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Harry Daghlian
Haroutune Krikor Daghlian Jr. (May 4, 1921 – September 15, 1945) was an American physicist with the Manhattan Project, which designed and produced the atomic bombs that were used in World War II. He accidentally irradiated himself on August 21, 1945, during a critical mass experiment at the remote Omega Site of the Los Alamos Laboratory in New Mexico and died 25 days later from the resultant radiation poisoning. Daghlian was irradiated as a result of a criticality accident that occurred when he accidentally dropped a tungsten carbide brick onto a 6.2 kg plutonium–gallium alloy bomb core. This core, subsequently nicknamed the "demon core", was later involved in the death of another physicist, Louis Slotin. Early life Haroutune Krikor Daghlian Jr., of Armenian-American descent, was born in Waterbury, Connecticut, on May 4, 1921, one of three children of Margaret Rose (''née'' Currie) and Haroutune Krikor Daghlian. He had a sister, Helen, and a brother, Edward. Soon a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterbury, Connecticut
Waterbury is a city in the U.S. state of Connecticut on the Naugatuck River, southwest of Hartford and northeast of New York City. Waterbury is the second-largest city in New Haven County, Connecticut. According to the 2020 US Census, in 2020 Waterbury had a population of 114,403. As of the 2010 census, Waterbury had a population of 110,366, making it the 10th largest city in the New York Metropolitan Area, 9th largest city in New England and the 5th largest city in Connecticut. Throughout the first half of the 20th century, Waterbury had large industrial interests and was the leading center in the United States for the manufacture of brassware (including castings and finishings), as reflected in the nickname the "Brass City" and the city's motto ''Quid Aere Perennius?'' ("What Is More Lasting Than Brass?"). It was also noted for the manufacture of watches and clocks ( Timex). The city is alongside Interstate 84 (Yankee Expressway) and Route 8 and has a Metro-North railr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herbert Lehr And Haroutune Krikor Daghlian, Jr
Herbert may refer to: People Individuals * Herbert (musician), a pseudonym of Matthew Herbert Name * Herbert (given name) * Herbert (surname) Places Antarctica * Herbert Mountains, Coats Land * Herbert Sound, Graham Land Australia * Herbert, Northern Territory, a rural locality * Herbert, South Australia. former government town * Division of Herbert, an electoral district in Queensland * Herbert River, a river in Queensland * County of Herbert, a cadastral unit in South Australia Canada * Herbert, Saskatchewan, Canada, a town * Herbert Road, St. Albert, Canada New Zealand * Herbert, New Zealand, a town * Mount Herbert (New Zealand) United States * Herbert, Illinois, an unincorporated community * Herbert, Michigan, a former settlement * Herbert Creek, a stream in South Dakota * Herbert Island, Alaska Arts, entertainment, and media Fictional entities * Herbert (Disney character) * Herbert Pocket (''Great Expectations'' character), Pip's close friend and roommate in the Cha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Lafayette, Indiana
West Lafayette () is a city in Wabash Township, Tippecanoe County, Indiana, United States, about northwest of the state capital of Indianapolis and southeast of Chicago. West Lafayette is directly across the Wabash River from its sister city, Lafayette. As of the 2020 census, its population was 44,595. It is the most densely populated city in Indiana and is home to Purdue University. History Augustus Wylie laid out a town in 1836 in the Wabash River floodplain south of the present Levee. Due to regular flooding of the site, Wylie's town was never built. The present city was formed in 1888 by the merger of the adjacent suburban towns of Chauncey, Oakwood, and Kingston, located on a bluff across the Wabash River from Lafayette, Indiana. The three towns had been small suburban villages which were directly adjacent to one another. Kingston was laid out in 1855 by Jesse B. Lutz. Chauncey was platted in 1860 by the Chauncey family of Philadelphia, wealthy land speculators. Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Particle Physics
Particle physics or high energy physics is the study of fundamental particles and forces that constitute matter and radiation. The fundamental particles in the universe are classified in the Standard Model as fermions (matter particles) and bosons (force-carrying particles). There are three generations of fermions, but ordinary matter is made only from the first fermion generation. The first generation consists of up and down quarks which form protons and neutrons, and electrons and electron neutrinos. The three fundamental interactions known to be mediated by bosons are electromagnetism, the weak interaction, and the strong interaction. Quarks cannot exist on their own but form hadrons. Hadrons that contain an odd number of quarks are called baryons and those that contain an even number are called mesons. Two baryons, the proton and the neutron, make up most of the mass of ordinary matter. Mesons are unstable and the longest-lived last for only a few hundredths of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Day (New London)
''The Day'' newspaper, formerly known as ''The New London Day'', is a local newspaper based in New London, Connecticut, published by The Day Publishing Company. The newspaper has won Newspaper of the Year and the Best Daily Newspaper Award from the New England Newspaper & Press Association (NENPA). It has twice won the Horace Greeley Award for "courage and outstanding effectiveness in serving the public." It has won the American Society of Newspaper Editors Example of Excellence in Small Newspaper award and the ''Columbia Journalism Review'' has listed it as one of the top 100 newspapers in the country with a circulation of less than 100,000 copies. History ''The Day'' was founded in July 1881 as a mouthpiece of the local Republican Party in an era when many American newspapers served political parties. It was owned by a wealthy mercantile family in New London. In 1889, the original publisher, Maj. John A. Tibbits, left the paper to take a government post in England. The p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Massachusetts Institute Of Technology
The Massachusetts Institute of Technology (MIT) is a private land-grant research university in Cambridge, Massachusetts. Established in 1861, MIT has played a key role in the development of modern technology and science, and is one of the most prestigious and highly ranked academic institutions in the world. Founded in response to the increasing industrialization of the United States, MIT adopted a European polytechnic university model and stressed laboratory instruction in applied science and engineering. MIT is one of three private land grant universities in the United States, the others being Cornell University and Tuskegee University. The institute has an urban campus that extends more than a mile (1.6 km) alongside the Charles River, and encompasses a number of major off-campus facilities such as the MIT Lincoln Laboratory, the Bates Center, and the Haystack Observatory, as well as affiliated laboratories such as the Broad and Whitehead Institutes. , 98 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulkeley School
The Bulkeley School is a historic school building at 1 Bulkeley Place at the intersection of Hempstead Street in New London, Connecticut. It is a High Victorian Gothic stone structure, built in 1871–73 to a design by Leopold Eidlitz, with numerous additions. It was a private boys high school until 1951, educating generations of city leaders. The building was listed the National Register of Historic Places on August 13, 1981, for its architecture and its role in the city's development. It is now home to the Regional Multicultural Magnet School (RMMS), grades K-5. Description and history The Bulkeley School building is located a short way north of downtown New London, on a lot bounded by Huntington Street, Bulkeley Place, Hempstead Street, and Ye Antientist Burial Ground. The oldest portion of the building forms the western portion, with a larger modern brick structure to the east, overlooking Huntington Street. The older section is a built out of granite, and is stor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birth Name
A birth name is the name of a person given upon birth. The term may be applied to the surname, the given name, or the entire name. Where births are required to be officially registered, the entire name entered onto a birth certificate or birth register may by that fact alone become the person's legal name. The assumption in the Western world is often that the name from birth (or perhaps from baptism or '' brit milah'') will persist to adulthood in the normal course of affairs—either throughout life or until marriage. Some possible changes concern middle names, diminutive forms, changes relating to parental status (due to one's parents' divorce or adoption by different parents). Matters are very different in some cultures in which a birth name is for childhood only, rather than for life. Maiden and married names The French and English-adopted terms née and né (; , ) denote an original surname at birth. The term ''née'', having feminine grammatical gender, can be us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armenian American
Armenian Americans ( hy, ամերիկահայեր, ''amerikahayer'') are citizens or residents of the United States who have total or partial Armenian ancestry. They form the second largest community of the Armenian diaspora after Armenians in Russia. The first major wave of Armenian immigration to the United States took place in the late 19th and early 20th centuries. Thousands of Armenians settled in the United States following the Hamidian massacres of the mid-1890s, the Adana Massacre of 1909, and the Armenian genocide of 1915–1918 in the Ottoman Empire. Since the 1950s many Armenians from the Middle East (especially from Lebanon, Syria, Iran, Iraq, Egypt and Turkey) migrated to the U.S. as a result of political instability in the region. It accelerated in the late 1980s and has continued after the dissolution of the Soviet Union in 1991 due to socio-economic and political reasons. The 2017 American Community Survey estimated that 485,970 Americans held full or parti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louis Slotin
Louis Alexander Slotin (1 December 1910 – 30 May 1946) was a Canadian physicist and chemist who took part in the Manhattan Project. Born and raised in the North End of Winnipeg, Manitoba, Slotin earned both his Bachelor of Science and Master of Science degrees from the University of Manitoba, before obtaining his doctorate in physical chemistry at King's College London in 1936. Afterwards, he joined the University of Chicago as a research associate to help design a cyclotron. In 1942, Slotin was invited to participate in the Manhattan Project, and subsequently performed experiments with uranium and plutonium cores to determine their critical mass values. After World War II he continued his research at Los Alamos National Laboratory in New Mexico. On 21 May 1946, he accidentally began a fission reaction which released a burst of hard radiation. He was rushed to the hospital and died nine days later on 30 May. Slotin had become the victim of the second criticality accide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demon Core
The demon core was a spherical subcritical mass of plutonium in diameter, manufactured during World War II by the United States nuclear weapon development effort, the Manhattan Project, as a fissile core for an early atomic bomb. The core was prepared for shipment as part of the third nuclear weapon to be used in Japan, but when Japan surrendered, the core was retained at Los Alamos for testing and potential later use. It was involved in two criticality accidents at the Los Alamos Laboratory on August 21, 1945, and May 21, 1946, each resulting in a fatality. Both experiments were designed to demonstrate how close the core was to criticality with a tamper, but in each case, the core was accidentally placed into a supercritical configuration. Physicists Harry Daghlian and Louis Slotin suffered acute radiation syndrome (ARS) and died soon after, while others present in the lab were also exposed. Manufacturing and early history The demon core (like the second core used in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pit (nuclear Weapon)
The pit, named after the hard core found in fruits such as peaches and apricots, is the core of an implosion nuclear weapon – the fissile material and any neutron reflector or tamper bonded to it. Some weapons tested during the 1950s used pits made with U-235 alone, or in composite with plutonium, but all-plutonium pits are the smallest in diameter and have been the standard since the early 1960s. Pit designs Christy pits The pits of the first nuclear weapons were solid, with an ''urchin'' neutron initiator in their center. The Gadget and Fat Man used pits made of 6.2 kg of solid hot pressed plutonium-gallium alloy (at 400 °C and 200 MPa in steel dies – and ) half-spheres of diameter, with a internal cavity for the initiator. The Gadget's pit was electroplated with 0.13 mm of silver; the layer, however, developed blistering and the blisters had to be ground and plated with gold leaf before the test. The Fat Man pit, and those of subsequent models, were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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