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    面向世界科技前沿,面向国家重大需求,面向国民经济主战场,率先实现科学技术跨越发展,率先建成国家创新人才高地,率先建成国家高水平科技智库,率先建设国际一流科研机构。

    ——中国科学院办院方针

    首页 > 传媒扫描

    【中国科学报】“太极一号”第一阶段在轨测试任务完成

    中国迈出空间引力波探测第一步

    2019-09-20 中国科学报 丁佳
    【字体:

    语音播报

    “太极一号”卫星 中科院供图

      2019年8月31日上午7时41分,中国科学院空间科学(二期)战略性先导科技专项首发星——微重力技术实验卫星在酒泉卫星发射中心成功发射。9月20日,中科院宣布,卫星在轨测试正在按计划有序开展,卫星状态正常,各项测试结果正常,第一阶段在轨测试任务顺利完成。作为我国首颗空间引力波探测技术实验卫星,该卫星被正式命名为“太极一号”。

      “太极一号”的成功发射和第一阶段在轨测试任务的顺利完成,迈出了我国空间引力波探测的第一步,为我国在空间引力波探测领域率先取得突破奠定了基础。

      “太极一号”第一阶段在轨测试和数据分析结果表明,激光干涉仪位移测量精度达到百皮米量级(约为一个原子直径),引力参考传感器测量精度达到地球重力加速度的百亿分之一量级,微推进器推力分辨率达到亚微牛量级?!疤缓拧笔迪至宋夜裎棺罡呔鹊目占浼す飧缮娌饬?,成功进行了我国首次在轨无拖曳控制技术试验,并在国际上首次实现了微牛级射频离子和双?;舳缤平际醯脑诠煅橹?。

      中科院从2008年开始前瞻论证我国空间引力波探测的可行性,经过多年科学前沿研究,提出了我国空间引力波探测“太极计划”,确定了“单星、双星、三星”“三步走”的发展战略和路线图,并于2018年8月在空间科学(二期)战略性先导科技专项中立项实施 “太极计划”单星工程任务,启动了三步走中的第一步?!疤缓拧笨蒲型哦右允迪至愕揭坏耐黄莆喝?,全力以赴、攻坚克难、勇于突破、协同创新,在不到一年的时间里完成了卫星的研制任务。

      引力波是物质和能量的剧烈运动和变化所产生的一种物质波。爱因斯坦一个世纪前基于广义相对论预言了引力波的存在。双黑洞并合产生的引力波已在2015年首次在地面被直接观测到。引力波提供了有别于电磁波的一个全新的观测宇宙的重要窗口,成为人类探索和认识宇宙的新的途径和手段。

      不同频率引力波反映了宇宙的不同时期和不同的天体物理过程。有别于地基探测,在空间能够探测到中低频段的引力波信号,能够发现天体质量更大、距离更遥远的引力波波源,揭示更为丰富的天体物理过程。由于引力波信号极其微弱,实施空间引力波探测挑战巨大,需要突破目前人类精密测量和控制技术的极限。所涉及的核心技术包括高精度超稳激光干涉仪、引力参考传感器、超高精度无拖曳控制、微牛级推进器、超稳超静卫星平台等?!疤缓拧闭敲樽颊庖恢卮罂萍记把?,对这些核心技术的可行性和实现途径进行在轨验证。

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