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On the one hand, there are the approaches that lead to stationary thermonuclear reactions, and on the other hand, those that are based on the idea of utilizing an instantaneous temperature rise in transient processes of very brief duration. However, irrespective of the way the investigation is carried out, there is one problem that is inevitably encountered; namely, the insulation of the plasma, which is heated to a high temperature, from the walls of the vessel in which it is confined, In other words, a means must be found to keep the fast particles within the plasma over a period sufficient for the particles to have a good chance to react with each other.
As is known, thermonuclear reactions can arise if the temperature of matter is sufficiently high for atomic nuclei to surmount the forces of the Coulomb barrier with appreciable probability daring thermal collisions. The excitation of thermonuclear reaction in deuterium or in a mixture of deuterium and tritium is especially interesting since in this case a noticeable effect should be obtainable at relatively low temperatures.
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The problem of thermonuclear reactions is not a usual physics problem. This is a problem that must transform society and the world. Our generation, which gave to mankind atomic energy and thermonuclear energy in the form of explosions, is responsible to humanity for solving the main problem of energy – obtaining energy from water. People are waiting for the solution of this problem. Our duty is to solve it within the lifetime of our generation, and therefore we must set out on this path.
We considered here some features of the phenomena that accompany the passage of Intense pulse discharges through rarefied gases. The success of further work in this direction will greatly depend on the possibility of creating conditions under which the plasma column will experience multiple oscillations during build-up of the current without coming into contact with the walls.
The experience of past wars shows that the first use of a new technical or tactical method of attack is usually highly effective even if a simple antidote can soon be developed. But in a thermonuclear war the first blow may be the decisive one and render null and void years of work and billions spent on creation of an anti-missile system.
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It would be interesting to use high temperatures - in the billions, which develop during atomic bomb explosions, for conducting synthetic reactions (for example, the formation of helium from hydrogen), which are the source of energy of stars and which could raise the energy liberated during the explosion of basic matter (uranium, bismuth, lead) even higher.
Inductive reactance is much larger than atomic resistance in pulsed discharges in which the current In- creases+ at a high rate. Thus, by using current and voltage oscillograms one' may find the time dependence of the inductance of the plasma column and hence determine how the radius of the column changes at various stages.
While confident that our present strength will continue to deter a thermonuclear war, we must always be alert to the possibilities for limiting destruction which might be inflicted upon our people, cities and industry--should such a war be forced upon us. Many proposals have been advanced for means of limiting damage and destruction to the United States in the event of a thermonuclear war. Shifting strategy and advancing technology make the program of building adequate defenses against nuclear attack extremely complex. Decisions with respect to further limitation of damage require complex calculations concerning the effectiveness of many interrelated elements. Any comprehensive program would involve the expenditure of tens of billions of dollars. We must not shrink from any expense that is justified by its effectiveness, but we must not hastily expend vast sums on massive programs that do not meet this test. It is already clear that without fall-out shelter protection for our citizens, all defense weapons lose much of their effectiveness in saving lives. This also appears to be the least expensive way of saving millions of lives, and the one which has clear value even without other systems. We will continue our existing programs and start a program to increase the total inventory of shelters through a survey of private homes and other small structures. We shall continue the research and development which retains the options to deploy an anti-ballistic missile system, and manned interceptors and surface-to-air missiles against bombers.
However extraordinary the results shown may appear, they are but trifling compared with those which are attainable by apparatus designed on these same principles. I have produced electrical discharges the actual path of which, from end to end, was probably more than one hundred feet long; but it would not be difficult to reach lengths one hundred times as great. I have produced electrical movements occurring at the rate of approximately one hundred thousand horse-power, but rates of one, five, or ten million horse-power are easily practicable. In these experiments effects were developed incomparably greater than any ever produced by human agencies, and yet these results are but an embryo of what is to be.
I suppose that I should say a few words with respect to the possibility for future production and identification of additional transuranium elements, especially in view of the possibility of their production by heavy-ion bombardment of transuranium elements. As an aid to such a program the radioactive properties can be estimated, as I have already indicated, on the assumption of a smooth nuclear energy surface and the systematics of radioactivity. Again, I must emphasize that such considerations are negated in the event that a stable subshell of 148 neutrons should be found to exist, and this must be regarded as a definite possibility. It is interesting to note that our considerations on the systematics of spontaneous fission28 indicate that this method of decay will not compete seriously with radioactive decay until the region just beyond element 100. … These considerations illustrate clearly that one of the problems is that of conceiving means for producing nuclides of sufficiently high mass numbers with half-lives long enough for chemical identification. Thus, the serious problem is again the paucity of starting materials.
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