Word: electronic
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Dates: during 1960-1969
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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...
...electron, with its opposing electrical field, does not react nearly so strongly with protons. It can pass near, or even through a proton and be scattered away without violently disturbing the proton itself. For this reason, the electron is a useful probe for examining the internal structure of the proton...
First on the experimental agenda at the Cambridge accelerator is an attempt to ascertain the internal structure of the proton. The experiment may take four years, and will require 1.5 million dollars of equipment. It is for this kind of work that the electron accelerator was expressly designed...
...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...
...Like the electron-proton scattering experiment, the bubble chamber program will require over a million dollars worth of equipment, and several years to complete...