Electron electric dipole moment search by using polarized ultracold molecule s

利用极化超冷分子进行电子电偶极矩搜索

• 批准号: 21H01113
• 负责人: DOYLE JOHN
• 金额: $ 10.98万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21H01113/
• 关键词: electric dipole moment; buffer gas cooling; thorium oxide

As for the photodetector development, we have procured various items for mass production. For example, we procured photosensors (Silicon photomultiplier: SiPM) which are the most important part of the detector. We got relatively low-dark count individual sensors. Since suppressing the dark count is one of the crucial points in the development, we plan to cool the SiPMs below the dew point, the low-dark count individuals mitigate the cooling requirements of the detectors.In order to mitigate stray light from the readout laser scattering, we procured 2 pieces of custom-made interference bandpass filters, which have a great extinction ratio between ~510nm (signal wavelength) and longer than 700 nm (background wavelength) for a prototype test. Based on the test, we confirmed that the stray light suppression ratio is high enough while keeping over 90% transmission for the signal wavelength.We also prepared various peripheral hardware such as parts of preamplifier boards and assemblies, and vacuum feedthrough assemblies.Mass production has already been launched in this period and will be finished probably at the beginning of the next fiscal year. We are also constructing operating software and hardware in parallel.

至于光电探测器的发展，我们为大规模生产采购了各种项目。例如，我们采购了光电传感器（硅光电倍数：SIPM），这是检测器中最重要的部分。我们得到了相对较低的计数个体传感器。由于抑制了黑暗计数是开发中关键点之一，因此我们计划冷却露点以下的尖口，低黑暗计数的个体减轻了检测器的冷却要求。散射，我们采购了2片定制的干扰带通滤波器，这些过滤器的灭绝比在〜510nm（信号波长）之间，用于原型测试，其灭绝比在〜510nm（信号波长）和超过700 nm（背景波长）之间。根据测试，我们证实了杂散的抑制比足够高，同时保持超过90％的传输量。我们还准备了各种外围硬件，例如前置放大器板和组件的一部分，以及真空馈电组装。已经在此期间推出，可能会在下一个财政年度开始完成。我们还并行构建操作软件和硬件。

项目成果

ACME実験のためのSiPMモジュールの開発

开发用于 ACME 实验的 SiPM 模块

• 发表时间: 2021
• 作者: Masuda Takahiko;Ang Daniel G.;Hutzler Nicholas R.;Meisenhelder Cole;Sasao Noboru;Uetake Satoshi;Wu Xing;DeMille David;Gabrielse Gerald;Doyle John M.;Yoshimura Koji;稲垣秦一郎 他;比村治彦;比村治彦;Takahiko Masuda;H. Himura;Takahiko Masuda;Takahiko MASUDA;H. Himura;増田孝彦;比村治彦;平本綾美
• 通讯作者: 平本綾美

Silicon photomultiplier module as a photon detector for ACME III Electron EDM search

硅光电倍增管模块作为 ACME III Electron EDM 搜索的光子探测器

• 发表时间: 2021
• 作者: Masuda Takahiko;Ang Daniel G.;Hutzler Nicholas R.;Meisenhelder Cole;Sasao Noboru;Uetake Satoshi;Wu Xing;DeMille David;Gabrielse Gerald;Doyle John M.;Yoshimura Koji;稲垣秦一郎 他;比村治彦;比村治彦;Takahiko Masuda;H. Himura;Takahiko Masuda;Takahiko MASUDA
• 通讯作者: Takahiko MASUDA

電子EDM

电子放电加工机

• 发表时间: 2021
• 作者: Masuda Takahiko;Ang Daniel G.;Hutzler Nicholas R.;Meisenhelder Cole;Sasao Noboru;Uetake Satoshi;Wu Xing;DeMille David;Gabrielse Gerald;Doyle John M.;Yoshimura Koji;稲垣秦一郎 他;比村治彦;比村治彦;Takahiko Masuda;H. Himura;Takahiko Masuda;Takahiko MASUDA;H. Himura;増田孝彦;比村治彦;平本綾美;比村治彦;増田孝彦
• 通讯作者: 増田孝彦

Harvard University/Northwestern University/The university of Chicago(米国)

哈佛大学/西北大学/芝加哥大学（美国）

ACME実験におけるSiPMモジュールの開発および量産状況

ACME实验中SiPM模块的开发及量产现状

• 发表时间: 2021
• 作者: Masuda Takahiko;Ang Daniel G.;Hutzler Nicholas R.;Meisenhelder Cole;Sasao Noboru;Uetake Satoshi;Wu Xing;DeMille David;Gabrielse Gerald;Doyle John M.;Yoshimura Koji;稲垣秦一郎 他;比村治彦;比村治彦;Takahiko Masuda;H. Himura;Takahiko Masuda;Takahiko MASUDA;H. Himura;増田孝彦;比村治彦;平本綾美;比村治彦;増田孝彦;平本綾美
• 通讯作者: 平本綾美