USINE: Semi-analytical models for Galactic cosmic-ray propagation

I present the first public releases (v3.4 and v3.5) of the usine code for cosmic-ray propagation in the Galaxy (https://lpsc.in2p3.fr/usine). It contains several semi-analytical propagation models previously used in the literature (leaky-box model, 2-zone 1D and 2D diffusion models) for the calculation of nuclei (Z = 1 - 30), anti-protons, and anti-deuterons. For minimisations, the geometry, transport, and source parameters of all models can be enabled as free parameters, whereas nuisance parameters are enabled on solar modulation levels, cross sections (inelastic and production), and systematics of the CR data. With a single ASCII initialisation file to configure runs, its many displays, and the speed associated to semi-analytical approaches, usine should be a useful tool for beginners, but also for experts to perform statistical analyses of high-precision cosmic-ray data.

本文发布了用于银河系宇宙线传播的usine代码的首个公开正式版本（v3.4与v3.5），相关官方网址为https://lpsc.in2p3.fr/usine。该代码集成了此前文献中已应用的多款半解析传播模型，包括漏箱模型（leaky-box model）、双区域一维与二维扩散模型，可用于计算原子序数Z=1至30的原子核、反质子以及反氘核。在参数最小化流程中，所有模型的几何结构、输运过程与源参数均可设置为自由参数；而太阳调制水平、非弹性与产生截面以及宇宙线数据的系统误差项，则可配置为讨厌参数。仅需单个ASCII格式初始化文件即可完成运行配置，搭配丰富的可视化功能以及半解析方法自带的高效运算速度，usine代码既适合初学者入门使用，也可助力专家开展高精度宇宙线数据的统计分析工作。