Motion of Intense Beams in Toroidal Fields

Intense relativistic electron beams were propagated around a 180° toroidal sector to study beam dynamics in toroidal fields. The major drift was along $-\overrightarrow{\mathrm{R}}\times \overrightarrow{\mathrm{B}}$ and no $\overrightarrow{\mathrm{E}}\times \overrightarrow{\mathrm{B}}$ drift was observed, in contrast to the case of plasma in toroidal fields. Based on these observations, a method of injection of electron beams into toroidal fields is proposed.