Sentences with phrase «nuclear fusion reactions»

The goal in all this is to create the elusive «burn,» a self - sustaining nuclear fusion reaction that produces more energy than is used by the laser beams.

Understanding this instability is key to some experimental nuclear fusion reactions but it has never been observed for high - frequency radio waves.

Such powerful magnetic fields are required to keep the explosive nuclear fusion reactions contained.

On the other hand, «heavy» elements such as carbon and oxygen are synthesized by nuclear fusion reactions in stars.

Heavier elements are believed to have been formed later, by nuclear fusion reactions in stars.

In this activity students use E = mc2 to calculate the amount of energy released from nuclear fusion reactions in the Sun.

Deep inside the sun, plasma fuels nuclear fusion reactions, in which hydrogen atoms collide to form helium atoms, releasing massive amounts of energy.

Research at both LLE and NIF is based on inertial confinement, in which nuclear fusion reactions take place by heating and compressing — or imploding — a target containing a fuel made of deuterium and tritium (DT).

Researchers now believe this variation occurs because the star has burned all the hydrogen - helium nuclear fuel in its core into the heavier carbon and oxygen and puffed up into a cooler red giant, heated by unsteady nuclear fusion reactions in its remaining fuel shell.

Hydrodynamic shock code simulations supported the observed data and indicated highly compressed, hot (106 to 107 kelvin) bubble implosion conditions, as required for nuclear fusion reactions.

The electronlike particles called muons can catalyze nuclear fusion reactions, eliminating the need for powerful lasers or high - temperature plasmas.

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.

These devices heat the plasma to more than 150 million degrees Celsius, simulating the conditions that cause natural nuclear fusion reactions in stars.

Researchers at Sandia National Laboratories have announced a breakthrough that could lead to break - even nuclear fusion reactions within 2 - 3 years.

For decades scientists have sought to generate clean energy by instigating the kind of sustained nuclear fusion reactions that power the sun.

This form of energy is created from nuclear fusion reactions that take place at millions of degrees Celsius, but Mr. Fusion appears to work at room temperature.

Within the Sun's core, nuclear fusion reactions take place, with hydrogen nuclei being fused into helium nuclei.

Its first fusion experiments are expected in May, and in 2010 scientists hope to create something unprecedented: a self - sustained nuclear fusion reaction in a safe, controlled setting.

Among the main ingredients is helium - 3 (He - 3), a vestige of the Big Bang and nuclear fusion reactions in stars.

If enough material, mostly in the form of hydrogen gas, accumulates on the surface of the white dwarf, nuclear fusion reactions can occur and intensify, culminating into a cosmic - sized hydrogen bomb blast.

Some MACHOs may be neutron stars left behind after supernovae explosions, but most are thought to be tiny failed stars called brown dwarfs which have a mass of less than 8 per cent that of the Sun and are too small to sustain nuclear fusion reactions.

A brown dwarf is essentially a failed star, having formed the way stars do through the gravitational collapse of a cloud of gas and dust, but without gaining enough mass to spark the nuclear fusion reactions that make stars shine.

And what if these nonlinearities can be controlled in nuclear fusion reactions?

Although they are as common as stars and form in much the same way, brown dwarfs lack the mass necessary to sustain nuclear fusion reactions.

But what the authors were claiming was just so extraordinary: that nuclear fusion reactions, of the sort that power stars and hydrogen bombs, had been created on a lab bench using little more than a vibrating ring, a neutron gun and a beaker of specially prepared acetone.

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.

As the star dies, the nuclear fusion reactions stop because the fuel for these reactions gets used up.

All stars, including our sun, will eventually run out of the hydrogen gas that fuels the nuclear fusion reactions in their cores.