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Seminario: "Various ways of making a relativistic electron radiate"

Giovedì 8 novembre alle ore 14:30 presso Aula B del Dipartimento di Fisica dell'Università di Trieste. Relatore: prof. Xavier Artru (Institut de Physique Nucléaire de Lyon & CNRS/IN2P3 and Université Lyon-1)

ABSTRACT:

A relativistic electron can emit photons in various ways :
- 1) being in nonuniform motion: synchrotron radiation, bremsstrahlung, channeling radiation, etc.
- 2) crossing and polarizing a material object: Cherenkov effect, transition radiation, parametric X-rays etc.
- 3) passing close to a material object: diffraction radiation, Smith-Purcell effect, etc.
No less than 12 ways can be listed. After writing a common basic formula, I will present the properties and applications of some of them. When possible I will use phenomenological concepts like the Equivalent Photon one. Finally I will speak of the less known phenomena of shadowing (or half-bare electron), photon impact parameter and "side-slipping" of the electron.

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