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首页> 外文期刊>Geomagnetism and Aeronomy >O2 density and temperature profiles retrieving from direct solar Lyman-alpha radiation measurements
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O2 density and temperature profiles retrieving from direct solar Lyman-alpha radiation measurements

机译：通过直接的太阳莱曼-阿尔法辐射测量获得的氧气密度和温度曲线

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摘要

The resonance transition ^sup 2^P-^sup 2^S of the atomic hydrogen (Lyman-alpha emission) is the strongest and most conspicuous feature in the solar EUV spectrum. The Lyman-alpha radiation transfer depends on the resonance scattering from the hydrogen atoms in the atmosphere and on the O^sub 2^ absorption. Since the Lyman-alpha extinction in the atmosphere is a measure for the column density of the oxygen molecules, the atmospheric O^sub 2^ density and temperature profiles can be calculated thereof. A detector of solar Lyman-alpha radiation was manufactured in the Stara Zagora Department of the Solar-Terrestrial Influences Laboratory (STIL). Its basic part is an ionization camera, filled in with NO. A 60 V power supply is applied to the chamber. The produced photoelectric current from the sensor is fed to a two-channel amplifier, providing analog signal. The characteristics of the Lyman-alpha detector were studied. It passed successfully all tests and the results showed that the so-designed instrument could be used in rocket experiments to measure the Lymanalpha flux. From the measurements of the detector, the Lyman-alpha vertical profile can be obtained. Programs are created to compute the O^sub 2^ density, atmospheric power and temperature profiles based on Lymanalpha data. The detector design appertained to ASLAF project (Attenuation of the Solar Lyman-Alpha Flux), a scientific cooperation between STIL--Bul.Acad.Sci., Stara Zagora Department and the Atmospheric Physics Group at the Department of Meteorology (MISU), Stockholm University, Sweden. The joint project was part of the rocket experiment HotPay I, in the ALOMAR eARI Project, EU's 6th Framework Programme, Andoya Rocket Range, Andenes, Norway. The project is partly financed by the Bulgarian Ministry of Science and Education. [PUBLICATION ABSTRACT]
机译：氢原子的共振跃迁^ sup 2 ^ P- ^ sup 2 ^ S（Lyman-alpha发射）是太阳EUV光谱中最强和最明显的特征。 Lyman-α辐射的转移取决于大气中氢原子的共振散射以及O 2 2吸收。由于在大气中的莱曼-α消光是氧分子的柱密度的量度，因此可以计算其大气的O 2 2密度和温度分布。太阳莱曼阿尔法辐射探测器是由太阳地面影响实验室（STIL）的Stara Zagora部门制造的。它的基本部分是装有NO的电离相机。将60 V电源施加到腔室。传感器产生的光电电流被馈送到两通道放大器，以提供模拟信号。研究了Lyman-alpha检测器的特性。它成功通过了所有测试，结果表明，这种设计的仪器可用于火箭实验以测量Lymanalpha通量。通过检测器的测量，可以获得莱曼-阿尔法垂直轮廓。根据Lymanalpha数据创建程序以计算O 2 2密度，大气功率和温度曲线。探测器设计属于ASLAF项目（太阳莱曼-阿尔法通量的衰减），这是STIL-Bul.Acad.Sci。，Stara Zagora部门与斯德哥尔摩气象部门（MISU）的大气物理学组之间的科学合作瑞典大学。联合项目是火箭实验HotPay I的一部分，该项目是ALOMAR eARI项目（欧盟第六框架计划，挪威安第斯山脉安多亚火箭靶场）进行的。该项目部分由保加利亚科学和教育部资助。 [出版物摘要]

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