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洛斯阿拉莫斯國(guó)家實(shí)驗(yàn)室 Los Alamos National Laboratory，LANL  
洛斯阿拉莫斯國(guó)家實(shí)驗(yàn)室（Los Alamos National Laboratory，LANL，曾被稱為洛斯阿拉莫斯實(shí)驗(yàn)室、洛斯阿拉莫斯科學(xué)實(shí)驗(yàn)室），隸屬美國(guó)能源部的國(guó)家實(shí)驗(yàn)室，位于新墨西哥州的洛斯阿拉莫斯 (新墨西哥州)。
1945年7月，該實(shí)驗(yàn)室研制首枚原子彈，曼哈頓計(jì)劃的所在地，在冷戰(zhàn)時(shí)扮演美國(guó)軍事研究的重要基地。實(shí)驗(yàn)室目前是全球最大的跨學(xué)科研究機(jī)構(gòu)之一。它是新墨西哥州北部最大的研究機(jī)構(gòu)和雇員最多的機(jī)構(gòu)，約有10,400名加利福尼亞大學(xué)雇員，以及大約2,800名合同雇員。
實(shí)驗(yàn)室約三分之一的技術(shù)人員是物理學(xué)專家、四分之一是工程師、六分之一是化學(xué)和材料專家，其余的工作在數(shù)學(xué)和計(jì)算科學(xué)、生物科學(xué)、地質(zhì)科學(xué)等其他學(xué)科。也有外部的專家和學(xué)生來實(shí)驗(yàn)室做訪問研究工作。實(shí)驗(yàn)室聯(lián)合大學(xué)和工業(yè)界進(jìn)行能源方面的基礎(chǔ)和應(yīng)用研究。實(shí)驗(yàn)室年度預(yù)算約為22億美元。
洛斯阿拉莫斯是美國(guó)設(shè)計(jì)核武器的兩個(gè)機(jī)構(gòu)之一，另一個(gè)是勞倫斯利福摩爾國(guó)家實(shí)驗(yàn)室（始于1952年）。
不過，該實(shí)驗(yàn)室近年出現(xiàn)多宗丑聞，包括遺失機(jī)密數(shù)據(jù)、錯(cuò)誤起訴一名華人科學(xué)家李文和充當(dāng)間諜，2004年實(shí)驗(yàn)室需要大規(guī)模重組，2006年6月，多年來一直營(yíng)運(yùn)實(shí)驗(yàn)室的加州大學(xué)交出管理權(quán)，實(shí)驗(yàn)室交由新成立的“洛斯阿拉莫斯國(guó)家安全委員會(huì)”全面接手，成員包括加州大學(xué)及多間軍火營(yíng)辦商，新委員會(huì)的目標(biāo)將要令實(shí)驗(yàn)室盈利。

Los Alamos National Laboratory (or LANL; previously known at various times as Project Y, Los Alamos Laboratory, and Los Alamos Scientific Laboratory) is one of two laboratories in the United States where classified work towards the design of nuclear weapons is undertaken. The other, since 1952, is Lawrence Livermore National Laboratory. LANL is a United States Department of Energy (DOE) national laboratory, managed and operated by Los Alamos National Security (LANS), located in Los Alamos, New Mexico. The laboratory is one of the largest science and technology institutions in the world. It conducts multidisciplinary research in fields such as national security, space exploration, renewable energy,[2] medicine, nanotechnology, and supercomputing.
LANL is the largest institution and the largest employer in northern New Mexico, with approximately 9,000 direct employees and around 650 contractor personnel.[3] Additionally, there are roughly 120 DOE employees stationed at the laboratory to provide federal oversight of LANL's work and operations. Approximately one-third of the laboratory's technical staff members are physicists, one quarter are engineers, one-sixth are chemists and materials scientists, and the remainder work in mathematics and computational science, biology, geoscience, and other disciplines. Professional scientists and students also come to Los Alamos as visitors to participate in scientific projects. The staff collaborates with universities and industry in both basic and applied research to develop resources for the future. The annual budget is approximately US$2.2 billion.