论文标题
IBS/CAPP的轴支卤素实验的噪声温度测量
Noise temperature measurements for axion haloscope experiments at IBS/CAPP
论文作者
论文摘要
首先是由于Peccei-Quinn机制在粒子物理的强相互作用中解决CP问题的结果首次引入了该轴，并且是一个动机的寒冷暗物质候选者。预计该粒子与物质相互作用极为弱，预计其质量将位于$ $ $ eV范围内，相应的频率约为GHz范围。 1983年，P。Sikivie提出了一种检测方案，即所谓的Axion Haloscope，其中轴在强磁场渗透到可调的微波腔中的光子转换为光子。实验噪声的主要来源归因于RF放大器增加噪声，因此对放大器噪声的精确理解非常重要。我们介绍了广泛用于轴突暗物质搜索的各种低噪声放大器的噪声温度的测量。
The axion was first introduced as a consequence of the Peccei-Quinn mechanism to solve the CP problem in strong interactions of particle physics and is a well motivated cold dark matter candidate. This particle is expected to interact extremely weakly with matter and its mass is expected to lie in $μ$eV range with the corresponding frequency roughly in GHz range. In 1983 P. Sikivie proposed a detection scheme, so called axion haloscope, where axions resonantly convert to photons in a tunable microwave cavity permeated by a strong magnetic field. A major source of the experimental noise is attributed to added noise by RF amplifiers, and thus precise understandings of amplifiers' noise is of importance. We present the measurements of noise temperatures of various low noise amplifiers broadly used for axion dark matter searches.
