Element Composition of High Energy Solar Particles

高能太阳能粒子的元素组成

• 批准号: 0838839
• 负责人: Paul Evenson
• 金额: $ 25.31万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-05-01 至 2015-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0838839&HistoricalAwards=false
• 关键词: Element; Composition; Energy; Solar; Particles

This proposal seeks funding to enhance the capability of IceTop (a surface array of detectors complementing the IceCube Neutrino Observatory built at the South Pole Station) to determine element composition of solar energetic particles in the energy range 1-10 GeV. This will be accomplished by recycling components of the former South Pole neutron monitor to construct an enhanced suite of new detectors whose response functions (primarily due to hadrons) have a different dependence on energy and element composition from those of the IceTop detectors - primarily due to photons and leptons. The proposed project will advance understanding of the acceleration and transport of solar energetic particles with the specific focus areas of the research in the following: (a) deploying an instrument with unique sensitivity to the relative abundance of protons and helium nuclei in solar flare-related particle events at energies above 1 GeV; (b) determining helium abundance for about ten Ground Level Enhancements (GLE) events expected to occur during the project's lifetime through 2014; and (c) putting this information into the context of data on solar energetic particles at lower energy and other observations (optical, radio, X-ray, etc) of these flares. The project will provide data relevant to important societal issues such as space weather studies and enhance the usefulness of data from other instruments.

该提案寻求资金，以提高IceTop（南极站建造的IceCube中微子观测站的一个表面探测器阵列）确定能量范围为1-10 GeV的太阳高能粒子的元素组成的能力。这将通过回收前南极中子监测器的组件来实现，以构建一套增强的新探测器，其响应函数（主要是由于强子）对能量和元素成分的依赖性与IceTop探测器不同-主要是由于光子和轻子。拟议的项目将增进对太阳高能粒子加速和传输的了解，具体重点研究领域如下：（a）部署一台仪器，对能量超过1 GeV的太阳耀斑相关粒子事件中质子和氦核的相对丰度具有独特的灵敏度;（B）确定预计在该项目至2014年的生命周期内发生的约10次地面增强（GLE）事件的氦丰度;以及（c）将这一信息纳入关于太阳高能粒子在较低能量的数据和这些耀斑的其他观测（光学、无线电、X射线等）。该项目将提供与空间气象研究等重要社会问题有关的数据，并提高其他仪器数据的实用性。