论文标题
斑点上的正电子束结构及其用于多普勒拓宽钛薄膜的测量
The SPOT-IL Positron Beam Construction and Its Use for Doppler Broadening Measurement of Titanium Thin Films
论文作者
论文摘要
据报道，在希伯来大学建造的慢阳台梁的建设和首次操作在这里报道。该光束遵循传统设计，使用22NA源，钨主持人和配备负载锁系统的目标单元，可轻松插入样品。梁的能量在0.03 KEV和30 KEV之间变化。检测系统由两个高纯净的锗检测器组成，彼此面对，允许低背景多普勒海湾（DB）测量。事件读数是使用最先进的紧凑型桌面系统完成的。该目标细胞旨在允许对DB和样品电导率进行联合测量，并在将来添加更多检测选项的灵活性。通过使用它来对钛（Ti）膜进行负责测试。在各种能量（2 KEV -25 KEV）下测量了两种1.2μMTI膜，并在退火后产生，结果显示出与先前测量值的一致行为。
The construction and first operation of the slow positron beam built at the Hebrew University is reported here. The beam follows a traditional design, using a 22Na source, a Tungsten moderator, and a target cell equipped with a load-lock system for easy sample insertion. The beam energy varies between 0.03 keV and 30 keV. The detection system consists of two high purity Germanium detectors, facing each other, allowing low-background Doppler-Broadening (DB) measurements. Event readout is done using a state-of-the-art compact desktop system. The target cell is designed to allow a combined measurement of DB and sample conductivity, with the flexibility to add more detection options in the future. The beam has been successfully tested by using it to charecterize Titanium (Ti) films. Two 1.2 μm Ti films -- as produced, and after annealing, were measured at various energies (2 keV - 25 keV), and the results show consistent behavior with previous measurements.
