Southern big little bee with heavenly palace two roaming the space to undertake mysterious task-mmc.exe

The "bee" with the Tiangong two space has a mysterious mission of GrB – OBOX polarization detector design principle diagram of GrB positive diagram 22 September 15th 04, carrying the Tiangong two space laboratory Long March two F T2 launch rocket launch at the Jiuquan satellite launch center. About 575 seconds later, Tiangong two was successfully separated from the rocket and entered the scheduled orbit. The launch was successful. Tiangong two is China’s first truly space lab, the experimental class and resource class two class configuration, a total length of 10.4 meters, a maximum diameter of 3.35 meters, the sun has a wingspan of about 18.4 meters, weighing 8.6 tons, is designed to last for two years, based on Tiangong-1 products on the target aircraft backup, in order to meet the propellant additional experiments need to promote the system of adaptation; in order to meet the need for medium-term stay, manned livable environment made significant improvement, ability to support two astronauts in orbit, 30 days. Tiangong two loaded space atomic clock 14 applied load, and weightlessness cardiovascular function research and other related aerospace medical laboratory equipment, equipped with on-board maintenance technology verification device, manipulator terminal maintenance test equipment, will be carried out in space science and technology test (real) test. According to the plan, Tiangong two laboratory space launch, the development platform and the space application load testing, and the Shenzhou eleven spacecraft before launch, do a good job with the Shenzhou eleven spacecraft rendezvous and docking preparation. It is understood that the following Tiangong two flying scientists, astronomy and space science, Nanjing University, Nanjing Purple Mountain Observatory participated in the development of the international first dedicated high sensitivity gamma ray bursts polarization measuring instrument — "celestial" telescope, launched into space exploration and scientific experiment, completed one of the 14 mysterious mission No. two shoulder the temple. The detection area of only more than 400 square centimeters, equivalent to the general pot so big, divided into "two eyes" and "body", the eye part adopts 1600 plastic scintillator as the detector, to detect the polarization of cosmic gamma ray gamma ray bursts in itself. This is the same as the honeybee’s compound eye, which is the principle of the outside world, so it is called the "little bee" detector by scientists. Chinese Academy of Sciences researcher at the Institute of high energy physics, Zhang Shuangnan said in an interview, GRBs are referred to as gamma ray bursts, in the evolution of stars at the end of the interior will be a drastic outbreak, and the outbreak of the process may be accompanied by a strong burst of gamma rays. Although the gamma ray this intense radiation lasted for a long time, but a few thousand seconds, short less than one percent seconds, but its brightness is more than the sum of all other objects in the universe, the total energy of radiation energy radiation is also much more life than the sun, like a star at the end of the "flower of life", will be a brilliant life in an instant bloom. In addition, when the two neutron stars and black holes or finally together, will produce strong gamma ray burst, the burst of energy is usually better than we generally know the supernova explosion and its total energy to tens of thousands of times, is also known as.

南大“小蜜蜂”随天宫二号遨游太空 肩负神秘任务 伽玛暴偏振探测器—OBOX设计原理图 伽玛暴正面示意图   9月15日22时04分,搭载着天宫二号空间实验室的长征二号F T2运载火箭在酒泉卫星发射中心点火发射。约575秒后,天宫二号与火箭成功分离,进入预定轨道,发射取得圆满成功。   天宫二号是我国第一个真正意义上的太空实验室,采用实验舱和资源舱两舱构型,全长10.4米,最大直径3.35米,太阳翼展宽约18.4米,重8.6吨,设计在轨寿命两年,在天宫一号目标飞行器备份产品的基础上,为满足推进剂补加验证试验需要,对推进分系统进行了适应性改造;为满足中期驻留需要,对载人宜居环境进行了重大改善,具备支持两名航天员在轨工作、生活30天的能力。   天宫二号装载了空间冷原子钟等14项应用载荷,以及失重心血管功能研究等相关航天医学实验设备,配备在轨维修技术验证装置、机械臂操作终端等在轨维修试验设备,将开展空间科学及技术试(实)验。   按计划,天宫二号空间实验室发射升空后,将开展平台和空间应用载荷测试,并于神舟十一号飞船发射前,做好与神舟十一号飞船交会对接的准备。   据了解,这次跟随天宫二号飞天的有南京大学天文与空间科学学院以及南京紫金山天文台的科学家们参与研发的国际首个专用的高灵敏度伽马射线暴偏振测量仪器——“天极”望远镜,进入太空展开科学探索实验,完成天宫二号肩负的14项神秘任务之一。   它的探测面积只有四百多平方厘米,相当于一般的花盆那么大,分成“眼睛”和“身体”两部分,眼睛部分采用1600根塑料闪烁体作为探测器,来探测宇宙伽玛射线暴里的伽玛射线本身的偏振性质。这就跟蜜蜂的复眼看外面世界的原理一样,所以又被科学家们称为“小蜜蜂”探测器。   中科院高能物理研究所研究员张双南在接受媒体采访时说,伽玛暴是伽马射线暴的简称,恒星在演化到最后的时候内部将发生剧烈的爆发,而这种爆发的过程中可能伴随着强烈的伽马射线的爆发。虽然这种强烈的伽马射线辐射持续时间长则不过几千秒,短则不足百分之一秒,然而其亮度却超过全宇宙其它天体的总和,辐射能量比太阳一生辐射的总能量还多得多,犹如恒星最后的“生命之花”,将一生的辉煌在一瞬间绽放。另外,当两个黑洞或者中子星最后并合在一起的时候,也会产生强烈的伽马射线的爆发,这种爆发的能量通常比我们一般所知道的超新星爆发它的总能量要高成千上万倍,也被称为是宇宙大爆炸之后最剧烈的天体的爆发现象。   南大校友、中科院高能物理研究所粒子天体物理中心研究员宋黎明在接受《现代快报》采访时说,“小蜜蜂”探测器体重大约28公斤,它从最外面看起来是黑色的,其实最里面是透明塑料,透明塑料的外面包裹着一层反射膜,再外面有隔热的覆盖层。探测器的眼睛部分安装在天宫二号舱外,是从舱壁上伸出去的一部分。身体部分在天宫二号舱里面,就相当于是一只小蜜蜂,从舱里向外伸出一个头,看外面的宇宙世界。   宋黎明说,“小蜜蜂”探测器跟随天宫二号飞天时,是处于断电状态的。预计9月16日,科研人员将首先给“小蜜蜂”探测器的身体加电,到9月22日再给“小蜜蜂”的眼睛加电。一切顺利的话,9月23日,地面科研人员就将收到探测信号。   张双南表示,作为国际上最灵敏的伽玛射线暴偏振探测仪器,“天极”能够获得高精度伽玛射线偏振测量的最大样本,它的主要科学目标是观测伽玛射线暴并且测量伽玛射线暴的偏振性质,预期运行两年“天极”可以探测到大约100个伽玛射线暴。   南京大学在伽玛射线暴研究中取得一系列重大成就。比如,已故的中科院院士、南京大学陆埮教授在伽玛射线暴余辉刚发现不久就提出了星风环境和致密介质环境,有力地支持了伽玛暴起源于大质量恒星塌缩的观点;提出了伽玛暴余辉动力学演化的统一模型。2013年,南京大学天文与空间科学学院戴子高教授课题组对于伽玛射线暴的X射线耀发统计研究取得新进展:在伽玛射线暴的余辉中发现自组织临界现象,其工作成果以快讯的形式于2013年7月在线发表于《自然-物理》(Nature Physics)等等。相关的主题文章:

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