[Radhika, Stephen]
Instant gratification McMaster sourcing (PO S519341, submitted earlier today)
- metallized PET film (off-brand Mylar) in two thicknesses
- PEEK sheet in a few thicknesses
- G10 tube with ODs matching various apertures.
Should be able to integrate some of these items soon - they arrive Thursday, and Radhika will check to see if anything works for the setup as-is, or make requests for Stephen to cut on Friday.
future Mylar source - https://www.professionalplastics.com/MYLARFILM
- update: Radhika called Professional Plastics and they said we cannot order metallized mylar online, but we can call them back and place the order. Stephen called later and Sarah said she had to get a quote from a supplier, and will be in contact. Thickness range: 0.001-0.014 in.
future PEEK source - https://www.professionalplastics.com/PEEK_SHEET-ROD-BAR: thickness range: 0.25-2 in. (units not specified, but I assume inches).
future PEEK source - https://www.boedeker.com/Product/PEEK-Virgin-Natural: thickness range: 0.062-4 in.
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exp plot tip: If you use the "grid" feature of matplotlib and plt.semilogy(), the exponentials will look like straight lines, so we can just read off the time constants with a ruler.
Also, as we talked about earlier today, we should make some analytical estimates for the various heat loads, and also put them into the model.
For protecting from radiation, all of the surfaces which are NOT shiny-polished should get wrapped in something shiny (UHV Al foil, with the shiny side out).
I suggest wrapping with foil:
- Baseplate (to keep it from radiating into the cold plate (the tapped work surface))
- Copper strap (after first wrapping it with a sheet of Mylar to block conduction to the foil). Al foil should be wrapped with shiny side out.
- Plastic spacers. wrap around the length, but not the ends.
- Holes in the shields where the thermal strap enters. Edge the holes with a G-10 ring/grommet to prevent touching the straps.
I attach here a photo of the radiative shielding of a Purple Pepper Plant (PPP), to reduce the radiative coupling to the environment. This prevents the soil from drying out in the sun so fast.
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