Laboratory Study of Atomic & Molecular Collision Projects ofAtmospheric Importance

进入地球大气层的高能带电粒子会引起大气加热、电离和光发射。要了解这些影响，就需要了解各种大气成分对这些颗粒的反应能力。这种能量传递能力的测量是在实验室横截面实验中进行的。本文提出的工作集中于精确测量绝对截面，它可以直接应用于预测粒子降水的空气后果的理论模型中。这项研究集中在与大气相关的物种之间的碰撞，特别是包括原子氧原子。将在质谱学、大尺度散射测量、O原子散射靶的产生和解离激发的研究方面实施新的技术。

Energetic charged particles precipitating into the earth's atmosphere cause atmospheric heating, ionization and optical emissions. The understanding of these effects requires the knowledge of the ability of the various atmospheric constituents to react to these particles. The measurement of this ability to transfer energy is done in laboratory cross-section experiments. The work proposed here focuses on the accurate measurement of absolute cross-sections which can be applied directly in theoretical models that predict the aeronomic consequence of particle precipitation. This research centers on collision in atmospherically relevant species, specially including the atomic oxygen atom. New techniques will be implemented for mass spectrometry, measurement of large scale scattering, production of O-atom scattering targets and study of dissociative excitation.