Simulation and analysis of the LUCID experiment in the Low Earth Orbit radiation environment
Simulation and analysis of the LUCID experiment in the Low Earth Orbit radiation environment
复制标题
近地轨道辐射环境LUCID实验模拟与分析
DOI：
10.1088/1742-6596/513/2/022038
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
M. Harrison
中科院分区：
文献类型：
--
作者：
T. Whyntie;M. Harrison
兰顿终极宇宙射线强度探测器实验是一个卫星装置，将使用5个Timepix混合硅像素探测器，对大约635公里高度，即低地球轨道的辐射环境进行测量。该实验定于2014年在萨里卫星技术有限公司（SSTL）的TechDemoSat-1上发射。Timepix探测器由Medipix协作开发，被安排成一个由0.7毫米厚的铝“圆顶”包围的立方体的五个侧面，并将在超过阈值的时间模式下操作，以允许测量入射电离辐射的通量，能量和方向性。为了估计这些测量的预期数据速率，LUCID实验已经使用GEANT 4软件框架进行了建模。作为这些模拟的一项投入，使用了欧空局的空间环境信息系统SPENVIS和美国航天局的AP-8和AE-8模型，以获得TechDemoSat-1轨道上捕获质子和电子的估计通量。开发了一个门户网站LUCIDITY，允许LUCID协作组织的学生管理SPENVIS通量谱和GEANT 4输入卡。这里报告的初步结果证实，LUCID的数据传输余量是足够的，并提出了进一步的工作，将技术应用到更具体的空间辐射环境与更复杂的模拟。
The Langton Ultimate Cosmic ray Intensity Detector (LUCID) experiment is a satellite-based device that will use five Timepix hybrid silicon pixel detectors to make measurements of the radiation environment at an altitude of approximately 635 km, i.e. in Low Earth Orbit (LEO). The experiment is due to launch aboard Surrey Satellite Technology Limited's (SSTL's) TechDemoSat-1 in 2014. The Timepix detectors, developed by the Medipix Collaboration, are arranged to form the five sides of a cube enclosed by a 0.7 mm thick aluminium "dome", and will be operated in Time-over-Threshold mode to allow the flux, energy and directionality of incident ionising radiation to be measured. To estimate the anticipated data rates with respect to these measurements, the LUCID experiment has been modelled using the GEANT4 software framework. As an input to these simulations, SPENVIS, ESA's Space Environment information system, was used to obtain the estimated flux of trapped protons and electrons in TechDemoSat-1's orbit with NASA's AP-8 and AE-8 models. A web portal, LUCIDITY, was developeded to allow school students from the LUCID Collaboration to manage SPENVIS flux spectra and GEANT4 input cards. The initial results reported here confirm that the LUCID's data transmission allowance is sufficient, and further work applying the techniques to more specific space radiation environments with a more sophisticated simulation is proposed.