| CPC H01J 49/0459 (2013.01) [G01N 33/18 (2013.01); H01J 49/0468 (2013.01); H01J 49/0495 (2013.01); H01J 49/24 (2013.01); H01J 49/4205 (2013.01)] | 12 Claims |
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7. A water-containing simulated lunar soil preparation and water content measurement method using a water-containing simulated lunar soil preparation and water content measurement system, the system comprising:
a water-containing simulated lunar soil preparation unit,
a low-pressure environment simulation unit, and
a water content analysis unit,
wherein the water-containing simulated lunar soil preparation unit comprises:
a preparation pipeline,
a low-temperature lunar soil cold trap filled with simulated lunar soil, and
a low-temperature water ice cold trap filled with solid ice;
wherein an end of the preparation pipeline is connected with the low-temperature lunar soil cold trap through a first switch valve, and an other end of the preparation pipeline is connected with the low-temperature water ice cold trap through a second switch valve;
wherein the low-pressure environment simulation unit comprises a low-pressure pipeline provided with a vacuum pump; and
wherein an end of the low-pressure pipeline communicates with the preparation pipeline through a first pneumatic valve, and an other end of the low-pressure pipeline is connected with the water content analysis unit through a second pneumatic valve;
wherein when a water content of water-containing simulated lunar soil is measured, the first pneumatic valve and the second pneumatic valve are opened and the low-temperature lunar soil cold trap is heated;
wherein the water content is measured by the water content analysis unit; and
wherein the water content analysis unit comprises a quadrupole mass spectrometer;
wherein the quadrupole mass spectrometer communicates with the second pneumatic valve through a flow regulating valve;
wherein a third pneumatic valve is provided between the first pneumatic valve and the second pneumatic valve; and
wherein a diaphragm gauge in communication with the low-pressure pipeline is provided between the third pneumatic valve and the first pneumatic valve;
wherein an ion gauge is provided between the third pneumatic valve and the first pneumatic valve; and
wherein the ion gauge is connected with the low-pressure pipeline through a fourth pneumatic valve,
wherein pressures of the low-pressure environment simulation unit and the low-pressure pipeline are to be kept at 0.1 Pa to 0.00001 Pa, and temperatures of the low-temperature lunar soil cold trap and the low-temperature water ice cold trap are to be 80 k to 350 k;
the method comprising the following steps:
S1: a preparation of the water-containing simulated lunar soil, the preparation comprising:
opening the first switch valve, the second switch valve, the first pneumatic valve, and the second pneumatic valve,
starting the vacuum pump to vacuum,
closing the first pneumatic valve and the second pneumatic valve after pressures in the low-pressure pipeline and the preparation pipeline are reduced to preset values,
regulating temperatures of the low-temperature lunar soil cold trap and the low-temperature water ice cold trap to enable the solid ice in the low-temperature water ice cold trap to melt and release water vapor to prepare the water-containing simulated lunar soil, and
closing the second switch valve after the water-containing simulated lunar soil is prepared successfully; and
S2: a measurement of the water content of the water-containing simulated lunar soil, the measurement comprising:
opening the first pneumatic valve and the second pneumatic valve,
heating the low-temperature lunar soil cold trap, and
measuring the water content by the water content analysis unit.
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