Model CRAC:EPII for atmospheric ionization due to precipitating electrons: Yield function and applications
Model CRAC:EPII for atmospheric ionization due to precipitating electrons: Yield function and applications
复制标题
模型 CRAC:EPII 用于由于电子沉淀而导致大气电离：屈服函数和应用
DOI：
10.1002/2015ja022276
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
I. Usoskin
中科院分区：
文献类型：
--
作者：
A. Artamonov;A. Mishev;I. Usoskin
本文提出了一个新的CRAC模型CRAC：EPII（Cosmic Ray Atmospheric Cascade：Electron Precipitation Induced Ionization）。该模型计算大气电离引起的沉淀电子和使用电离产额函数的形式主义。CRAC：EPII模型基于电子传播和与空气分子相互作用的完整Monte Carlo模拟。它明确地考虑了各种物理过程，即对产生，康普顿散射，产生韧致辐射高能光子，光电离，正电子湮灭和多重散射。使用GEANT 4模拟工具PLANETOCOSMICS和NRLMSISE 00大气模式进行模拟。CRAC：EPII模式适用于整个大气层。模拟结果以表示电离产率函数的查找表形式给出。该表允许一个计算电离由于沉淀电子为给定的高度和位置考虑给定的电子光谱。应用该模型计算电子沉淀事件期间的离子产生，使用从气球上的测量光谱。
A new model of the family of CRAC models, CRAC:EPII (Cosmic Ray Atmospheric Cascade: Electron Precipitation Induced Ionization), is presented. The model calculates atmospheric ionization induced by precipitating electrons and uses the formalism of ionization yield functions. The CRAC:EPII model is based on a full Monte Carlo simulation of electron propagation and interaction with the air molecules. It explicitly considers various physical processes, namely, pair production, Compton scattering, generation of bremsstrahlung high‐energy photons, photoionization, annihilation of positrons, and multiple scattering. The simulations were performed using GEANT 4 simulation tool PLANETOCOSMICS with NRLMSISE 00 atmospheric model. The CRAC:EPII model is applicable to the entire atmosphere. The results from the simulations are given as look‐up table representing the ionization yield function. The table allows one to compute ionization due to precipitating electrons for a given altitude and location considering a given electron spectrum. Application of the model for computation of ion production during electron precipitation events using spectra from balloon‐borne measurements is presented.
在通量丢失事件期间从南极洲观测到的高能电子降水特征
DOI：
10.1002/2013ja019067
发表时间：
2013
期刊：
Space Physics
影响因子：
--
作者：
Clilverd M
通讯作者：
Clilverd M