权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Development of a RICH detector for collider experiments using multi-layer aerogel radiator

使用多层气凝胶散热器开发用于对撞机实验的 RICH 探测器

基本信息

批准号：
17340072
负责人：
IIJIMA Toru
金额：
$ 9.79万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17340072/
关键词：
Radiation detectors Silica aerogel Cherenkov counter Semiconductor detectors Particle physics

项目摘要

We have developed a Ring-Imaging Cherenkov (RICH) detector using a new novel idea of multi-layer aerogel radiator. A RICH with multi-layer aerogel radiator utilizes the radiator consisting of two or more aerogel layers of different refractive indices, which allows for an increase in Cherenkov photon yield on account of the increase in overall radiator thickness, while avoiding the simultaneous degradation in single photon angular resolution associated with the increased uncertainty of the emission point. The major achievements in this research program are the followings;1. Proof-of-principle by a beam testWe carried out a beam test at KEK using the radiator consisting of 2 to 4 aerogel layers. We successfully demonstrated that we can increase the Cherenkov photon yields by a factor of 1.5 (from 6 p.e. to 9 p.e.) without deteriorating the single photon angular resolution (about 13mrad). We also carried out a study on the optimization for the combination of refractive index and thickness … More of the aerogel layers.2. Improvement of optical quality of aerogel radiatorWe carried out a study on the method to develop monolithic aerogel radiator having two or three internal layers with varying refractive indices. We found that it is possible to produce such radiator having optical quality similar to a single layer aerogel radiator.3. Study on photodetectionWe designed a new photo-sensor consisting of so-called Geiger mode APDs and light-guides. We carried out measurements of some fundamental properties of the "Geiger-mode APD", such as the quantum efficiency, the time resolution and the noise performance. We then evaluated performance of a aerogel-RICH with such a photo-sensor using a detailed Monte Carlo simulation. The simulation indicated that, compared to conventional position-sensitive photomultiplier tubes, the designed photo-sensor can detect Cherenkov photons, produced in upstream aerogel layers, more effectively, and the improvement factor in the Cherenkov photon yield is as high as 4. Less

我们利用多层气凝胶辐射体的新思想，研制了环形成像契伦科夫（RICH）探测器。具有多层气凝胶辐射器的RICH利用由不同折射率的两个或更多个气凝胶层组成的辐射器，这允许由于总辐射器厚度的增加而增加切伦科夫光子产率，同时避免与发射点的增加的不确定性相关联的单光子角分辨率的同时劣化。本研究的主要成果如下：1.我们在KEK进行了一次光束测试，使用的散热器由2至4层气凝胶组成。我们成功地证明了我们可以将切伦科夫光子产额提高1.5倍（从6 p.e. 9 p.e.）而不使单光子角分辨率（约13mrad）劣化。对折射率和厚度的优化组合进行了研究 ...更多信息的气凝胶层。气凝胶辐射器光学性能的改善我们对具有两层或三层不同折射率内层的气凝胶辐射器的研制方法进行了研究。我们发现有可能生产具有类似于单层气凝胶辐射器的光学质量的这种辐射器。光电探测的研究我们设计了一种由盖革模式APD和光导组成的新型光电传感器。我们对盖革模式APD的量子效率、时间分辨率和噪声性能等基本特性进行了测量。然后，我们使用详细的Monte Carlo模拟评估了具有这样的光传感器的气凝胶丰富的性能。模拟结果表明，与传统的位置敏感光电倍增管相比，所设计的光电传感器能够更有效地探测到上游气凝胶层中产生的切伦科夫光子，切伦科夫光子产额的改善因子高达4.少