Advanced LIGO
Advanced LIGO
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高级 LIGO
DOI：
10.1088/0264-9381/32/7/074001
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发表时间：
2015-04-09
影响因子：
3.5
通讯作者：
Zweizig, J.
中科院分区：
文献类型：
--
作者：
Aasi, J.;Abbott, B. P.;Zweizig, J.
先进的Ligo引力探测器是为华盛顿州汉福德市和美国洛杉矶利文斯顿的两个Ligo天文台设计和制造的第二代仪器。这两种仪器在设计上是相同的，并且是具有4公里长的米歇尔森干涉仪的专业版本。与最初的Ligo一样，在手臂上使用Fabry-Perot腔来增加与重力波的相互作用时间，并使用功率回收来增加有效的激光功率。已在高级LIGO中添加了信号回收，以改善频率响应。在最敏感的频率区域约100 Hz左右，设计应变灵敏度比初始LIGO好10倍。另外，灵敏度带的低频端从40 Hz向下移动到10 Hz。所有干涉仪组件都被改进的技术取代，以实现这种灵敏度增长。更好的地震隔离和测试质量悬浮液负责较低频率的增长。较高的激光功率，较大的测试质量和改进的镜像涂层可提高中和高频的灵敏度。计划在2015年中开始使用这些新工具的数据收集运行。
The Advanced LIGO gravitational wave detectors are second-generation instruments designed and built for the two LIGO observatories in Hanford, WA and Livingston, LA, USA. The two instruments are identical in design, and are specialized versions of a Michelson interferometer with 4 km long arms. As in Initial LIGO, Fabry-Perot cavities are used in the arms to increase the interaction time with a gravitational wave, and power recycling is used to increase the effective laser power. Signal recycling has been added in Advanced LIGO to improve the frequency response. In the most sensitive frequency region around 100 Hz, the design strain sensitivity is a factor of 10 better than Initial LIGO. In addition, the low frequency end of the sensitivity band is moved from 40 Hz down to 10 Hz. All interferometer components have been replaced with improved technologies to achieve this sensitivity gain. Much better seismic isolation and test mass suspensions are responsible for the gains at lower frequencies. Higher laser power, larger test masses and improved mirror coatings lead to the improved sensitivity at mid and high frequencies. Data collecting runs with these new instruments are planned to begin in mid-2015.