An electron linear accelerator has been demonstrated that uses a slow transverse electromagnetic wave (TE wave, 10 kW) supplemented with a crossed static magnetic field. An initial energy gain of 6.0 keV for electrons is observed from an incident energy of 62 keV in a 0.5 m accelerator without an additional external magnetic field. When an external vertical magnetic field of 2.5 G is applied under the same conditions, an additional 7.5 keV energy gain is observed. The results show the feasibility of making a compact accelerator using TE mode electromagnetic waves.

• Received 7 June 1994

DOI:https://doi.org/10.1103/PhysRevLett.76.1635