Miniaturized information storage will be a boon to such establishments as libraries who have to store great number of bulky books, newspapers and reports. At present, the British Museum adds an estimated 8 miles (13 km) of books to its library shelves every year.
Scientists at Cavendish laboratory, Cambridge, are used an electron beam to generate patterns of dots to form both microscopic pictures and lettering in aluminium fluoride. In this way they can reduce printed words to a density of 10 million words per square millimetre.
Since the beginning of electron-beam welding on an industrial scale at the end of the 1950s, countless electron-beam welders have been designed and are being used worldwide. These welders feature working vacuum chambers ranging from a few liters up to hundreds of cubic meters, with electron guns carrying power of up to 100 kW.
An electron microscope uses a controlled beam of electrons to illuminate a specimen and produce a magnified image. Two common types are the scanning electron microscope (SEM) and the transmission electron microscope (TEM).
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