="Hydrogen">
<fractionmass fraction="26" />
</addmaterial>
</composite>
Final Design
Here is a link to the final design document.
Note the crown on the top, Bill asked that we attempt to retain our current volumes and adjust the density accordingly. We will neglect the crown at this time and continue to model the blanket as simple boxes on the top and four sides.
The blanket is constructed of mulitple layers of material:
Kevlar C21H15N3O3 6 layers on the top, 8 layers on the sides
Nextel Al2O3 (62.5%) SiO2 (24.5%) B2O3 (13%) 4 layers
Solomide Foam density = 0.005 g/cm3 Nor chemical formula is provided, we'll assume CH 4 layers, although this is not spelled out in the text but is derived from the numbers in section 7
MLI&Handling Layers density = 1.4 g/cm3 From the description sounds like mostly Kapton (C22H10N2O5)
The top has surface area of 32328 cm2 = (179.8 x 179.8)
The inside of the crown provides an additional 2022 cm2 = (158.0 x 3.2) 4
The thickness of the top can be comuted as:
MLI&Handling Layers: 0.07 cm
Solomide Foam: 4(0.65 cm)
Nextel: 4(0.043 cm)
Kevlar: 6(0.03 cm)
Total: 3.02 cm