- Database
- Experimentalists
- Date
- 2015-01-01
- Provider
- IPAG
- Thickness
- 60.5 $\pm$ 2.5 $mm$
- Diameter
- 80.0 $mm$
- Volume
- 312000.0 $mm^3$
- Sample changes
- $CO_2$ sublimation: initial sample
- Substrate material
- cooper
- Substrate comments
- cylindrical 80mm diameter, 60mm deep
- Comments
- the CO2+H2O mixture is deposited over 5mm of martian analogue dust
- Temperature
- 148.15 $\pm$ 0.5 $K$
- Type
- molecular gas
- Fluids
-
- $CO_2$ 100.0 %
- Fluid temperature
- 148.15 $\pm$ 0.5 $K$
- Fluid pressure
- 6.47 $\pm$ 0.03 $mbar$
- Publications
- Number
- 3
- Arrangement
- CO2+H2O snow mixture deposited over a 5 mm thick flat layer of martian analogue dust
- Layers
-
- H2O ice , 0.5 $mm$
- CO2 snow with 1.5% H2O ice , 55.0 $mm$
- Volcanic tuff , 5.0 $mm$
- Title
- preparation of a mixture of H2O ice and CO2 snow
- Matters
- Sample
- CO2 snow with 0.10% of a PAH mix
- Processing steps
-
Step Chronology Date Type Process Changes #1 before layer formation 2015-01-01 mechanical grinding a monocrystal of H2O ice in cold chamber (-4°C) powdered H2O ice #2 before layer formation 2015-01-01 mechanical sieving powdered H2O ice between 250 and 280µm sieves in cold chamber (-4°C) 250-280µm powdered H2O ice #3 before layer formation 2015-01-01 fluid physical solidification of liquid CO2 droplets by decompression from a CO2 bottle with plunger within the SnowPack (R) device formation of a dense pellet (312.5 cm3) of $CO_2$ snow #4 before layer formation 2015-01-01 mechanical grinding CO2 snow 150µm powdered $CO_2$ snow (contain minor amount of H2O frost: ~0.03%) #5 before layer formation 2015-01-01 mixing mixing a weighted amount of sieved H2O ice with CO2 snow mixture of CO2 snow and H2O ice (weighted to determine the H2O mass fraction: 1.5%) #6 during layer formation 2015-01-01 layer formation filling the CarboN-IR cell at -125°C with 5mm of volcanic tuff plus some manual surface flattening flat homogeneous 5mm thick volcanic tuff layer (grains <25µm) #7 during layer formation 2015-01-01 layer formation filling the CarboN-IR cell at -125°C with 55mm of CO2 snow + H2O ice mixture plus some manual surface flattening flat 55mm thick homogeneous CO2 snow + H2O ice mixture layer over 5mm thick volcanic tuff layer #8 after layer formation 2015-01-01 pressure pumping air from the CarboN-IR cell at -125°C CO2 snow + H2O ice sample in thermodynamical equilibrium with CO2 gas - Comments
- some very thin and very fine grained layer of water ice may condense on the sample during closure of the cryogenic cell