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

研制了385-500 GHz频段量子噪声限制型超导接收器。在这个亚毫米频段，它具有100K的超低噪声，是边带分离接收机中噪声最低的。此外，还研究了对射频和中频频率覆盖的一些改进。该接收机的中频输出功率非常稳定，适用于实际测量和积分来自天体的微弱信号。研制成功了高精度的光束方向图和交叉极化测量系统。这些成果被提交给了一份参考期刊。一种亚毫米平衡混频器也已经被开发出来，用于未来的外差阵列。它在400-500 GHz频率范围内具有低噪声温度。这一结果已被一家被推荐的期刊接受。作为这项研究的延伸，已经开发了一个双平衡混合器的原型。为了研究星际物质的评估，观测了N2H+、HC3N等朝向猎户座分子云的分子线。这项研究结果发表在一份经过评审的期刊上。

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.