TRIUMF的ISAC-II设施中反冲mass spectrometer EMMA的初始操作
Initial operation of the recoil mass spectrometer EMMA at the ISAC-II facility of TRIUMF
摘要：
电磁质量分析仪（EMMA）是一种新型真空模式反冲质谱仪，目前正在TRIUMF的ISAC-II设施进行最后阶段的调试。EMMA采用静电偏转器和磁偏转器的对称配置来将核反应的产物与束分离，在能量和角度上聚焦它们，并根据它们的质量/电荷（m/q）比将它们分散在焦平面中。光谱仪的设计，以适应周围的目标位置的伽马射线探测器阵列TIGRESS，以提供电磁跃迁的光谱信息。EMMA用于测量聚变蒸发、辐射俘获和转移反应，以研究原子核结构和天体物理学。它的焦平面探测器的补充有利于反冲核和随后的反冲衰变光谱的识别。在这里，我们描述的设施和报告的调试工作。
英文摘要：
The Electromagnetic Mass Analyser (EMMA) is a new vacuum-mode recoil mass spectrometer currently undergoing the final stages of commissioning at the ISAC-II facility of TRIUMF. EMMA employs a symmetric configuration of electrostatic and magnetic deflectors to separate the products of nuclear reactions from the beam, focus them in both energy and angle, and disperse them in a focal plane according to their mass/charge (m/q) ratios. The spectrometer was designed to accommodate the gamma-ray detector array TIGRESS around the target position in order to provide spectroscopic information from electromagnetic transitions. EMMA is intended to be used in the measurement of fusion evaporation, radiative capture, and transfer reactions for the study of nuclear structure and astrophysics. Its complement of focal plane detectors facilitates the identification of recoiling nuclei and subsequent recoil decay spectroscopy. Here we describe the facility and report on commissioning efforts.
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