大型低温重力波望遠鏡KAGRAのための圧搾真空源の開発、導入及び検証

大型低温引力波望远镜KAGRA压缩真空源的研制、引进及验证

基本信息

批准号：
20F20803
负责人：
LEONARDI MATTEO
金额：
$ 1.34万
依托单位：
National Astronomical Observatory of Japan
依托单位国家：
日本
项目类别：
Grant-in-Aid for JSPS Fellows
财政年份：
2020
资助国家：
日本
起止时间：
2020-11-13 至 2023-03-31
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20F20803/
关键词：
KAGRA filter cavity freq. dep. squeezing sapphire optical absorption birefringence liquid crystals

项目摘要

From April 2022, Dr. Eisenmann participated to the characterization and improvement of the Filter Cavity (FC) optical losses and design of the frequency dependent squeezing setup to be implemented in KAGRA in future runs. He performed several simulations on to optimize the FC's mirror properties in order to fit the KAGRA's requirement and also contributed in a major way in the design of the intermediate optics that will be crucial for the injection of frequency independent squeezing in the FC and from the FC to the interferometer.He also was a key member for the characterization of sapphire substrates and in the development of novel techniques to not only perform faster and more accurate characterization of the birefringence of sapphire but also to mitigate the effect of such birefringence in the automatic alignment system of KAGRA. On the development of novel characterization system, he in the first place optimized the already existing linear polarimeter, and then autonomously developed a novel technique based on liquid crystal technology. With such setup, currently under testing at NAOJ, samples as large as KAGRA mirrros will be characterized within one day, without loosing any precision compared to the current method. It is to be noted that current setup requires more than one week to perform the characterization, and this could become a problem in the future when the size of the test masses will be increased.

从 2022 年 4 月起，Eisenmann 博士参与了滤波器腔 (FC) 光学损耗的表征和改进，以及频率相关挤压装置的设计，这些装置将在未来的运行中在 KAGRA 中实施。他进行了多次模拟来优化 FC 的反射镜特性，以满足 KAGRA 的要求，并且还在中间光学器件的设计中做出了重大贡献，这对于在 FC 中以及从 FC 中注入与频率无关的挤压至关重要他也是蓝宝石衬底表征和新技术开发的关键成员，不仅可以更快、更准确地表征蓝宝石双折射，还可以减轻 KAGRA 自动对准系统中这种双折射的影响。在新型表征系统的开发上，他首先对现有的线性旋光仪进行了优化，然后自主开发了基于液晶技术的新技术。通过这样的设置，目前正在 NAOJ 进行测试，像 KAGRA mirrros 这样大的样品将在一天内得到表征，与当前方法相比，不会失去任何精度。值得注意的是，当前的设置需要一周以上的时间来执行表征，并且当测试质量的尺寸增加时，这可能会在将来成为一个问题。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Improving the stability of frequency-dependent squeezing with bichromatic control of filter cavity length, alignment, and incident beam pointing

通过滤腔长度、对准和入射光束指向的双色控制来提高频率相关挤压的稳定性

DOI：
10.1103/physrevd.105.082003
发表时间：
2022
期刊：
影响因子：
5
作者：
Zhao Y.;Capocasa E.;Eisenmann M.;Aritomi N.;Page M.;Guo Y.;Polini E.;Arai K.;Aso Y.;van Beuzekom M.;Huang Y.;Lee R.;Lueck H.;Miyakawa O.;Prat P.;Shoda A.;Tacca M.;Takahashi R.;Vahlbruch H.;Vardaro M.;Wu C.;Leonardi M.;Barsuglia M.;Flaminio R.
通讯作者：
Flaminio R.

Improving the stability of frequency-dependent squeezing with bichromatic control of filter cavity length, alignment, and incident beam pointing

通过滤腔长度、对准和入射光束指向的双色控制来提高频率相关挤压的稳定性

DOI：
10.1103/physrevd.105.082003
发表时间：
2022
期刊：
影响因子：
5
作者：
Zhao Y.;Capocasa E.;Eisenmann M.;Aritomi N.;Page M.;Guo Y.;Polini E.;Arai K.;Aso Y.;van Beuzekom M.;Huang Y.;Lee R.;Lueck H.;Miyakawa O.;Prat P.;Shoda A.;Tacca M.;Takahashi R.;Vahlbruch H.;Vardaro M.;Wu C.;Leonardi M.;Barsuglia M.;Flaminio R.
通讯作者：
Flaminio R.

Characterization of KAGRA new ITM substrates

KAGRA 新型 ITM 基材的表征