A chamber for studying planetary environments and its applications to astrobiology
A chamber for studying planetary environments and its applications to astrobiology
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DOI：
10.1088/0957-0233/17/8/031
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发表时间：
2006-08-01
影响因子：
2.4
通讯作者：
Martin-Gago, J. A.
中科院分区：
文献类型：
--
作者：
Mateo-Marti, E.;Prieto-Ballesteros, O.;Martin-Gago, J. A.
我们已经建立了一个多功能的环境模拟室，能够再现大多数行星物体的大气成分和表面温度。特别是为了使所研究的样品的就地辐照和表征成为可能。燃烧室内的总压力可在5到5×10(-9)毫巴的范围内。所需的大气成分是通过残馀气体分析仪调节的，精度为ppm左右。温度可以设定在4K到325K之间。所研究的样品可以用离子源和电子源、氘紫外灯和惰性气体放电紫外灯进行照射。该装置的主要技术挑战之一是为用户提供在总压力为0.5mbar的情况下进行离子和电子辐照的可能性。这是通过一种高效的差动泵送系统实现的。实现的原位分析技术是紫外光谱和红外光谱。该仪器特别适用于在受控环境中跟踪特定样品在辐照过程中产生的化学变化。因此，它可以用于不同的学科，如行星地质学、天体生物学、环境化学、材料科学和仪器测试。
We have built a versatile environmental simulation chamber capable of reproducing atmospheric compositions and surface temperatures for most of the planetary objects. It has been especially developed to make feasible in situ irradiation and characterization of the sample under study. The total pressure in the chamber can range from 5 to 5 x 10(-9) mbar. The required atmospheric composition is regulated via a residual gas analyser with ca ppm precision. Temperatures can be set from 4 K to 325 K. The sample under study can be irradiated with ion and electron sources, a deuterium ultraviolet (UV) lamp and a noble-gas discharge UV lamp. One of the main technological challenges of this device is to provide the user the possibility of performing ion and electron irradiation at a total pressure of 0.5 mbar. This is attained by means of an efficient differential pumping system. The in situ analysis techniques implemented are UV spectroscopy and infrared spectroscopy (IR). This machine is especially suitable for following the chemical changes induced in a particular sample by irradiation in a controlled environment. Therefore, it can be used in different disciplines such as planetary geology, astrobiology, environmental chemistry, materials science and for instrumentation testing.