首个、首次、首台 本周 我国在工程建设、科学探测等领域 实现多项重大突破 中国科技与中国实力再度刷屏 用"中国精度"看宇宙 中微子实验首个重大成果发布 11月19日 江门中微子实验在建成两个月后首次发布重大科研成果 其对中微子相关参数的测量精度 比此前实验的最好精度提高了1.5~1.8倍 作为国际上首个运行的超大规模和超高精度的中微子专用大科学装置，江门中微子实验将助力科学家对来自太阳、超新星、大气和地球的中微子开展 前沿研究，其最主要的科学目标是解决粒子物理学领域未来十年内的一个重大问题，即：中微子的质量顺序，从而为探索未知物理世界打开新窗口。 江门中微子实验合作组发言人介绍 中微子实验的核心探测器达到了设计要求 中广核招远核电1号机组 核岛第一罐混凝土顺利浇筑 标志着山东招远核电基地建设全面启动 01:38 "华龙一号" 未来几年会把精度再提高几倍 实现用"中国精度"看宇宙 我国首个采用冷却塔的 "华龙一号"核电站正式开建 11月18日我国首个 采用冷却塔的"华龙一号"核电站 是我国自主研发的第三代核电技术 是目前全球在运和在建机组数量最多的 一种核电堆型 整个招远核电项目规划建设 6台华龙一号核电机组 ...

首个、首次、首台 本周 我国在工程建设、科学探测等领域 实现多项重大突破 中国科技与中国实力再度刷屏 用"中国精度"看宇宙 中微子实验首个重大成果发布 11月19日 江门中微子实验在建成两个月后 首次发布重大科研成果 其对中微子相关参数的测量精度 比此前实验的最好精度提高了1.5~1.8倍 我国首个采用冷却塔的 "华龙一号"核电站正式开建 11月18日 我国首个 采用冷却塔的"华龙一号"核电站 中广核招远核电1号机组 作为国际上首个运行的超大规模和超高精度的中微子专用大科学装置，江门中微子实验将助力科学家对来自太阳、超新星、 大气和地球的中微子开展前沿研究，其最主要的科学目标是解决粒子物理学领域未来十年内的一个重大问题，即：中微子的 质量顺序，从而为探索未知物理世界打开新窗口。 江门中微子实验合作组发言人介绍 中微子实验的核心探测器达到了设计要求 未来几年会把精度再提高几倍 实现用"中国精度"看宇宙 核岛第一罐混凝土顺利浇筑 标志着山东招远核电基地建设全面启动 "华龙一号" 是我国自主研发的第三代核电技术 是目前全球在运和在建机组数量最多的 一种核电堆型 整个招远核电项目规划建设 6台华龙一号核电机组 总装机 ...

来源：新华网 什么？！科学家正在地下捉"鬼"？ 但这个"鬼"，不是你想的那个鬼，而是被称为"幽灵粒子"的中微子。它，几乎无处不在，每秒有3亿亿 个太阳中微子穿过每个人的身体，我们却丝毫感觉不到。 要在浩瀚宇宙中捕捉到这个"幽灵"，如同大海捞针。广东江门的一处静谧山体深处，地下700米，中国 科学家历时10余年建了一个大"玻璃球"，正在抓中微子。 费这么大力气捕捉中微子，究竟是要干什么？今天，《大国总师》对话江门中微子实验（JUNO）首席 科学家王贻芳，听他讲讲中微子。 1 "幽灵粒子"是个啥？ 首先要说的是，它太神秘了！ 中微子是宇宙基本的粒子之一，也是最古老的物质粒子。现在，宇宙中每个角落都弥漫着巨量中微子， 大部分为宇宙大爆炸的残留，每立方厘米大概有300个。 它们以接近光速运动，几乎不与任何物质相互作用，穿透能力特别强，极难被探测，因此有"幽灵粒 子"之称。打个比方，地球的直径约是12700多公里，穿过地球这么厚的物质，100亿个中微子可能只会 被截住一个。 中微子就像宇宙留给人类的一道谜题，直到1956年，人类才首次通过核反应堆捕捉到中微子的踪迹。从 那时起，中微子便成为物理学研究的重要课题，但至今仍 ...

今天（19日），中国科学院高能物理研究所发布大科学装置——江门中微子实验正式运行后的首个重大 科研成果。 江门中微子实验由中国科学院高能物理研究所于2008年提出构想，2015年启动隧道和地下实验室建设。 2021年12月完成实验室建设并开始了探测器在地下实验室的安装建设。江门中微子实验的核心探测器为 有效质量达2万吨的液体闪烁体探测器，安置于地下实验大厅44米深的水池中央。直径41.1米的不锈钢 网壳作为主支撑结构，承载了包括35.4米直径的有机玻璃球、两万吨液体闪烁体、两万只20英寸光电倍 增管、两万五千只3英寸光电倍增管以及前端电子学、防磁线圈和隔光板等众多关键部件。遍布探测器 内壁的光电倍增管协同工作，探测中微子与液闪相互作用产生的闪烁光，并将其转换为电信号输出。 未来升级后将解决诸多领域的前沿交叉热点难题 作为国际上首个运行的超大规模和超高精度的中微子专用大科学装置，江门中微子实验将助力科学家对 来自太阳、超新星、大气和地球的中微子开展前沿研究。江门中微子实验的设计使用寿命为30年，后期 可升级改造为世界最灵敏的无中微子双贝塔衰变实验。升级后，该装置将探测中微子绝对质量，检验中 微子是否为马约拉纳粒 ...

Core Viewpoint - The construction and operation of the Jiangmen Neutrino Experiment (JUNO) represent a significant advancement in China's scientific capabilities, aiming to enhance the country's position in global scientific research and innovation [2][19]. Group 1: Overview of the Jiangmen Neutrino Experiment - The Jiangmen Neutrino Experiment is the world's largest and most precise liquid scintillator neutrino detector, marking a new chapter in neutrino research in China [2][4]. - The experiment aims to measure the mass hierarchy of neutrinos and improve the precision of neutrino oscillation parameters, contributing to the understanding of fundamental questions about matter and the universe [4][13]. Group 2: Technical Achievements - The experiment features a central detector with a 35.4-meter diameter acrylic sphere containing 20,000 tons of liquid scintillator, which is the largest of its kind globally [6][12]. - The detector's design includes 45,000 photomultiplier tubes, significantly increasing the effective detection area to 78%, surpassing other international experiments [13][15]. Group 3: Challenges and Solutions - The construction faced significant challenges, including geological difficulties due to the high water content of the rock and the need for a deep underground facility [9][10]. - A collaborative technical team was formed to address these challenges, leading to innovative construction methods and the successful installation of critical components [9][11]. Group 4: Impact on Industry and Research - The project has spurred advancements in related industries, enhancing the technological capabilities of domestic manufacturers involved in producing key components like the photomultiplier tubes and acrylic sphere [17][21]. - The successful operation of JUNO is expected to attract international collaboration, positioning China as a leader in neutrino research and contributing to the global scientific community [17][22].

Core Viewpoint - The Jiangmen Neutrino Experiment, a significant scientific project in China, has officially commenced operations, marking a major milestone in the country's contributions to fundamental physics research and neutrino studies [2][3]. Group 1: Project Background - The Jiangmen Neutrino Experiment is the successor to the Daya Bay Neutrino Experiment, which established China's leading position in the field of neutrino research [3]. - The project was conceived in 2008, officially approved in 2013, and construction began in 2015, taking a total of 17 years to complete [2][3]. Group 2: Challenges and Achievements - The construction faced numerous challenges, including unexpected water inflow during excavation and the need for innovative solutions due to the project's unprecedented scale and precision [4]. - The successful completion of the Jiangmen Neutrino Experiment is seen as a testament to the dedication and spirit of Chinese scientists, showcasing their commitment to advancing fundamental science [4][5]. Group 3: Cultural Impact - A literary work titled "Micro Light Will" has been published, documenting the 17-year journey of the Jiangmen Neutrino Experiment, highlighting the experiences of researchers involved [5]. - This book serves not only as a record of scientific achievement but also as a means to inspire and convey the spirit of scientific pursuit in China [5].

Core Insights - The Jiangmen Neutrino Experiment (JUNO) has officially begun data collection as of August 26, 2023, aiming to address significant questions in particle physics, particularly the mass ordering of neutrinos [1][2] - This facility, constructed over more than a decade, is designed to provide high-precision measurements of neutrino oscillation parameters and explore various astrophysical phenomena [1][2] Group 1 - The experiment is located 700 meters underground in Jiangmen, Guangdong, featuring a large organic glass sphere with a diameter exceeding 35 meters, which captures neutrinos [1] - Neutrinos are fundamental particles that constitute the material world and are the most abundant particles in the universe, yet many mysteries surrounding them remain unsolved [1][2] - The core detector of the experiment contains 20,000 tons of liquid scintillator, with thousands of photomultiplier tubes embedded in its outer wall to detect weak light signals generated by neutrino interactions [1][2] Group 2 - The project team successfully filled over 60,000 tons of ultra-pure water within 45 days, ensuring the liquid level difference between the inner and outer spheres is controlled to a centimeter level, with a flow deviation of no more than 0.5% [2] - The experiment is a collaboration involving approximately 700 researchers from 17 countries and regions, marking the first operation of such a large-scale and high-precision neutrino-specific scientific facility internationally [2] - The design lifespan of the Jiangmen Neutrino Experiment is planned for 30 years, with potential upgrades to conduct double beta decay experiments to investigate the absolute mass of neutrinos and whether they are Majorana particles [2]

Core Insights - The Jiangmen Neutrino Experiment (JUNO) has officially commenced data collection as of August 26, 2023, aiming to address significant questions in particle physics, particularly the mass ordering of neutrinos [1][2] - This facility, constructed over more than a decade, represents a major advancement in neutrino research, building on previous experiments like the Daya Bay Neutrino Experiment [1][2] Group 1: Project Overview - The JUNO facility is located 700 meters underground in Jiangmen, Guangdong, featuring a large acrylic sphere with a diameter exceeding 35 meters designed to detect neutrinos [1] - The experiment will not only focus on neutrino mass ordering but also measure neutrino oscillation parameters with higher precision and explore various astrophysical phenomena [1][2] Group 2: Technical Achievements - The project team successfully filled over 60,000 tons of ultra-pure water within 45 days, maintaining a liquid level difference within centimeters and a flow deviation of less than 0.5%, ensuring the stability and safety of the detector [2] - This experiment is the first of its kind to operate a large-scale, high-precision neutrino detection facility internationally, providing insights into fundamental questions about matter and the universe [2] Group 3: Future Prospects - The JUNO facility is designed for a lifespan of 30 years, with potential upgrades to conduct double beta decay experiments to investigate the absolute mass of neutrinos and test if they are Majorana particles [2] - The collaboration involves approximately 700 researchers from 17 countries and regions, marking a significant international effort in advancing neutrino physics [2]

Core Insights - The Jiangmen Underground Neutrino Observatory (JUNO) has successfully completed the infusion of 20,000 tons of liquid scintillator and has officially begun data collection, marking a significant milestone in neutrino research [5][9] - This facility is the first large-scale, high-precision neutrino detector in the world, aimed at addressing major questions in particle physics, particularly the mass ordering of neutrinos [5][6] Project Overview - The JUNO project was proposed by the Institute of High Energy Physics of the Chinese Academy of Sciences in 2008, receiving support from the Chinese Academy of Sciences and the Guangdong provincial government [8] - Construction began in 2015, with the laboratory completed in December 2021, and the detector's main construction expected to be finished by December 2024 [8] Technical Achievements - The core detector has an effective mass of 20,000 tons and is located 700 meters underground, allowing it to detect neutrinos from nearby nuclear power plants with unprecedented precision [6][9] - The detector's construction involved the infusion of over 60,000 tons of ultra-pure water within 45 days, ensuring safety and stability [8] International Collaboration - The JUNO project involves 700 researchers from 17 countries and regions, highlighting significant international collaboration in advancing neutrino detection technology [9] - The project is expected to have a lifespan of 30 years, with potential upgrades to enhance its capabilities for future experiments [9]

Core Insights - The Jiangmen Neutrino Experiment (JUNO) has successfully completed the infusion of 20,000 tons of liquid scintillator and has officially begun data collection, marking a significant milestone in particle physics research [1][2] - This experiment is the first of its kind in the world, featuring a large-scale and high-precision neutrino detection facility, which aims to address the fundamental question of neutrino mass ordering [1][2] Group 1: Experiment Overview - The JUNO project is led by the Institute of High Energy Physics of the Chinese Academy of Sciences and involves approximately 700 researchers from 74 institutions across 17 countries and regions [2] - The detector is located 700 meters underground in Jiangmen, Guangdong Province, and is capable of detecting neutrinos produced by nearby nuclear power plants, as well as those from solar, supernova, atmospheric, and terrestrial sources [1] Group 2: Scientific Significance - Understanding the mass ordering of neutrinos is crucial as it is a fundamental parameter that influences the evolution of the universe [1] - The successful operation of JUNO will pave the way for determining neutrino masses and conducting further research in unexplored areas of physics, including the search for sterile neutrinos and proton decay [1]