Development of comet nucleus simulation experiments

我们已开发的新方法，使amorphous icy grains:1) CO sublimation-induced disruptionmethodFirst, we deposited CO sample of 10mm thickness. Second，其中电影中的amorphous water ice是在CO. After deposited on the CO. After deposition，substrate was heated by turning off the helium refrigerator. At temperatures around 30k，corresponding to CO sublimation temperatures, the sublimation of CO occurred violentlyand this caused the disruption of the thin film of amorphous water ice.2)持续生产method by fast codeposition of H D22 D2O and CO D22 D2.We found that continuous disruption ofice film occurred during the deposition当deposition rate is larger than 3x10时D1-9 D1 m/s and when thickness of the film is larger thancritical thickness.In both method我们集体amorphous icy grains falling from the substrate using grain collector.这些方法enables us to perform comet nucleus simulation experiments than hitherto performed。

We have developed new methods for making amorphous icy grains:1 ) CO sublimation-induced disruption methodFirst, we deposited CO sample of 10 mm thickness. Second, thin film of amorphous water ice was deposited on the CO. After deposition, the substrate was heated by turning off the helium refrigerator. At temperatures around 30 K, corresponding to CO sublimation temperatures, the sublimation of CO occurred violently, and this caused the disruption of the thin film of amorphous water ice.2) Continuous production method by fast codeposition of HィイD22ィエD2O and COィイD22ィエD2.We found that continuous disruption of ice film occurred during the deposition , when deposition rate is larger than 3x10ィイD1-9ィエD1 m/s and when thickness of the film is larger than critical thickness.In both method, we collected amorphous icy grains falling from the substrate using grain collector. These methods enables us to perform better comet nucleus simulation experiments than hitherto performed.