Promotion of the project for directional dark matter search with high resolution nuclear emulsion

高分辨率核乳剂定向暗物质搜索项目推进

• 批准号: 23840018
• 负责人: NAKA Tatsuhiro
• 金额: $ 2.33万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Research Activity Start-up
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-23840018/
• 关键词: 暗黒物質; 高分解能原子核乾板; 方向性検出; 原子核乾板

This research is for directional dark matter searchwith the detector which can work as large mass detector. To do that, we proposed the very high resolution nuclear emulsion, and started R&D of the technology. In this subject, representative of this research promoted the project by being central figure and advanced the practical application. In terms of development of detector itself, we succeeded the micronization to 20 nm sizes for silver halide crystals constituting the nuclear emulsion, and its technology enabled more stable production under various conditions in production processes. Also, automatic read-out system based on optical microscope was constructed, and the submicron tracks expected as dark matter signal could be read out automatically. This system demonstrated by neutron recoil signal. Simultaneously, we developedthe X-ray microscope system for final confirmation of candidate signals in SPring-8, and this system was turned into the practical use.By these R&D, we constructed the procession of system from detector production to data analysis, and we can go to the phase of test run.

这项研究是用于定向暗物质搜索的检测器，该检测器可以作为大质量检测器起作用。为此，我们提出了非常高分辨率的核乳液，并开始了该技术的研发。在这一主题中，这项研究的代表通过成为中心人物并提出了实际应用来促进该项目。在检测器本身的发展方面，我们将构成核乳液的银卤化物晶体的微型化取得了20 nm的尺寸，其技术在生产过程的各种条件下都能使更稳定的生产。同样，构建了基于光学显微镜的自动读出系统，并且可以自动读取暗物质信号，预期的亚微米轨道。该系统由中子后坐力信号证明。同时，我们开发了X射线显微镜系统，用于最终确认春季8的候选信号，并将该系统变成了实际用途。通过这些R＆D，我们构建了从检测器生产到数据分析的系统的游行，我们可以转到测试运行阶段。

项目成果

Submicron track readout in fine-grained nuclear emulsions under optical microscopy

光学显微镜下细粒核乳剂的亚微米径迹读数

• 发表时间: 2012
• 期刊: NIM A
• 作者: T. Naka;M. Kimura;M. Nakamura;O. Sato;T. Nakano;T. Asada;Y. Tawara and Y. Suzuki;K. Kimura and T. Naka
• 通讯作者: K. Kimura and T. Naka

Directional Dark Matter Search Project with Very High Resolution Nuclear Emulsion

具有甚高分辨率核乳剂的定向暗物质搜索项目

• 发表时间: 2013
• 作者: T.Naka;et al;Tatsuhiro Naka;Tatsuhiro Naka
• 通讯作者: Tatsuhiro Naka

名古屋大学大学院理学研究科素粒子宇宙物理学専攻Ｆ研究室

名古屋大学研究生院理学研究科粒子·天体物理系F实验室

Submicron track readout in fine-grained nuclear emulsions using optical microscopy

使用光学显微镜读取细粒核乳剂中的亚微米径迹

• 发表时间: 2012
• 期刊: Nucl. Instrum. Meth
• 作者: M. Kimura;T. Naka
• 通讯作者: T. Naka

Directional Dark Matter with Nuclear Emulsion

核乳剂定向暗物质

• 发表时间: 2013
• 作者: T.Naka;et al;Tatsuhiro Naka
• 通讯作者: Tatsuhiro Naka