ALMA band 2+3 (67–116 GHz) optics: Design and first measurements
ALMA band 2+3 (67–116 GHz) optics: Design and first measurements
复制标题
ALMA 频段 2+3 (67–116 GHz) 光学器件：设计和首次测量
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Pavel A. Yagoubov
中科院分区：
文献类型：
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作者：
Antonio G. González;V. Tapia;N. Reyes;F. Mena;R. Nesti;F. Villa;F. Cuttaia;A. D. Rosa;A. Giorgio;A. Morbidini;Pavel A. Yagoubov
ALMA 望远镜是世界上最大的地面天文项目之一。自 2011 年开始运营以来，它已经取得了巨大的科学成果。在所有最初规划的频段中，频段 2 (67-90 GHz) 是最后一个在阵列中实施的频段。最近的技术进步使得将频段 2 和频段 3 (84-116 GHz) 组合到单个宽带接收器中成为可能。本文介绍了使用异形波纹喇叭和改进的菲涅尔透镜设计覆盖 67 至 116 GHz 两个频段的宽带光学器件的初步成果。首次测量于 12 月 15 日至 2016 年 1 月在 ESO 进行，结果与模拟结果吻合良好。
The ALMA telescope is one of the largest on-ground astronomical projects in the world. It has been producing great scientific results since the beginning of operations in 2011. Of all the originally planned bands, band 2 (67-90 GHz) is the last band to be implemented into the array. Recent technological progress has open the possibility to combine bands 2 and 3 (84-116 GHz) into a single wideband receiver. This paper describes the first efforts to design wideband optics which cover both bands, from 67 to 116 GHz, using a profiled corrugated horn and a modified Fresnel lens. First measurements were performed at ESO in Dec15-Jan16 and showed good agreement with simulations.