太阳质子事件对测试质量的影响,用于在第24个太阳周期中检测引力波
Ruilong Han1,2, Minghui Cai3,4, Tao Yang1
1State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, Beijing, 100190, China.
来自太阳质子事件 (SPEs) 的能量粒子可以充电基于太空的引力波 (GW) 测试质量,影响探测器的灵敏度. SPE的能量频谱结构,而不仅仅是流量,显著影响了收费率,在特定的太阳能周期年中风险最高.
科学领域:
- 太空物理空间物理学
- 天体物理学 天体物理学
- 引力波检测引力波探测器
背景情况:
- 自由落下的立方体测试质量 (TMs) 对于在太空中检测低频引力波 (GW) 是至关重要的.
- 暴露于能量粒子可能会导致TM的静电充电,引入不必要的力量,降低GW检测灵敏度.
研究的目的:
- 评估太阳质子事件 (SPE) 对TM的静电充电的影响.
- 在第24个太阳周期期间,利用GOES计划的高能质子数据分析TM充电动力学.
主要方法:
- 使用Geant4蒙特卡洛工具包,模拟在空间环境中的TM充电,用于SPE在三个流量范围 (10-100,100-1000,>1000 pfu) 中.
- 分析了与LISA和Taiji放电值相比的充电时间.
- 使用充电效率评估方法研究了集成流量和充电率之间的相关性.
主要成果:
- SPE充电可以在几秒到几个小时内达到关键值.
- 虽然净收费率和集成流量之间存在线性相关性,但对于>10 MeV SPEs,存在显著的偏差.
- 标志性企业的能源频谱结构被认为是决定收费率的主要因素.
结论:
- TM 的充电效率高度依赖于 SPE 的光谱特征.
- 第二十四个太阳周期的第三,第四,第五,第六和第七年是SPE的频率和充电风险最高的年份.
- 这些发现为未来引力波探测航天器的设计和运行提供了关键数据.
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