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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:34 |
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Conference: Bucharest University Faculty of Physics 2009 Meeting
Section: Nuclear and Elementary Particles Physics
Title:
Some aspects on phase and group velocities in Cerenkov radiation and their importance for high energy physics experiments
Authors:
Madalina Badea, Ionel Lazanu
Affiliation:
University of Bucharest, Faculty of Physics, POBox MG-11, Bucharest-Magurele, Romania
E-mail
badea.madalina2@gmail.com; ionel.lazanu@g.unibuc.ro
Keywords:
Cerenkov radiation, group velocity, phase velocity
Abstract:
Emission of Cerenkov radiation represents a phenomenon used in detector systems, in very wide types of applications: high energy physics, nuclear physics, astroparticles, high energy neutrino, or gamma-ray astronomy. At the present time, this phenomenon is supposed to exist in strong interactions and gravity as well.
Some peculiarities of the electromagnetic Cherenkov radiation, very important in HEP experiments are not always completely considered and could conduct to mistaken interpretations. In this communication, the role of phase and group velocities is revised and discussed for media with different dispersive and symmetry properties. The energy distribution of the electric field of the emitted radiation is analysed and the essential role of group velocity is put into evidence. For possible practical applications, these aspects are analysed for some transparent media to Cerenkov radiation: water, ice, noble gases (in liquid and solid phases) and alkali.
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