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Electron Probe Microanalysis
An electron microprobe (EMP), also known as an electron probe microanalyzer (EPMA) or electron micro probe analyzer (EMPA), is an analytical tool used to non-destructively determine the chemical composition of small volumes of solid materials. It works similarly to a scanning electron microscope: the sample is bombarded with an electron beam, emitting x-rays at wavelengths characteristic to the elements being analyzed. This enables the abundances of elements present within small sample volumes (typically 10-30 cubic micrometers or less) to be determined,Wittry, David B. (1958). "Electron Probe Microanalyzer"US Patent No 2916621 Washington, DC: U.S. Patent and Trademark Office when a conventional accelerating voltage of 15-20 kV is used. The concentrations of elements from lithium to plutonium may be measured at levels as low as 100 parts per million (ppm), material dependent, although with care, levels below 10 ppm are possible. The ability to quantify lithium by EPMA became a real ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EPMA
An electron microprobe (EMP), also known as an electron probe microanalyzer (EPMA) or electron micro probe analyzer (EMPA), is an analytical tool used to non-destructively determine the chemical composition of small volumes of solid materials. It works similarly to a scanning electron microscope: the sample is bombarded with an electron beam, emitting x-rays at wavelengths characteristic to the elements being analyzed. This enables the abundances of elements present within small sample volumes (typically 10-30 cubic micrometers or less) to be determined,Wittry, David B. (1958). "Electron Probe Microanalyzer"US Patent No 2916621 Washington, DC: U.S. Patent and Trademark Office when a conventional accelerating voltage of 15-20 kV is used. The concentrations of elements from lithium to plutonium may be measured at levels as low as 100 parts per million (ppm), material dependent, although with care, levels below 10 ppm are possible. The ability to quantify lithium by EPMA became a reali ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Office National D'études Et De Recherches Aérospatiales
The Office National d'Etudes et de Recherches Aérospatiales (ONERA) is the French national aerospace research centre. It is a public establishment with industrial and commercial operations, and carries out application-oriented research to support enhanced innovation and competitiveness in the aerospace and defense sectors. ONERA was created in 1946 as "Office National d’Études et de Recherches Aéronautiques". Since 1963, its official name has been "Office National d’Études et de Recherches Aérospatiales". However, in January 2007, ONERA has been dubbed "The French Aerospace Lab" to improve its international visibility. History ONERA's historic roots are in the Paris suburb of Meudon, south of Paris. As early as 1877, this site hosted an aeronautical research center for military aerostats (balloons): Etablissement central de l’aérostation militaire. ONERA was created in May 1946 to relaunch aeronautics research, an activity that had gone into hibernation during t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mineralogy
Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. Specific studies within mineralogy include the processes of mineral origin and formation, classification of minerals, their geographical distribution, as well as their utilization. History Early writing on mineralogy, especially on gemstones, comes from ancient Babylonia, the ancient Greco-Roman world, ancient and medieval China, and Sanskrit texts from ancient India and the ancient Islamic world. Books on the subject included the ''Naturalis Historia'' of Pliny the Elder, which not only described many different minerals but also explained many of their properties, and Kitab al Jawahir (Book of Precious Stones) by Persian scientist Al-Biruni. The German Renaissance specialist Georgius Agricola wrote works such as '' De re metallica'' (''On Metals'', 1556) and ''De Natura Fossilium'' ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes of E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronics
The field of electronics is a branch of physics and electrical engineering that deals with the emission, behaviour and effects of electrons using electronic devices. Electronics uses active devices to control electron flow by amplification and rectification, which distinguishes it from classical electrical engineering, which only uses passive effects such as resistance, capacitance and inductance to control electric current flow. Electronics has hugely influenced the development of modern society. The central driving force behind the entire electronics industry is the semiconductor industry sector, which has annual sales of over $481 billion as of 2018. The largest industry sector is e-commerce, which generated over $29 trillion in 2017. History and development Electronics has hugely influenced the development of modern society. The identification of the electron in 1897, along with the subsequent invention of the vacuum tube which could amplify and rectify small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metallurgy
Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are known as alloys. Metallurgy encompasses both the science and the technology of metals; that is, the way in which science is applied to the production of metals, and the engineering of metal components used in products for both consumers and manufacturers. Metallurgy is distinct from the craft of metalworking. Metalworking relies on metallurgy in a similar manner to how medicine relies on medical science for technical advancement. A specialist practitioner of metallurgy is known as a metallurgist. The science of metallurgy is further subdivided into two broad categories: chemical metallurgy and physical metallurgy. Chemical metallurgy is chiefly concerned with the reduction and oxidation of metals, and the chemical performance of metals. Subjects of study in chemical metallurgy include mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Reactor
A nuclear reactor is a device used to initiate and control a fission nuclear chain reaction or nuclear fusion reactions. Nuclear reactors are used at nuclear power plants for electricity generation and in nuclear marine propulsion. Heat from nuclear fission is passed to a working fluid (water or gas), which in turn runs through steam turbines. These either drive a ship's propellers or turn electrical generators' shafts. Nuclear generated steam in principle can be used for industrial process heat or for district heating. Some reactors are used to produce isotopes for medical and industrial use, or for production of weapons-grade plutonium. , the International Atomic Energy Agency reports there are 422 nuclear power reactors and 223 nuclear research reactors in operation around the world. In the early era of nuclear reactors (1940s), a reactor was known as a nuclear pile or atomic pile (so-called because the graphite moderator blocks of the first reactor were placed into a tall pi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shimadzu Corporation
is a Japanese public KK company, manufacturing precision instruments, measuring instruments and medical equipment, based in Kyoto, Japan. It was established in 1875. The American arm of the company, Shimadzu Scientific Instruments, was founded in 1975. History Founding and early years The company was established by in 1875. During the 1890s and 1900s, Shimadzu experienced rapid growth that occurred at the same time as higher education grew in Japan. X-ray devices, the spectrum camera, the electron microscope, and the gas chromatograph were developed and commercialized in advance of other Japanese companies. Shimadzu became a corporation in 1917. The American arm of the company, Shimadzu Scientific Instruments, was founded in 1975. Developments The company also developed, in 2001, an ultra-high speed video camera, HyperVision HPV-1, which is capable of recording at 1,000,000 FPS, while in 2016 it released the HyperVision HPV-X2, a camera that achieves ultra-high-speed conti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
JEOL
is a major developer and manufacturer of electron microscopes and other scientific instruments, industrial equipment and medical equipment. Its headquarters are in Tokyo, Japan, with 25 domestic and foreign subsidiaries and associated companies as of 2014. It is listed in the top ten businesses worldwide for analytical laboratory instrument manufacturing. JEOL's instruments are used by researchers around the world, including the University of Cambridge, University of Oxford, and MIT. It has been included in the Activest Lux Nanotech Mutual Fund and the WestLB Nanotech Fund. History Scientists in Japan began to collaborate as early as 1939 on the development of an electron microscope. Kenji Kazato and Kazuo Ito met while working at the Naval Central Institute in Tokyo during World War II. After the war, Kazato attracted Ito and a group of others to Mobara, Chiba Prefecture, Japan. This initial group developed a prototype magnetic field–type electron microscope called the D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peter Duncumb
Peter Duncumb (born 26 January 1931) is a British physicist specialising in X-ray microscopy and microanalysis. He is best known for his contribution to the development of the first electron microprobe. Early life and education Duncumb was educated at Clare College, Cambridge. He earned his PhD in 1957, under the supervision of Vernon Ellis Cosslett. Career Duncumb worked at the University of Cambridge as a research fellow from 1957 until 1959. He carried out key work on the development of the scanning electron probe X-ray microanalyser, now a common tool for surface studies in most materials laboratories. His early work led to the first commercial instrument for imaging the distribution of selected chemical elements on a microscale, providing essential information for failure analysis and the development of new materials. After joining the Central Laboratories of Tube Investments in 1959, he built a second instrument, known as EMMA, combining X-ray microanalysis with tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Oatley
Sir Charles William Oatley OBE, FRS FREng (14 February 1904 – 11 March 1996) was Professor of Electrical Engineering, University of Cambridge, 1960–1971, and developer of one of the first commercial scanning electron microscopes. He was also a founder member of the Royal Academy of Engineering. Biography He was born in Frome on Valentine's Day, 14 February 1904. A plaque has been placed on the house at the junction of Badcox Parade and Catherine Hill. He was educated at Bedford Modern School and St. John's College, Cambridge. He lectured at King's College London for 12 years, until the war. He was a director of the English Electric Valve Company from 1966 to 1985. In 1969 he was elected to the Royal Society. Oatley also received an Honorary Doctorate from Heriot-Watt University in 1974. In that same year, he was knighted. He received an Honorary Degree (Doctor of Science) from the University of Bath in 1977. He retired from the English Electric Valve Company in 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
