Some engineering problems of the proton synchrotron Nimrod

In 1919, ¿ particles of energy 5 MeV from radium were used for bombardinig the atom; over the past 40 years, development of artificial sources has been rapid, and now giant accelerators are capable of producing particles several thousand times more energetic than those first used by Rutherford. This article, based on the 7th Hunter memorial lecture, describes the engineering of one such machine.