Superradiant Smith-Purcell radiation (S-SPR) is a kind of free electron radiation with a train of free electron bunches ...

Atomic clocks are the basis upon which a second is defined. But there is a new kid on the block, the optical clock, which boasts even higher accuracy. Is it time to redefine the second?

When an electron is ejected from a metal surface it has kinetic energy. The amount of kinetic energy the electron has depends on the difference between the energy of the photon and the work ...

THERYQ is developing a radiotherapy system that uses very high-energy electrons to treat deep-seated tumours, and can also ...

Laser-plasma accelerators can accelerate particles over distances that are up to 1,000 times shorter than those required by ...

This means that each electron transition will produce a photon of a different frequency and hence a different colour. This causes line emission spectra to be produced, as shown below. This is not ...

However, such accelerators are massive and considerably expensive. To overcome these limitations, scientists have been ...

Free electron lasers have unique advantages of high power, wide frequency tunablility and et al, however, they face challenge ...