Development of the new multi-beam 100 GHz band SIS receiver FOREST for the Nobeyama 45-m Telescope-猫眼课题宝

DOI：

10.1117/12.2232137

发表时间：

2016-07

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作者：

T. Minamidani;A. Nishimura;Y. Miyamoto;H. Kaneko;H. Iwashita;C. Miyazawa;H. Nishitani;Takuya Wada;Y. Fujii;Toshikazu Takahashi;Y. Iizuka;H. Ogawa;K. Kimura;Y. Kozuki;Yutaka Hasegawa;M. Matsuo;S. Fujita;S. Ohashi;K. Morokuma-Matsui;J. Maekawa;K. Muraoka;T. Nakajima;T. Umemoto;K. Sorai;F. Nakamura;N. Kuno;M. Saito

本文报道了新的4波束、2极化、2边带、100 GHz波段SIS接收机“FOREST”（45米望远镜上的4波束接收机系统）的研制，以及在日本国家天文台分支野边山射电观测站运行的野边山45米望远镜上的调试和观测结果。FOREST旨在为世界上最大的毫米射电望远镜之一的Nobeyama 45米望远镜增加大面积测绘和80 { 116 GHz波段同时多线观测的新能力。四个梁的配置是2 x 2的正方形，相邻梁之间的间隔为50”。每个波束的波束尺寸在115 GHz时为~ 15”。接收机噪声温度与阿尔马波段3接收机一样低，因此测绘速度是45米望远镜上其他100 GHz波段接收机的4倍多。IF带宽为8 GHz（4 { 12 GHz），可实现12 CO（J = 1-0）、13 CO（J = 1-0）和C18 O（J = 1-0）的同时观测。低温恒温器内部的冷却组件按梁进行模块化。来自低温恒温器的中频信号由室温中频系统处理，然后传递到光谱仪。我们已将FOREST接收机安装到Nobeyama 45 m望远镜中，评估了其性能，并进行了大面积制图观测。这证明了森林接收器和野边山45米望远镜的出色性能。

We report the development of the new 4-beam, 2-polarization, 2-sideband, 100 GHz band SIS receiver "FOREST" (FOur beam REceiver System on the 45-m Telescope) and the results from commissioning and observations on the Nobeyama 45-m Telescope operated by Nobeyama Radio Observatory, a branch of National Astronomical Observatory of Japan. FOREST aims to add new capabilities of large-area mapping and simultaneous multi-line observation at 80 { 116 GHz band to the Nobeyama 45-m Telescope, which is one of the largest millimeter radio telescopes in the world. The configuration of the four beams is a quadrate of 2 x 2 with the separation between adjacent beams of 50". Beam size of each beam is ~ 15" at 115 GHz. Receiver noise temperature is as low as that of ALMA Band 3 receivers, so that mapping speed is more than four times as high as that of the other 100 GHz band receivers on the 45-m Telescope. The IF bandwidth is 8 GHz (4 { 12 GHz) realizing simultaneous 12CO(J = 1-0), 13CO(J = 1-0), and C18O(J = 1-0) observations. Cooled components inside of cryostat are modularized per beam. IF signals from the cryostat are processed by the room temperature IF system, and then passed to spectrometers. We have installed the FOREST receiver into the Nobeyama 45-m Telescope, evaluated its performance, and made large area mapping observations. These demonstrate the excellent performance of the FOREST receiver and the Nobeyama 45-m Telescope.

Development of the new multi-beam 100 GHz band SIS receiver FOREST for the Nobeyama 45-m Telescope

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