Cyclotron Radiation Emission Spectroscopy: First demonstration and performance benchmarks from the Project 8 experiment
Cyclotron Radiation Emission Spectroscopy: First demonstration and performance benchmarks from the Project 8 experiment
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回旋辐射发射光谱：Project 8 实验的首次演示和性能基准
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发表时间：
2017
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通讯作者：
Benjamin LaRoque
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作者：
Benjamin LaRoque
作者：LaRoque， Benjamin LaRoque顾问：Monreal， Benjamin |摘要：Project 8合作项目采用一种基于回旋辐射发射光谱的新技术，分阶段开展绝对中微子质量尺度的实验搜索。第一阶段是使用一个很好理解的窄转换电子线83mKr源来演示这种新的光谱技术，作为原理证明。本文给出了探测器首次成功运行的结果，证明了该方法的可行性。在17.8、30.4和32 keV附近观察到全宽度为一半的强转换电子线，其宽度在140 eV和15 eV之间，这取决于所采用的俘获结构的选择。在探测器运行之前，对其进行了各种升级，其具体目标是确定未来阶段规划的性能基线。这些包括可选的捕获配置，其中观察到的半最大全宽度已提高到3.6 eV。在此基础上，对事件重建和数据质量进行了评价。确定了第二阶段需要改进的地方，届时该方法将首次用于测量连续光谱中的电子。
Author(s): LaRoque, Benjamin LaRoque | Advisor(s): Monreal, Benjamin | Abstract: The Project 8 collaboration is taking a phased approach to developing an experimental search for the absolute neutrino mass scale, based on a novel technique, Cyclotron Radiation Emission Spectroscopy. The first phase was a demonstration of this new spectroscopy technique using a well understood source of narrow conversion electron lines, 83mKr, as a proof of principle. Results from the first successful operation of the detector are presented, demonstrating the viability of the approach. The strong conversion electron lines near 17.8, 30.4, and 32 keV were observed with full width at half maximum between 140 eV and 15 eV depending on the choice of trapping configuration used. Various upgrades were made to the detector prior to its being operated with the specific goal of determining a performance baseline for planning future phases. These included alternative trapping configurations, with which the observed full width at half maximum has been improved to 3.6 eV. Evaluation of the event reconstruction and data quality are presented based on this data collection period. Areas where improvements will be required for phase II, when the approach will be used for the first time to measure a electrons from a continuous spectrum, are identified.