ISIS脉冲中子和μ子源上的新型高场光激发μ子谱仪
The new high field photoexcitation muon spectrometer at the ISIS pulsed neutron and muon source
摘要：
在位于英国卢瑟福阿普尔顿实验室的高磁场μ介子谱仪（HiFi）上安装了一个高功率脉冲激光系统。这一升级使人们能够在高磁场下进行光泵μ子探测实验，这开辟了μ子自旋光谱学的新应用。在这份报告中，我们给出了HiFi激光系统的原理的概述，并描述了新开发的技术和设备，使精确控制的μ子仪器中的样品的光激发。演示实验说明了这种独特的组合的光激发系统和避免电平交叉技术的潜力。
英文摘要：
A high power pulsed laser system has been installed on the high magnetic field muon spectrometer (HiFi) at the ISIS pulsed neutron and muon source, situated at the STFC Rutherford Appleton Laboratory in the UK. The upgrade enables one to perform light-pump muon-probe experiments under a high magnetic field, which opens new applications of muon spin spectroscopy. In this report we give an overview of the principle of the HiFi Laser system, and describe the newly developed techniques and devices that enable precisely controlled photoexcitation of samples in the muon instrument. A demonstration experiment illustrates the potential of this unique combination of the photoexcited system and avoided level crossing technique.
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