Cooperative Study on Non-Accelerator Physics between Japan and Italy(LVD+LMD)project

日本与意大利非加速器物理合作研究（LVD LMD）项目

• 批准号: 02044025
• 负责人: MISAKI Akeo
• 金额: $ 16.64万
• 依托单位: Saitama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02044025/
• 关键词: Cosmic neutrinos; Large Volume Detector (LVD); the Gran Sasso Laboratory; a combined telescope of the EAS-TOP and LVD; steller collapse signals; the underground laboratory at Mont Blanc; TL-sheet stacks; a slow GUT monopole; 非加速器物理; グランサッソ-地下実験所

1.The Large Volume Detector (LVD) in the Gran Sasso underground Laborato is a multipurpose detector consisting of a large volume of liquid scintillator interleaved with limited streamer tubes in a compact 3-dimensional geometry. A major purpose of the LVD neutrino observatory is to search for stellar collapses. The detector has a modular structure composed of 190 modules arranged in 5 towers. Each modules has 8 scintillation counters surrounded by an L-shaped tracking system. The total mass is 1840 tons of scintillator and the dimensions are 40mX12mX13m. Presently the first tower is taking data and the second is under construction. The first tower (368 tons) was turned on in June 1992. This mass of liquid scintillator makes the first LDV tower one of the largest supernovae neutrino observatories in the world and the largest one based on liquid scintillator.The LVD group presented the power of LVD to study low-energy neutrinos, the results of a search for steller collapse signals during this initial period and the first results of the combined measurements of the EAS-TOP (at the surface) and LVD (deep underground) detectors operating as a combined telescope in study of UHE cosmic rays and their interactions. As examples, different classes of events and their significance in different high-energy and astrophysical were studied.2.A thermoluminescent sheet and its readout system hava been developed for the detection of supper-slow massive particles. The TL-sheet stacks of the 50m^2 were set Mont Blanc tunnel for two years. The X-ray films of 17m^2・year were analyzed. Two candidates were found and one result of their TL-sheet read-outs corresponds that of a slow GUT monopole (beta=10^<-4>).

1.Gran Sasso地下实验室的大体积探测器(LVD)是一种多用途探测器，由大体积液体闪烁体和紧凑的三维几何形状的有限流光管交错组成。LVD中微子天文台的一个主要目的是寻找恒星坍塌。该探测器具有模块化结构，由5个塔中的190个模块组成。每个模块都有8个闪烁计数器，周围环绕着一个L形状的跟踪系统。闪烁体总质量为1840吨，尺寸为40mx12mx13米。目前，第一座塔正在接收数据，第二座塔正在建设中。第一座塔(368吨)于1992年6月启动。这一质量的液体闪烁体使第一座LDV塔成为世界上最大的超新星中微子天文台之一，也是最大的基于液体闪烁体的超新星中微子观测站。LVD小组展示了LVD在研究低能中微子方面的能力，在初始阶段对恒星坍塌信号的搜索结果，以及在研究UHE宇宙线及其相互作用时作为组合望远镜运行的EAS-TOP(地表)和LVD(地下深处)探测器的第一次联合测量结果。作为例子，研究了不同类型的事件及其在不同高能和天体物理中的意义。2.研制了一种用于超慢质量粒子探测的热释光片及其读出系统。50m^2的TL-Sheet堆栈被设置在勃朗峰隧道两年。对17m^2·年的X线片进行了分析。发现了两个候选者，他们的TL-Sheet读出的一个结果对应于慢的肠道单极子(β=10^；lt；-4)。

项目成果

E.Lonishi et al: "ON THE CHARACTERISTICS OF INDIVIDUAL CASCADE SHOWERS WITH THE LPM EFFECT IN EXTREMELY HIGH ENERGY" Journal of Physics G:Nuclear and Particle Physics. 229ー90ー22. 1-27 (1990)

E.Lonishi 等人：“关于极高能量下 LPM 效应的独立级联阵雨的特征”，《物理学杂志》G：核与粒子物理学 229-90-22（1990 年）。

M.AGLIETTA: "First Observation of High-Energy Cosmic-Ray Events Obtained in Coincidence between EAS-TOP and LVD at Gran Sasso" I1 Nuovo Cimento. 105. 1815-1823 (1992)

M.AGLIETTA：“首次观测到 EAS-TOP 和格兰萨索 LVD 同时发生的高能宇宙射线事件”I1 Nuovo Cimento。

M. Aglietta: "The Most Powerful Scintillator Supernovae Detector : LVD" Il Nuovo Cimento. 105. 1793-1804 (1992)

M. Aglietta：“最强大的闪烁体超新星探测器：LVD”Il Nuovo Cimento。

M. Aglietta: "First Observation of High Energy Cosmic Ray Events Obtained in Coincidence between EAS-TOP and LVD at Gran Sasso" Il Nuovo Cimento. 105. 1815-1823 (1992)

M. Aglietta：“在格兰萨索的 EAS-TOP 和 LVD 同时获得的高能宇宙射线事件的首次观测”Il Nuovo Cimento。

A.Misaki: "A study of Electromagnetic Cascade Shower with the LPM Effect in Water for the Detection of Extremely High Energy Neutrinos" Fortschritte der Physik. 38. 413-446 (1990)

A.Misaki：“电磁级联喷淋与水中 LPM 效应的研究，用于检测极高能中微子”Fortschritte der Physik。