Word: electronics
(lookup in dictionary)
(lookup stats)
Dates: during 1960-1969
Sort By: most recent first
(reverse)
Backbone of Stanford's linear accelerator (called SLAC) is a 10,000-ft.-long, 4-in.-diameter copper tube housed in a concrete tunnel and buried 25 ft. underground to protect scientists and any bystanders from its fierce radiation. At one end, an electron beam is generated in much the same manner as the beam inside a home TV picture tube. Injected into a nickel-size hole that runs the length of the copper tube, the beam's electrons are immediately accelerated by 6,000,000-watt microwave pulses generated by 245 klystrons-giant, ultrahigh-frequency radio tubes...
...confusion, Kuppermann and Chemist John White have taken an impressive step toward making chemistry exact and predictable: they have made the first direct measurement of the minimum energy required to cause one of the simplest chemical reactions known to science. An absolute minimum of one-third of an electron volt is needed, they discovered, to split a hydrogen molecule into two hydrogen atoms and to combine one of them with a deuterium atom to form deuterium hydride. An addition of any less energy and the reaction will not occur...
...exposure provided the minimum energy needed to cause the reaction. They then determined the energy carried by a photon at that wave length and calculated how much of it had been imparted to the deuterium atom when the deuterium iodide molecule was split. Their result: one-third of an electron volt...
Another of the new ventures is the processing of experimental data while the experiment is still in progress. This is being tried on a high energy physics experiment at the Cambridge Electron Accelerator. Each of four CEA scientists has a small computer in his laboratory a little way up Oxford St., and these are tied in with the IBM 360/50 at the Center. The small machines gather data from the experiment, and pass it on to the larger computer where it is processed. The results are instantaneously fed back to the small machines to be displayed to the scientists...
...designs were attempts to produce the raw materials of the study -- the photographed tracks of thousands of collisions between two moving particles, an electron and an positron. Normal accelerator experiments send one particle into a stationary target...