H2O ice layer over CO2 snow with 1.5% H2O ice | GhoSST

Sample

Name: H2O ice layer over CO2 snow with 1.5% H2O ice

Owner of sample

Database

GhoSST

Experimentalists

Origin of sample

Date: 2015-01-01
Provider: IPAG
Previous sample: CO2 snow with 1.5% H2O ice
Parent sample: CO2 snow with 1.5% H2O ice

Image

Evolution of the

C O_{2}

$CO_2$ snow sample mixed with 1.5%

H_{2} O

$H_2O$ ice: B) after 0h30 sublimation (t4); C) after 0h40 (t5); D) after 0h50 (t6); E) after 2h30 sublimation (t14) [Philippe 1996]

Physical characteristics

Diameter: 80.0 $mm$
Sample changes: $CO_2$ sublimation: growth of top H2O layer. Surface area: 62 $^{+1.3}_{-1.3}$ %, thickness: 48 $^{+1.6}_{-1.6}$ µm, mean grain size: 279 $^{+30}_{-43}$ µm; 1µm frost: 5.72 $^{+0.95}_{-1.52}$ %
Substrate material: cooper
Substrate comments: cylindrical 80mm diameter, 60mm deep
Comments: sublimating CO2+H2O mixture deposited over martian analogue dust with an initial thickness of 55 mm decreasing with time

Sample environment: Temperature

Temperature: 148.15 $\pm$ 0.5 $K$

Sample environment: Fluid

Type

molecular gas

Fluids

$CO_2$ 100.0 %

Fluid temperature

148.15

\pm

$\pm$ 0.5

K

$K$

Fluid pressure

6.47

\pm

$\pm$ 0.03

m b a r

$mbar$

Sample environment: Irradiation

Source: Halogen lamp
Chronology: before spectrum

Particle

Family: photons
Type: Vis photons

Radiance

Radiant flux: 2250.0 $\pm$ 100.0 J.s-1.m-2

Source: Halogen lamp
Chronology: before spectrum
Irradiation time: 10.0 $\pm$ 0.25 $min$
Comments: the time is the total illumination time since start of experiment

Radiance

Radiant flux: 2200.0 $\pm$ 100.0 J.s-1.m-2
Radiant fluence: 1320000.0 $\pm$ 93000.0 J.s-1.m-2

Documentation and publication

Publications

Philippe, 2016, 1 - 379

Layers in sample

Number

Arrangement

heterogeneous H2O ice layer developing during sublimation on top of the CO2+H2O snow mixture deposited over a 5 mm thick flat layer of martian analogue dust

Layers