Development of Cartridge-type Superconducting Receiver and Evolution of Interstellar Matter with Atomic and Molecular Line Observations

在385- 500ghz频率范围内研制了一种限制量子噪声的超导接收机。经证实，它具有100 K的超低噪声。在这个亚毫米频率下，是边带分离接收机中噪声最低的。此外，还对射频和中频覆盖的改进进行了研究。该接收机的中频输出功率非常稳定，适合于实际操作中测量和集成来自天文物体的微弱信号。研制成功了高精度光束方向图和交叉偏振测量系统。这些成果被提交给了一家期刊。针对未来的外差阵列，还开发了一种亚毫米平衡混频器。在400-500 GHz频率范围内具有低噪声温度。研究结果已被某权威期刊接受。作为本研究的延伸，研制了双平衡混合器原型机。为了研究星际物质的评价，观测了朝向猎户座分子云的N2H+、HC3N等分子谱线。研究结果发表在一本权威期刊上。

A quantum-noise limited superconducting receiver has been developed in the 385-500 GHz frequency range. It has been demonstrated to have ultra low noise of 100 K. In this submillimeter frequency, it is the lowest noise in sideband separating receiver. In addition, some improvements on RF and IF frequency coverage have been investigated. The IF output power from this receiver is so stable that it is suitable for practical operations to measure and integrate weak signals from astronomical objects. High precision beam pattern and cross polarization measurement system has been developed successfully. The achievements were submitted to a refereed journal.A submillimeter balanced mixer has also been developed for future heterodyne array. It has low noise temperature in the 400-500 GHz frequency range. The results have been accepted by a refereed journal. As an extension of this research, a prototype of a double balanced mixer has been developed.To study evaluation of interstellar matter, molecular lines such as N2H+, HC3N toward Orion molecular cloud were observed. The results are published in a refereed journal.