A betatron is a cyclic particle accelerator developed by Donald Kerst at the University of Illinois in 1940 to accelerate electrons, but the concepts ultimately originate from Rolf Widerøe, whose development of an induction accelerator failed due to the lack of transverse focusing. Previous development in Germany also occurred through Max Steenbe... Found on http://en.wikipedia.org/wiki/Betatron
a type of particle accelerator that uses the electric field induced by a varying magnetic field to accelerate electrons (beta particles) to high ... [3 related articles] Found on http://www.britannica.com/eb/a-z/b/57
A device used to accelerate electrons (beta particles) to energies of some ten MeV. The electrons run in an annular vacuum tube and are kept on this orbit by a magnetic field array. They are accelerated by electromagnetic induction (transformer principle). Found on http://www.daviddarling.info/encyclopedia/B/betatron.html
an electron accelerator in which the magnetic fields normal to the circular orbit of the electrons and within that orbit increase with time; the field at the orbit maintains a stable orbit while the changing magnetic field inside the orbit accelerates the electrons in the orbit Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=881-06-26
<radiobiology> A circular electron accelerator that is a source of either high energy electrons or X-rays. ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973
A betatron is an apparatus for accelerating electrons to very high velocities by means of a periodic magnetic field, thus producing 'artificial' beta rays. Found on http://www.probertencyclopaedia.com/browse/GB.HTM