Sentences with phrase «nuclear fusion process»

Brown dwarfs are essentially substellar bodies that failed to gather enough mass during their formative period to sustain the nuclear fusion process raging at the heart of other main sequence stars.

«What we've done is show the advantages of a direct - drive laser in the nuclear fusion process,» said Campbell.

Above this mass, in the upper main sequence, the nuclear fusion process can instead use atoms of carbon, nitrogen, and oxygen as intermediaries in the production of helium from hydrogen atoms.

Upon reaching a suitable density, energy generation is begun at the core using an exothermic nuclear fusion process that converts hydrogen into helium.

Similar to the nuclear fusion process that powers our sun.

Not exact matches

(All existing reactors operate using nuclear fission, rather than fusion, which is a very different process.)

Before we understood the process of nuclear fusion, we were off by orders of magnitude.

Attempts at nuclear fusion are not part of some biological adaptive «survival of the fittest» process but show our transcendence of a merely material law of control and direction.

PANCAKES have been getting in the way of nuclear fusion: the process comes unstuck when fuel pellets end up spread out flat.

They set out to understand the unexpected instabilities that arose when scientists sparked and tried to contain nuclear fusion, the process that fuels the stars.

For less massive stars like the Sun the process that brings them into existence is quite well understood — as clouds of gas are pulled together under gravity, density and temperature increase, and nuclear fusion begins)-- but for the most massive stars buried in regions like RCW 106 this explanation does not seem to be fully adequate.

Nuclear fusion in stars and supernovae is the primary process by which new natural elements are created.

The fusion of two nuclei lighter than iron or nickel generally releases energy while the fusion of nuclei heavier than iron or nickel absorbs energy; vice-versa for the reverse process, nuclear fission.

Nuclear fusion, the process that powers our sun, happens when nuclear reactions between light elements produce heavieNuclear fusion, the process that powers our sun, happens when nuclear reactions between light elements produce heavienuclear reactions between light elements produce heavier ones.

They are abundantly produced in supernova explosions, star - powering nuclear fusion and other nuclear processes, resulting in trillions of neutrinos passing through us every minute.

Nuclear fusion is an important natural process: Many chemical elements originate from hydrogen through fusion; fusion is the energy source of the sun and stars.

Nuclear fusion is the process that powers the sun and stars.

Unlike nuclear fission, fusion is a very difficult process to get started.

FOOTHILL RANCH, CALIFORNIA — In a suburban industrial park south of Los Angeles, researchers have taken a significant step toward mastering nuclear fusion — a process that could provide abundant, cheap, and clean energy.

On 23 March 1989, two chemists working at the University of Utah, Stanley Pons and Martin Fleischmann, stunned the world with their claim to have harnessed nuclear fusion — the process that powers the Sun — in a test tube of water at room temperature.

Fleischmann and Pons said this process could not be caused by any known chemical reaction, and the nuclear reaction term «cold fusion» was attached to it.

The Homestake experiment detects the high - energy neutrinos that are produced by two minor branches of the «proton - proton chain», the process of nuclear fusion in which sets of four protons combine to make nuclei of helium - 4.

As a white dwarf draws off hydrogen - rich material from a binary companion over millions of years, Gilfanov says, it experiences a steady process of nuclear fusion on its surface that gives off tremendous amounts of radiation.

Long before descending into scientific infamy, Hoyle made what should have been a lasting contribution with a 1954 Astrophysical Journal paper laying out a process by which stars heavier than 10 suns would burn hydrogen and helium at their cores into heavier elements through a progressively hotter series of nuclear fusion reactions.

An American research team in January discovered a way to initiate nuclear fusion reactions in a process called «fast ignition» by using a high - intensity laser, according to the American Association for the Advancement of Science.

nuclear power Energy derived from processes that produce heat by splitting apart the nuclei of atoms (fission) or forcing atomic nuclei to merge (fusion).

Once nuclear fusion of hydrogen becomes the dominant energy production process and the excess energy gained from gravitational contraction has been lost, [9] the star lies along a curve on the Hertzsprung - Russell diagram (or HR diagram) called the standard main sequence.

In lower - mass stars like the Sun, however, there is insufficient mass to squeeze the core to the temperatures needed for this chain of fusion processes to proceed, and eventually the outermost layers extend so far from the source of nuclear burning that they cool to a few thousand kelvins.

Hannah Willett of Physics at York uses the Binding Blocks chart to explain the process of nuclear fusion, and how creating «mini-suns» on earth could be an important clean energy source for the future.

As a star that has evolved out of the «main sequence,» Gacrux has shifted fully from the fusion of hydrogen to helium at its core to the fusion of helium to carbon and oxygen, with trace activity of other nuclear processes.

The process of converting mass to energy from falling onto a black hole has an efficiency that is over ten times as large as the efficiency of nuclear fusion.

Additionally, by engineering FP fusions associated with cellular organelles, scientists have been able to study many cellular processes, including mitosis, mitochondrial fission / fusion, nuclear import, and neuronal trafficking.

Dubbed the compact fusion reactor (CFR), the device is conceptually safer, cleaner and more powerful than much larger, current nuclear systems that rely on fission, the process of splitting atoms to release energy.

As a star that has evolved out of the «main sequence,» Arcturus has fully shifted from the fusion of hydrogen to helium in at its core to the fusion of helium to carbon and oxygen, with trace activity of other nuclear processes.

As a star that has evolved out of the «main sequence,» Pollux has fully shifted from the fusion of hydrogen to helium at its core to the fusion of helium to carbon and oxygen, with trace activity of other nuclear processes.

During that time, it will continue to convert hydrogen into helium in its core through a process called nuclear fusion.

Nuclear fusion, the process that powers our sun, could power the world almost indefinitely.

Nuclear fusion is being looked to as a potentially limitless source of clean energy, created by the same core processes inside the sun.

«In the process of undergoing these nuclear fusion reactions, the sun emits large amounts of heat and light.

This process is called nuclear fusion.

Georgetown University Medical Center (Washington, DC) 05/2007 — 01/2010 Imaging Science and Information Systems Center — Insert Title • Train, supervise, and assure the work quality of a team of 3 - 6 regional analysts • Write analytical summaries of open source collections of biological threats and other national security threats • Develop and refine indication and warning methodologies and taxonomies for biological and radiological threats • Offer guidance and expertise on intelligence community interagency fusion cell for H1N1 «swine flu» • Assist in research and development work on plant health project • Conduct case studies on state and non-state actor biological weapons programs and orphan source radiological incidents • Participate in multi-agency tracking of nuclear proliferation activities in Eastern Europe, Central Asia, and the Middle East • Perform project lead duties, participate in the selection process of new employees, and assist with performance appraisals • Awarded the National Intelligence Medallion for organizational work on Project Argus