本文關(guān)鍵詞： 月球 月塵 靜電遷移 月球塵埃實驗　出處：《巖石學(xué)報》2016年01期 　論文類型：期刊論文

【摘要】：空間環(huán)境中,暴露在太陽風(fēng)等離子體和紫外輻射中的塵埃顆粒由于光電發(fā)射等而帶電。月球光照區(qū)帶電的塵埃顆粒受靜電場驅(qū)動或微隕石轟擊發(fā)生遷移。本文計算結(jié)果表明,月球光照區(qū)粒徑為0.01μm的塵埃顆粒靜電遷移達到的最大高度約為1km,而在月球黑暗區(qū)亞微米級的塵埃顆粒靜電遷移可以到達50km的高度。盡管微隕石轟擊濺射的塵埃顆�？傻竭_~100km的高度,但是塵埃數(shù)密度與微隕石轟擊事件直接相關(guān),并隨著高度變化。由于重力作用,濺射的塵�？焖俪两�。濺射和沉降過程中,塵埃顆粒由于光電發(fā)射等繼續(xù)充電。在局部電場強度和德拜鞘高度分別為5V/m和1m條件下,粒徑0.37μm的帶電塵埃顆粒以"彈跳模式"運動,而粒徑0.37μm的帶電塵埃顆粒返回月表,并再次轟擊濺射塵埃。根據(jù)本文結(jié)果可以雅斷,月球塵埃實驗(LDEX)在月球夜晚20~60km高度記錄的塵埃事件可能與塵埃的靜電遷移相關(guān),但是月球白天記錄的事件可能并不包括靜電遷移的部分。
[Abstract]:In the space environment, dust particles exposed to solar wind plasma and ultraviolet radiation are charged due to photoemission, etc. The charged dust particles in the lunar illumination region are transported by electrostatic field or micrometeorite bombardment. The maximum height of electrostatic migration of dust particles of 0.01 渭 m in the illumination area of the moon is about 1km, while that of sub-micron dust particles in the dark area of the moon can reach an altitude of 50km. Although the micrometeorite bombarded the sputtered dust particles. The particle can reach the height of 100 km, But the dust number density is directly related to the micrometeorite bombardment events, and varies with the height. When the local electric field intensity and Debye sheath height are 5 V / m and 1 m respectively, the charged dust particles with the diameter of 0.37 渭 m move in the "bouncing mode", while the charged dust particles with the diameter of 0.37 渭 m return to the monthly table. According to the results of this paper, the dust events recorded by the lunar dust experiment LDEX at an altitude of 2060 km at night may be related to the electrostatic transport of dust. But the lunar events recorded during the day may not include a part of electrostatic migration.
【作者單位】： 中國科學(xué)院地球化學(xué)研究所月球與行星科學(xué)研究中心;中國科學(xué)院大學(xué);中國科學(xué)院地球化學(xué)研究所環(huán)境地球化學(xué)國家重點實驗室;
【基金】：supported by the National Natural Science Foundation of China(General Program:No.41373067 and Major Program:No.41490630) the Macau FDCT program(020/2014/A1)
【分類號】：P184

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