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Advanced Event Reconstruction and the Study of Prompt Muons in Ultrahigh Energy Extensive Air Showers in IceCube

冰立方超高能空气簇射中的高级事件重建和瞬发介子研究

基本信息

批准号：
1806826
负责人：
Xinhua Bai
金额：
$ 8.7万
依托单位：
South Dakota School of Mines and Technology
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-08-15 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1806826&HistoricalAwards=false
关键词：
Advanced Event Reconstruction Study Prompt

项目摘要

The IceCube Neutrino Observatory has discovered an extraterrestrial component of high-energy neutrinos in the energy range between 20 TeV and 10 PeV, yet their specific sources remain unidentified. To better understand the atmospheric and astrophysical nature of these neutrinos, precise modeling of atmospheric muons and neutrinos in the corresponding energy region is among the top priorities. In a related field, there have been discoveries regarding the origin and propagation of Galactic cosmic rays in past decades. One key question concerns the transition to cosmic rays of extragalactic origin at ultrahigh energies. Answering this question requires reliable measurements of both the energy and mass composition of cosmic ray primary particles between 10^15 eV (PeV) and 10^18 eV (EeV). This group will develop new analysis methods for better determining the energies and directions of these very high energy particles based on the data obtained from the IceCube Observatory. The broader impacts of this project will be both educational and synergistic. This award will provide funds for the support of a graduate student and some travel.With its surface array IceTop, IceCube provides unique data for the study of cosmic rays in the entire Galactic to extragalactic transition region and the atmospheric muons and neutrinos induced by them. The goals of this award are:--The study of prompt muons in ultrahigh energy extensive air showers (EASs) with a new analysis technique. Comparing to other approaches, this technique has the unique advantage that the prompt muon signature is insensitive to the cosmic ray primary particle mass composition;--Characterization of the time residual fluctuation of particles in the ultrahigh energy EAS front and its relation to the angular resolution in a newly improved reconstruction algorithm that solved a long-standing problem in high energy EAS direction reconstruction in IceTop;--R&D toward a unified 3-dimensional reconstruction that derives cosmic ray primary mass and energy directly from IceTop and InIce coincident data.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

冰立方中微子观测站发现了高能中微子的外星成分，能量范围在20TeV到10PeV之间，但其具体来源仍未确定。为了更好地了解这些中微子的大气和天体物理性质，对相应能区的大气微子和中微子进行精确建模是首要任务之一。在一个相关的领域，在过去的几十年里，关于银河系宇宙射线的起源和传播已经有了一些发现。一个关键问题是向河外超高能量宇宙射线的转变。要回答这个问题，需要可靠地测量10^15 eV(PeV)到10^18 eV(EEV)之间的宇宙线初级粒子的能量和质量组成。该小组将开发新的分析方法，根据从冰立方天文台获得的数据，更好地确定这些超高能粒子的能量和方向。该项目的更广泛影响将是教育性的和协同性的。该奖项将为一名研究生和一些旅行提供资金支持。通过其表面阵列IceTop，IceCube为研究整个银河系到银河系外过渡区域的宇宙射线及其引发的大气µ子和中微子提供了独特的数据。该奖项的目标是：--用一种新的分析技术研究超高能大范围空气簇射(EASS)中的瞬发µ子。与其他方法相比，这种技术具有独特的优势，即快速的Muon签名对宇宙线初级粒子质量组成不敏感；--在新改进的重建算法中表征超高能EAS锋面中粒子的时间剩余涨落及其与角分辨率的关系，该算法解决了高能EAS方向重建中的长期问题；-研发统一的三维重建，直接从IceTop和Inice重合数据获得宇宙线初级质量和能量。这一奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。