Word: beaming
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
Technicians speak of an electron "beam," but it is incorrect to think off the machine as producing a continuous flow of high-energy electrons. In reality, the electrons spurt into the ring from the linear accelerator in bunches of 100 million at the rate of 60 bunches per second. At 16 places in the ring, there are radio-frequency powered acceleration cavities. Each time the electron bunch passes through a cavity, its energy increases. The electron pulses thus receive discrete "kicks" of energy as they orbit, until they have finally reached the energy level desired for any particular experiment...
...actual experimentation, the electron beam will be aimed at a protonrich liquid hydrogen target. The electrons will be scattered as they emerge from the target. Scientists hope that close study of the scattering pattern may yield clues to the internal composition of the proton, which is no longer considered an indivisible particle but rather a composite of smaller bodies...
...this second experiment the beam will be used to create, through bombardment of a special target, a stream of high energy photons. The photons, in turn, will be directed into a hydrogen bubble chamber. Interaction of the photons with the hydrogen nuclei will produce strange particles. These particles will leave a track of bubbles in the hydrogen, and in this way can be observed and studied...
...onetime Assistant Secretary of Defense who is now head of her own public relations firm; both for the second time; in Manhattan. Some 50 old friends, among them Bernard Baruch, were on hand at All Souls Unitarian Church to hear the trembling bride repeat her vows and Hoffman beam: "At least 200 people have told me how wonderful Anna is, and anyone who wants to say how wonderful she is can say it again. I love to hear...
...team that laid out the momentous experiment was led by Columbia Professors Leon Lederman, Melvin Schwartz and Jack Steinberger, and helped by Brookhaven scientists in charge of the synchrotron. First step was to shoot the machine's high-energy protons at a beryllium target and produce an intense beam of pions-which decay rapidly into muons, neutrinos (perhaps the new type), and other nuclear odds and ends. After shooting across some 70 ft., this beam of mixed particles hit a shield of battleship armor 42 ft. thick that stopped everything but the neutrinos, which sailed on unheeding...