In this paper, the development of Terahertz multi-beam Back Wave Oscillator (BWO) is investigated. We use folded waveguide slow-wave structure combined with two planar alignment electron beams to ...

A double‑deck bus carrying Barton Peveril students veers off in Eastleigh and plunges into the Itchen. Driver and four teens hurt; all rescued.

Stadler and Austrian Federal Railways (ÖBB) have unveiled the new KISS double-deck trains to support long-distance travel on the Western railway between Vienna and Salzburg.

To evaluate the beam quality of an electron gun, beam waist, beam position, operating current, operating voltage, beam envelope, cross-section current distribution and cross-section macro particle ...