Dragon experiment

Brilliant young Richard Feynman laughed when he heard Frisch s plan and named it he said it would be like tickling the tail of a sleeping dragon. The Dragon experiment it became. 

No one doubted that Little Boy would work if any design would. Otto Frisch s Dragon experiments had proven the efficacy of the fast-neutron chain reaction in uranium. The gun mechanism was wasteful and inefficient but U235 was forgiving. It remained to test implosion. While doing so... 

The guillotine mechanism for studying supercritical assemblies (the Dragon experiment). 68. The first RaLa test Note Army tanks for observers, lower left. 

CRITICAL MASS. The least mass of fissionable material that will allow a self-sustaining nuclear chain reaction. Any nuclear weapon must have a critical mass in order for the nuclear fuel to act as an explosive. See also DRAGON EXPERIMENT PREINITIATION. 

DAGHLIAN, HARRY KRIKOR, JR. (1921-1945). U.S. physicist. On 15 September 1945, Daghlian died of acute radiation sickness, 24 days after an accident during an unauthorized Dragon Experiment. His death is credited as the first peacetime nuclear fission-related fatality. 

Assigned to Site Y (which would later be designated the Los Alamos National Laboratory), Frisch conducted the Dragon Experiment, determining the critical mass of uranium-235, and later of plutonium-239. Both results were essential to developing the nuclear weapons that were used successfully against Japan in August 1945. 

In 1786 William Nieholson wrote A Dictionary of Practical and Theoretical Chemistry. In this work Nicholson mentions that a chemist named Neuman, on distillation of storax (a balsam derived from the tree Liquambar orientalis), had produced a fragrant empyreumatic oil . In 1839 E. Simon carried out some similar experiments, apparently quite independently, and again obtained this essential oil which he ealled styrol. In 1845 M. Glenard and R. Boudault reported on the production of styrol (now known as styrene) by dry distillation of dragons blood, a resin obtained from the fruit of the Malayan rattan palm. 

This return corresponds to a different quality of regressive work, when the container provided by the analytic situation permits the experience of less differentiated states that are not to be confused with a return to a developmental experience of infancy. Furthermore, this regression must be contained and attended by the patient s ego, which has been tempered by the analytic work up to this point (symbolized by the alembic). The challenge for the patient and the analyst will be to contain but not mortally wound the young dragon, with its threat of madness and its essential but unchanneled vitality. 

In order to get more experience with the newly proposed index ( ) we will consider the leading eigenvalue X of D/D matrices for several well-defined mathematical curves. We should emphasize that this approach is neither restricted to curves (chains) embedded on regular lattices, nor restricted to lattices on a plane. However, the examples that we will consider correspond to mathematical curves embedded on the simple square lattice associated with the Cartesian coordinates system in the plane, or a trigonal lattice. The selected curves show visibly distinct spatial properties. Some of the curves considered apparently are more and more folded as they grow. They illustrate the self-similarity that characterizes fractals. " A small portion of such curve has the appearance of the same curve in an earlier stage of the evolution. For illustration, we selected the Koch curve, the Hubert curve, the Sierpinski curve and a portion of another Sierpinski curve, and the Dragon curve. These are compared to a spiral, a double spiral, and a worm-curve. 

These experiments gave direct evidence of an explosive chain reaction. They gave an energy production of up to twenty million watts, with a temperature rise in the hydride up to 2 C per millisecond. The strongest burst obtained produced 10 neutrons. The dragon is of historical importance. It was the first controlled nuclear reaction which was supercritical with prompt neutrons alone. 

The dragon of electronic correlation has been chased into the correlation hole. Numerical experience turns out to conclude (below an example will be given) that... 

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