Sentences with phrase «fusion reactions»

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

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.

Success of the effort could deepen understanding of a fundamental cause of the loss of heat from fusion reactions.

New research suggests scientists are getting close to using magnetic fields and powerful particle beams to control fusion reactions.

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

Scientists knew that fusion reactions deep within the sun created heat, and that this heat moved outward.

It produces radiation that generates the high pressures and temperatures needed to create secondary fusion reactions from the bomb's hydrogen fuel — the process behind an H - bomb's horrific destructive force.

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

Second, we must look for something that can be based on a low or zero neutron fusion reaction.

The disappointment resulted in fusion reaction experiments losing priority as focus on the best use of public funds shifted.

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

Stellarators are fusion devices that use twisting, potato chip - shaped magnetic coils to confine the plasma that fuels fusion reactions in a three - dimensional and steady - state magnetic field.

And finally there was the follow - up study (not yet subjected to peer review) by another team at Oak Ridge that claimed that the evidence of fusion reactions disappeared when it repeated the experiment with different sensors and analyzed the data in a different way.

RADIATION DETECTION EQUIPMENT Prove that you really achieved fusion by using a bubble dosimeter, which provides instant visual verification and measurement of neutrons produced by fusion reactions.

Using a different reactor shape than ITER and, eventually, superconducting magnets, the company says it has a cheaper and faster path to an energy - producing fusion reaction.

Some of that material then may contaminate the fuel and increase radiation losses, causing the fuel temperature to collapse below that needed for fusion reactions to occur.»

But the National Ignition Facility (NIF) in Livermore, California, is still a long way from sparking a self - sustaining fusion reaction with an overall gain in energy — a process called ignition.

Some scientists propose creating power sources and electricity by igniting fusion reactions with lasers that trigger nuclear fission that can consume spent nuclear fuel.

Sudden loss can halt fusion reactions and damage plasma - facing components.

Achieving a reasonable - sized fusion reaction on the tabletop has been out of reach.

The gold cylinder where fusion reactions take place at NIF.

Among the puzzles is how temperature affects the ability of lithium to absorb and retain the deuterium particles that stray from the fuel that creates fusion reactions.

NSTX - U draws on a 65 - year - old legacy of fusion energy research at Princeton University's Plasma Physics Laboratory, where in the 1950s physicist Lyman Spitzer created a machine he called a stellarator to produce energy the same way as the sun — through fusion reactions where light elements collide and fuse together, releasing enormous amounts of energy.

The huge National Ignition Facility aims to achieve fusion reactions using the world's most powerful lasers.

Before achieving ignition, a key step along the path is to have «fuel gains» greater than unity, where the energy generated through fusion reactions exceeds the amount of energy deposited into the fusion fuel and alpha - particle self - heating of the fusing region.

The electron beam heats the plasma ball, igniting fusion reactions between the hydrogen and boron; these reactions pump more heat and charged particles into the plasma.

Such progress marks steps toward lengthening the confinement time of the hot, charged plasma gas that fuels fusion reactions within the optimized machine.

The ability to accurately determine the rate of this H - 17O fusion reaction provides nuclear physicists with another key puzzle piece, alongside direct observations of oxygen elemental and isotopic abundances in stellar atmospheres and in primitive meteorites, to zero in on complete and accurate models of stars.

What's more, the helium nuclei generated during the experimental runs are colliding with fuel in the pellet, sparking further fusion reactions.

A breakthrough occurred at the Laboratory for Experimental Nuclear Astrophysics (LENA) at the Triangle Universities Nuclear Laboratory, where a combination of a very high hydrogen beam current (2.0 mA on target) and strong detector background reduction (by two orders of magnitude) enabled researchers to probe the H - 17O fusion reaction directly at stellar energies.

Brown dwarfs are too big to be planets but too small to be true stars, as they have too little mass to trigger hydrogen fusion reactions at their cores, the source of the energy output in larger stars.

The process when optimized should allow fusion reactions to occur at 1 to 2 percent of the density and pressure required in traditional inertial confinement fusion, which has used either laser - created X-ray pulses or direct laser illumination to spherically compress a pea - sized capsule containing fusion fuel.

Researchers have long wondered how atoms recycled from the walls of tokamaks that house fusion reactions affect turbulence, the random fluctuation of plasma that can cause heat and particle loss.

Individual fusion reactions are executed by distinct combinations of SNARE and SM proteins to ensure specificity, and are controlled by regulators that embed the SM - SNARE fusion machinery into a physiological context.

Thus, synaptobrevin 2 may function in catalyzing fusion reactions and stabilizing fusion intermediates but is not absolutely required for synaptic fusion.

This star is a recent corpse: The surrounding gas, fluorescing and whipping into waves, was once the star's atmosphere but was cast off when fusion reactions stopped in its core.

The recent success of the U.S. government - funded National Ignition Facility in generating a laser - assisted fusion reaction where the hydrogen - based fuel served up as much energy as was directed at it is not so much competition as a source of credibility for a global fusion research effort that «has had some false starts,» Gilliland says.

Hot plasma in fusion reactions bites pieces from the reactor walls, creating metallic dust.

Thus, the closed conformation of syntaxin - 1 gates the initiation of the synaptic vesicle fusion reaction, which is then mediated by SNARE - complex / Munc18 -1 assemblies.

SNAREs (soluble NSF - attachment protein receptors) are generally acknowledged as central components of membrane fusion reactions, but their precise function has remained enigmatic.

Scientists can already trigger limited fusion reactions in the lab and abundant (if somewhat uncontrolled) reactions in a hydrogen bomb.

The findings provide the physics - basis for the successful operation of current and future tokamaks that will produce powerful and economical fusion reactions.

Admittedly, the project is a little dangerous — not because of a few little fusion reactions but because of the the very flammable gas and voltages high enough to instantly kill you.

Then, the first stars appeared, and heavier elements (referred to as «metals,» meaning anything heavier than helium) were created by thermonuclear fusion reactions within stars.

These plasmas drive fusion reactions, giving off helium and flashes of energetic neutrons.

The strongest manmade fields make particle collider and fusion reactions possible.