基于四波混频效应的光量化器

 一种基于四波混频效应的高速光量化器,包括：一第一光泵浦源、一第二光泵浦源和一采样光源；一高速微波电信号源的输出端与采样光源的输入端连接；一第一、第二和第三光放大器,其输入端分别与第一、第二光泵浦源和采样光源的输出端连接；一强度调制器的输入端与第三光放大器的输出端连接；一待测微波信号源的输出端与强度调制器的输入端连接；一第一偏振控制器、一第二偏振控制器和一第三偏振控制器,其输入端分别与第一光放大器、第二光放大器和强度调制器的输出端连接；一第一波导阵列光栅的输入端分别与第一、第二和第三偏振控制器的输出端连接；一非线性介质的输入端与第一波导阵列光栅的输出端连接；一第二波导阵列光栅的输入端与非线性介质的输出端连接；一并行高速光探测阵列的输入端与第二波导阵列光栅的输出端连接

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies