LAGRANGE: LAser GRavitational-wave ANtenna at GEo-lunar Lagrange points-猫眼课题宝

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发表时间：

2011-11

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arXiv: Instrumentation and Methods for Astrophysics

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其他

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作者：

John Conklin;A. Zoellner;A. Palmer;B. Lantz;S. Buchman;D. DeBra;B. Jaroux;H. Altwaijry;A. Genova;S. Williams;T. Al-Saud;B. Costello;M. Al-Majed;E. Hultgren;K. L. Shu;D. Tenerelli;K. Hooper;K. Bower;S. Saraf;H. Sanchez;E. Smith;B. Plante;J. Zhou;A. Alfauwaz;V. Aguero;A. Aljadaan;R. Vanbezooijen;S. P. Worden;R. Byer;G. Cutler;D. Faied;K. Balakrishnan;D. Schaechter;G. Vasudevan;A. Klavins;T. Sherrill;J. Lipa;C. Foster;J. Hanson

我们描述了一个新的空间引力波天文台的设计称为拉格朗日，保持所有重要的丽莎科学在大约一半的成本和降低技术风险。它由三个无阻力航天器组成，处于最稳定的地心编队，即地月L3、L4和L5拉格朗日点。固定天线允许与地球持续联系，解决了通信带宽和延迟问题。一个直径为70毫米的金铂球，与其外壳之间有35毫米的间隙，作为每个航天器的单一惯性参考，以“真正的”无阻力模式（没有测试质量强迫）运行。这是模块化重力参考传感器的核心，其其他优点是：基于DISCOS 1972无阻力使命的简单笼式设计，具有pm精细和nm粗传感器的全光学读出，以及来自Honeywell陀螺仪和DISCOS和Gravity Probe B无阻力传感器的广泛技术遗产。干涉测量系统设计有反射光学器件和高度稳定的频率标准，可在测试质量之间进行测距，并且每个航天器需要一个带有一个激光器的光具座。每个航天器有两个20厘米直径的望远镜，每个望远镜都有现场指向，采用了洛克希德·马丁公司为先进光学系统开发的新技术，洛克希德·马丁公司还根据多次飞行验证的总线结构设计了航天器。其他技术进步包括无阻力推进，热控制，充电管理系统和材料。拉格朗日子系统被设计成可扩展和模块化的，使它们与丽莎或其他引力科学任务的子系统互换。我们计划在2013年第一次发射（UV-LED Sat）时，对小型和纳米卫星飞行的关键技术进行空间鉴定。

We describe a new space gravitational wave observatory design called LAGRANGE that maintains all important LISA science at about half the cost and with reduced technical risk. It consists of three drag-free spacecraft in the most stable geocentric formation, the Earth-Moon L3, L4, and L5 Lagrange points. Fixed antennas allow continuous contact with the Earth, solving the problem of communications bandwidth and latency. A 70 mm diameter AuPt sphere with a 35 mm gap to its enclosure serves as a single inertial reference per spacecraft, operating in "true" drag-free mode (no test mass forcing). This is the core of the Modular Gravitational Reference Sensor whose other advantages are: a simple caging design based on the DISCOS 1972 drag-free mission, an all optical read-out with pm fine and nm coarse sensors, and the extensive technology heritage from the Honeywell gyroscopes, and the DISCOS and Gravity Probe B drag-free sensors. An Interferometric Measurement System, designed with reflective optics and a highly stabilized frequency standard, performs the ranging between test masses and requires a single optical bench with one laser per spacecraft. Two 20 cm diameter telescopes per spacecraft, each with in- field pointing, incorporate novel technology developed for advanced optical systems by Lockheed Martin, who also designed the spacecraft based on a multi-flight proven bus structure. Additional technological advancements include the drag-free propulsion, thermal control, charge management systems, and materials. LAGRANGE sub- systems are designed to be scalable and modular, making them interchangeable with those of LISA or other gravitational science missions. We plan to space qualify critical technologies on small and nano satellite flights, with the first launch (UV-LED Sat) in 2013.

LAGRANGE: LAser GRavitational-wave ANtenna at GEo-lunar Lagrange points

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