Cherenkov Radiation from Short Relativistic Bunches: General Approach

Introduction to Impedance For Short Relativistic Bunches ?

We will consider the cavity shown in Fig. (2.1) which has rotational symmetry about the z axis and is excited by the beam current, IB, passing through the gap. For the time being, we will consider only one mode of excitation for the cavity; namely, the mode where the magnetic field ~ B is azimuthal around the beam direction as shown. The current IL flows in the outer cavity wall in the directio...

Quantum effects in radiation on short bunches

The radiation caused by particles of one bunch in the collective electromagnetic field of the short oncoming bunch is studied. Quantum effects are calculated for the spectrum of radiated photons. Using this spectrum, the dependence of the relative energy loss δ on a quantum parameter κ is dicussed. It is shown that the behaviour of δ changes considerably with the increase of that parameter. In ...

Terahertz radiation from laser accelerated electron bunches

Coherent terahertz and millimeter wave radiation from laser accelerated electron bunches has been measured. The bunches were produced by tightly focusing ~spot diameter '6 mm) a high peak power ~up to 10 TW!, ultra-short (>50 fs) laser pulse from a high repetition rate ~10 Hz! laser system ~0.8 mm!, onto a high density (.10 cm) pulsed gas jet of length '1.5 mm. As the electrons exit the plasma,...

Cherenkov radiation from relativistic heavy ions taking account of their slowing down in radiator

High power Cherenkov radiation from a relativistic particle rotating around a dielectric ball

Some characteristic features in the radiation from a relativistic electron uniformly rotating along an equatorial orbit around a dielectric ball have been studied. It was shown that at some harmonics, in case of weak absorption of radiation in the ball material, the electron may generate radiation field quanta exceeding in several dozens of times those generated by electron rotating in a contin...