NRO 10-m submillimeter telescope
NRO 10-m submillimeter telescope
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NRO 10米亚毫米望远镜
DOI：
10.1117/12.390409
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
S. Matsumoto
中科院分区：
文献类型：
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作者：
N. Ukita;R. Kawabe;M. Ishiguro;H. Ezawa;Y. Sekimoto;T. Hasegawa;S. Yamamoto;K. Miyawaki;S. Matsumoto
在野边山射电天文台建造了一台10米亚毫米望远镜，用于3至0.3毫米波段的干涉观测。该望远镜是一个大型毫米和亚毫米阵列的工程模型，将用于在远程站点开发亚毫米观测技术。我们制造的轻质加工铝板（15 kg m-2）表面精度为5微米rms。它们的典型尺寸为0.8 m X 0.6 m，由三个电动螺钉支撑。备份结构是由一个低热膨胀合金的中心枢纽，和CFRP蜂窝板和管。全息测量将使用附近的3 mm发射器进行。总体表面精度预计< 25微米rms;目标是17微米rms。我们已经实现了0.03' rms的角度编码器精度。驱动和控制系统设计为在无风和夜间实现1 '.0 rms的指向误差。在风速为7 m·s ~（-1）时，指向误差增大到2 '.0rms。将使用安装在中心毂上的直径10厘米的光学望远镜来表征指向和跟踪精度。将使用温度测量和有限元分析来研究指向和表面精度的热效应。还需要快速位置切换能力来消除大气波动。天线能够以3 deg s-2的最大速度和6 deg的最大加速度驱动两个轴。s-2该望远镜目前配备有100、150、230和345 GHz的SIS接收器和一个连续后端以及一个瞬时带宽为512 MHz和1024通道输出的FX型数字自相关器。
A 10-m submillimeter telescope designed for interferometric observations at bands from 3 to 0.3 mm has constructed at Nobeyama Radio Observatory. The telescope is an engineering model for a large millimeter and sub-millimeter array, and will be operated for developments of sub-millimeter observation techniques at a remote site. We have fabricated lightweight machined aluminum panels (15 kg m-2) that have a surface accuracy of 5 micrometer rms. They have a typical size of 0.8 m X 0.6 m, and are supported with three motorized screws. The back-up structure is constructed of a central hub of low thermal expansion alloy, and CFRP honeycomb boards and tubes. Holography measurements will be made with a nearby transmitter at 3 mm. The overall surface accuracy is expected to be < 25 micrometer rms; the goal being 17 micrometer rms. We have achieved an accuracy of 0.03' rms for angle encoders. The drive and control system is designed to achieve a pointing error of 1'.0 rms with no wind and at night. Under a wind velocity of 7 m s-1, the pointing error increases to 2'.0 rms. An optical telescope of 10-cm diameter mounted on the center hub will be used to characterize pointing and tracking accuracy. Thermal effects on the pointing and surface accuracy will be investigated using temperature measurements and FEM analyses. The fast position switching capability is also demanded to cancel atmospheric fluctuations. The antenna is able to drive both axes at a maximum velocity of 3 deg s-2 with a maximum acceleration of 6 deg. s-2. The telescope is currently equipped with SIS receivers for 100, 150, 230, and 345 GHz and a continuum backend and an FX-type digital autocorrelator with an instantaneous bandwidth of 512 MHz and 1024 channel outputs.