Development of a strontium optical lattice clock for the SOC mission on the ISS
Development of a strontium optical lattice clock for the SOC mission on the ISS
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DOI：
10.1016/j.crhy.2015.03.009
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发表时间：
2015-06-01
影响因子：
1.4
通讯作者：
Kaenders, Wilhelm
中科院分区：
文献类型：
--
作者：
Bongs, Kai;Singh, Yeshpal;Kaenders, Wilhelm
太空中的超精密光学钟将使基础物理学和天文学的新研究成为可能。在欧洲航天局（ESA）的一项计划中，“空间光学时钟”（SOC）项目的目标是在本世纪末在国际空间站（ISS）上安装和运行一个光学晶格时钟。这将是ACES使命的自然后续，至少将其性能提高一个数量级。有效载荷计划包括一个光学晶格时钟，以及一个频率梳，一个微波链路和一个光学链路，用于将国际空间站时钟与位于几个国家和大陆的地面时钟进行比较。在EU-FP 7-SPACE-2010-1项目编号263500中，在2011-2015年期间开发了一种紧凑、模块化和坚固的锶晶格光学时钟演示器。目标性能是分数频率不稳定性低于1 × 10（-15）τ（-1/2），分数不准确性低于5 × 10（-17）。在这里，我们描述了该装置的发展现状，包括激光子系统。在第二级磁光阱（MOT）中实现了冷Sr-88原子的稳健制备。(C)2015年，科学院。由Elsevier Masson SAS出版。All rights reserved.
Ultra-precise optical clocks in space will allow new studies in fundamental physics and astronomy. Within an European Space Agency (ESA) program, the "Space Optical Clocks" (SOC) project aims to install and to operate an optical lattice clock on the International Space Station (ISS) towards the end of this decade. It would be a natural follow-on to the ACES mission, improving its performance by at least one order of magnitude. The payload is planned to include an optical lattice clock, as well as a frequency comb, a microwave link, and an optical link for comparisons of the ISS clock with ground clocks located in several countries and continents. Within the EU-FP7-SPACE-2010-1 project No. 263500, during the years 2011-2015 a compact, a modular and robust strontium lattice optical clock demonstrator has been developed. The goal performance is a fractional frequency instability below 1 x 10(-15) tau(-1/2) and a fractional inaccuracy below 5 x 10(-17). Here we describe the current status of the apparatus' development, including the laser subsystems. The robust preparation of cold Sr-88 atoms in a second-stage magneto-optical trap (MOT) is achieved. (C) 2015 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.