量子电子学报2024，Vol.41Issue(2)：215-225,11.DOI:10.3969/j.issn.1007-5461.2024.02.004
电子激发高空大气辐射模拟装置的研制及初步应用
Development and preliminary application of electron-excited upper atmosphere radiation simulating setup
摘要
Abstract
The charge exchange and the energy transfer between Earth's upper atmosphere and high-energy electrons play an important role in the upper atmospheric luminous phenomena such as aurora and airglow.By building a ground-based simulating setup for electron excited high-altitude atmospheric radiation based on a vacuum system,the ionizing excitation of neutral molecules induced by electron impact and the corresponding radiative transition mechanism in the upper atmosphere are verified here.The device can create a vacuum gradients of more than 5 orders from 102 to 10-3 Pa,generate electrons with kinetic energy in 102-103 eV and monitor spectral transitions with wide range from near ultraviolet to near infrared.As an illustrated example,the setup has been applied to study the electron excitation of N2 and O2,the two main components of atmosphere,and their spectral distributions are measured and compared.It's found that the emission spectral intensity of N2 is not only positively correlated with electron energy,but also much higher than that of O2 under the same condition.Using the known spectral bands of the pure gases of N2 and O2,the excited spectrum of the actual atmosphere has been assigned,which shows that the emission bands of the air and pure N2 tend to be convergent,but the former's intensity decreases in some contents.These results demonstrate that the developed setup can be used to simulate the colliding excitation of middle and upper atmosphere components during the deposition of high-energy electrons.关键词
光谱学/电离光谱/电子激发/大气辐射/高空大气Key words
spectroscopy/ionization spectrum/electron excitation/atmospheric radiation/upper atmosphere分类
数理科学引用本文复制引用
何睿祺,刘向农,温作赢,顾学军,张为俊,戴聪明,李建玉,唐小锋..电子激发高空大气辐射模拟装置的研制及初步应用[J].量子电子学报,2024,41(2):215-225,11.基金项目
国家自然科学基金(42120104007,91961123),中国科学院合肥大科学中心重点研发项目(2020HSCKPRD001) （42120104007,91961123）
