Measurement of Oscillations in Solar Boron-8 Neutrinos and Studies of Optical Scattering in the SNO+ Detector

太阳硼 8 中微子振荡的测量和 SNO 探测器中光学散射的研究

• 批准号: 2269412
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2269412
• 关键词: Measurement; Oscillations; Solar; Boron; Neutrinos

Daniel Cookman will be a graduate student in the SNO+ group at Oxford. His work will be fully integral to the SNO+ collaborations goals of measuring neutrinos from a variety of sources and ultimately of searching for neutrino-less double beta decay. His work will be split into two major areas. The first area is the calibration of the scattering properties of the SNO+ detector in the scintillator phase. The Oxford group is responsible for this calibration system and Daniel will be the main person taking these measurements from the water phase into the scintillator phase of the project. He will pick up the analysis work from the Esther Turner who has led this analysis during the water phase and Daniel will extend it to the new conditions in which absorption and re-emission pose a severe background to Rayleigh and other optical scattering phenomena. This will require more use of the wavelength tenability of our lasers and the absorption spectrum of the scintillator, which will be measured by other calibration systems. The entire optical calibration of the SNO+ detector will have to be approached in a more coherent way because scattering, absorption and detection efficiency measurements will be more coupled than they were in the water phase. Daniel will further automate the analysis process and extend the analysis methods to a measurement of the scattering angle as well as novel methods for signal selection. He will also take over the expertise on the scattering calibration hardware system from Jeffrey Lidgard who is the current expert on this topic because Daniel will become responsible together with our new postdoc for the regular operation of the scattering calibration process.As the detector will be going through the scintillator filling and tellurium loading stages during Daniel DPhil period, he will use the calibration measurements to evaluate the optical quality of the scintillator mix in-situ and search potential contaminations. The second field of work will be a physics analysis. We have not yet picked a definite topic for this but his primary interest lies in measurement of neutrinos from Supernovae. The group already has a strong activity in this with Prof Jeff Tseng and his current graduate student Mr Josh Wang Daniel also shows some interest in the area of geo-anti-neutrinos, which would fit well with the current activities of two students on reactor anti-neutrinos. As of today it is too early to predict how exactly his analysis work will develop but it is clear that the SNO+ collaboration overall only has a small group working on supernova neutrinos and a very small group working on geo-neutrinos and there are many opportunities for Daniel to make a significant contribution.

丹尼尔·库克曼（Daniel Cookman）将是牛津SNO+集团的研究生。他的工作将是SNO+合作目标的完全组成部分，即测量来自各种来源的中微子以及最终寻找无中微子双重β衰变的目标。他的工作将分为两个主要领域。第一个区域是在闪烁剂相中SNO+检测器的散射特性的校准。牛津集团负责这种校准系统，但丹尼尔将是将这些测量的主要人物从水相进入项目的闪光灯阶段。他将从以斯帖·特纳（Esther Turner）那里获得分析工作，以斯帖·特纳（Esther Turner）在水期领导了这一分析，但丹尼尔（Daniel）将其扩展到新的条件，在新条件下，吸收和重新排放对雷利（Rayleigh）和其他光学散射现象构成了严重的背景。这将需要更多地利用激光器的波长态度和闪烁体的吸收光谱，这将通过其他校准系统来测量。 SNO+检测器的整个光学校准将必须以更连贯的方式接近，因为散射，吸收和检测效率测量将比在水相中更耦合。丹尼尔（Daniel）将进一步自动化分析过程，并将分析方法扩展到测量散射角以及信号选择的新方法。他还将接管杰弗里·利德加德（Jeffrey Lidgard）的散射校准硬件系统的专业知识，杰弗里·利德加德（Jeffrey Lidgard）是目前的主题专家，因为丹尼尔（Daniel）将与我们的新散射校准过程一起进行新的散射校准过程，因为探测器将通过闪烁剂填充和校准量的效果，以便在Daniel Dphil期间进行效果量，他将在Daniel Dphil量中进行评估，以至于他将效果量的效果量，并将其效果使用。原位和搜索潜在污染。第二个工作领域将是物理分析。我们尚未为此选择一个明确的话题，但他的主要兴趣在于测量超新星的中微子。该小组在杰夫·滕（Jeff Tseng）教授和他目前的研究生乔什·王·丹尼尔（Josh Wang Daniel）先生对此方面的活动已经有很强的活动，这对Geo-anti-neutrinos领域也表现出一定的兴趣，这将非常适合两名在反应堆抗神经替氏抗反应器的学生的活动。截至今天，还为时过早地预测他的分析工作将如何发展，但是很明显，SNO+合作总体只有一个小组在超级新星中微子上工作，并且是一个从事地理间隔的非常小的小组，但丹尼尔有很多机会可以做出重大贡献。