A Theoretical Framework for Photoionization and Photodetachment Rate Calculations in the Lower Ionosphere

低电离层光电离和光脱离率计算的理论框架

• 批准号: 2010088
• 负责人: Victor Pasko
• 金额: $ 35.12万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2010088&HistoricalAwards=false
• 关键词: Theoretical; Framework; Photoionization; Photodetachment; Rate

This award will support the development of a modeling framework for photoionization and photo-detachment rates of metallic species generated by meteoric ablation events. The sources are multiple EUV, UV, and visible systems of O2 and N2 molecular band emissions that might be generated by transient luminous events (sprites, elves, lightning), auroral activity, and meteor trails. These results would make possible specific calculations for the D-region and lower thermosphere sporadic layers of possible localized effects upon ionospheric composition or ionospheric dynamics featuring spatial scales a few kms in extent. A graduate student and summer undergraduate students would be supported in this work.This work is based primarily upon the fact that the photo-ionization thresholds of metallic species is quite low relative to the ionization thresholds of other atmospheric constituents such as N2 or O2. Thus, the illumination sources of TLE, aurora, and meteor trails would be sufficiently energetic to achieve the ionization of neutral metallic species or the detachment of electrons from any ionospheric negative ions present within the region affected by meteors or precipitating electrons or TLE activity.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该奖项将支持由流星消融事件产生的金属物质的光电离和光分离率的建模框架的发展。这些来源是多个EUV，UV和可见光系统的O2和N2分子带发射，可能由瞬态发光事件（精灵，精灵，闪电），极光活动和流星轨迹产生。这些结果将使具体计算D-区域和低热层零星层可能对电离层组成或电离层动态产生的局部影响成为可能，其空间尺度为几公里。研究生和暑期本科生将支持这项工作。这项工作主要是基于这样一个事实，即金属物种的光电离阈值是相当低的相对于其他大气成分，如N2或O2的电离阈值。因此，TLE，极光，和流星尾迹将有足够的能量来实现中性金属物质的电离或电子从流星或沉淀电子或TLE活动影响的区域内存在的任何电离层负离子中的分离。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的评估来支持影响审查标准。

项目成果

Preliminary Modeling of Magnetized Sprite Streamers on Jupiter Following Juno's Observations of Possible Transient Luminous Events

根据朱诺号对可能的瞬态发光事件的观测，对木星上的磁化精灵流光进行初步建模

• DOI: 10.1029/2022ja031009
• 发表时间: 2023
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Janalizadeh, Reza;Pasko, Victor P.
• 通讯作者: Pasko, Victor P.

Conditions for Inception of Relativistic Runaway Discharges in Air

空气中相对论失控放电的开始条件

• DOI: 10.1029/2022gl102710
• 发表时间: 2023
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Pasko, Victor P.;Celestin, Sebastien;Bourdon, Anne;Janalizadeh, Reza;Jansky, Jaroslav
• 通讯作者: Jansky, Jaroslav

Implications of Electron Detachment in Associative Collisions of Atomic Oxygen Anion with Molecular Nitrogen for Modeling of Transient Luminous Events

原子氧阴离子与分子氮缔合碰撞中电子脱离对瞬态发光事件建模的影响

• DOI: 10.1029/2020gl091134
• 发表时间: 2021
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Janalizadeh, Reza;Pasko, Victor P.
• 通讯作者: Pasko, Victor P.