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Here is a link to the final design document.
Note the crown on the top, currently we model the blanket as simple boxes on the top and four sides.
The blanket is constructed of mulitple layers of material:
Kevlar C21H15N3O3
56 cm radiation length
6 layers on the top, 8 layers on the sides
Nextel Al2O3 (62.5%) SiO2 (24.5%) B2O3 (13%)
42 cm radiation length
4 layers
Solomide Foam density = 0.005 g/cm3
No chemical formula is provided
Material properties 0.0036 g/cm2
0.65 cm thickness/layer (density 0.0055 g/cm3)
according to the final design document, Composition similar to that of Kapton. Equivalent thickness of Kapton determined by scaling by the density = 0.010 cm
Radiation length of Kapton 28.2 cm
MLI&Handling Layers density = 1.4 g/cm3
Thickness 0.07 cm total of all materials
Area density 0.098 g/cm2
Radiation length 28.2 cm
From the description sounds like mostly Kapton (C22H10N2O5) The only other material explicitly mentioned is Germanium, but after consulting with Dave Thompson (GSFC) it was decided that could be ignored..it only contributes 1000 Angstroms, or 0.00001 cm.
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The thickness of the top can be computed as:
MLI&Handling Layers: 0.07 cm
Solomide Foam: 4(0.65 cm)
Nextel: 4(0.043 cm)
Kevlar: 6(0.03 cm)
Total Thickness: 330.02 cm22 mm
From Section 7 of the Final Design Document: Top ( 6 layers Kevlar): 0.137 + 0.119 + 0.015 + 0.098 = 0.36 g/cm2
Top 0.36 g/cm2 x 34350 cm2 = 12366 g
Top ignoring crown 0.36 g/cm2 x 32328 cm = 11638.08 g
Density: 0.36 g/cm2 / 3.02cm = 0.12 g/cm3
Determining how to model the material
Solomide Foam (modeled as Kapton): 32328 cm2 (2.6 cm) (0.0055 g/cm3) = 462.29 g
C22H10N2O5 1 mole = 22(12.011) + 10(1.0079) + 2(14.0067) + 5(15.9994) = 382.33 g
462.29 g / 382.33 g = 1.21 moles
22(12.011)(1.21) = 319.73 C
10(1.0079)(1.21) = 12.20 H
2(14.0067)(1.21) = 33.90 N
5(15.9994)(1.21) = 96.80 O
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C | H | N | O | B | Al | Si |
|---|---|---|---|---|---|---|
319.73 | 12.20 | 520.21 | 594.22 | 154.89 | 1269.21 | 439.54 |
3122.62 | 187.17 | 232.23 | 663.18 |
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|
|
2190.57 | 83.55 | 33.90 | 1128.91 |
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|
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|
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| 343.86 |
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|
|
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| 96.80 |
|
|
|
|
|
| 500.78 |
|
|
|
3442.35 g | 282.92 g | 786.34 g | 3327.75 g | 154.89 g | 1269.21 g | 439.54 g |
Total: 9703 g
Mass Fractions:
C: 3442.35/9703 = 0.355
H: 282.92/9703 = 0.029
N: 786.34/9703 = 0.081
O: 3327.75/9703 = 0.343
B: 154.89/9703 = 0.016
Al: 1269.21 / 9703 = 0.131
Si: 439.54 / 9703 = 0.045
Side
Outer surface area: (179.8 cm x 91.8 cm) = 16505.64 cm2
MLI&Handling Layers: 0.07 cm
Solomide Foam: 4(0.65 cm)
Nextel: 4(0.043 cm)
Kevlar: 8(0.03 cm)
Total: 3.08 cm
From Section 7 of the Final Design Document: Top ( 8 layers Kevlar): 0.182 + 0.119 + 0.015 + 0.098 = 0.41 g/cm2
Top 0.41 g/cm2 x 16505.64 cm2 = 6767.31g
Density: 0.41 g/cm2 / 3.08 cm =0.13 g/cm3
Solomide Foam (modeled as Kapton): 16505.64 cm2 (2.6 cm) (0.0055 g/cm3) = 236.04 g
C22H10N2O5 1 mole = 22(12.011) + 10(1.0079) + 2(14.0067) + 5(15.9994) = 142.94 g
236.04g / 142.94 g = 1.65 moles
22(12.011)(1.65) = 436.00 C
10(1.0079)(1.65) = 16.63 H
2(14.0067)(1.65) = 46.22 N
5(15.9994)(1.65) = 132.00 O
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