Cuspoid Vavilov-Cherenkov Radiation and Its Application in High-Energy and Neutrino Physics
Ľuboš Krupa
Faculty of Science of Palacký University Olomouc; IEAP, CTU in Prague
Abstrakt: When studying the properties of the Vavilov-Cherenkov radiation (VChR) arising from the arbitrary motion of a charged particle in the transparent medium, using the catastrophe theory, the existence of a new type of radiation, the cuspoid VChR, was predicted. This radiation is a realisation of cuspoid catastrophes in electromagnetic radiation. The radiation can be generated at the non-constant motion of a charged particle in a transparent medium and is emitted at a very narrow solid angle. The radiation is more intensive than ordinary VChR and is generated only at specific angles, that depend uniquely on the particle's motion in the medium. For this reason, it could be used to measure particle parameters that determine the motion of a charged particle, such as momentum and charge. The momenta of charged particles are usually determined in magnetic spectrometers. The Lorentz force causes the particles to follow circular or helical trajectories around the direction of the magnetic field. The bending radius R of particle tracks is related to the magnetic field strength and the momentum component of the particle perpendicular to the magnetic field ptrans. With a suitably focusing optical system, this allows the reconstruction arc of a ring. In a focusing detector, the photons can be collected by a spherical mirror with focal length f and focused onto the photon detector placed at the focal plane. The result is an arc of the circle with a radius r, independent of the emission point along the particle's track. The main goal of this work is to study the cuspoid radiation emitted by a charge when it moves in a magnetic field and its application in high-energy physics and neutrino physics. If we use the ring-imaging detection technique, then we can measure the following parameters using cuspoid radiation: radius r of the arc of the ring (r is directly related to ptrans), deflection angle ψ, azimuthal angle φ, polar angle θ and the number of emitted photons Ncusp. With the help of these parameters, it is, in principle, also possible to determine the position of the vertex, the origin of particle track in the magnetic field. Cuspoid radiation could be an alternative for measuring the momentum of relativistic particles and improve the possibilities of their identification. In many cases, measuring only electromagnetic radiation (Cherenkov, cuspoid) will be sufficient to identify a charged particle. Due to the large penetrating power of muons in materials, the influence of multiple scattering on its trajectory in a transparent medium placed in a magnetic field can be neglected. Muon detection is an important aspect of neutrino physics and, therefore, in our opinion, measuring the muon momentum using the cuspoid radiation method can be of significant help in experiments aimed at investigating the properties of neutrino. The advantage is that the same Ring Imaging Cherenkov detectors used in neutrino experiments can be used to determine the muon momentum and thus their kinetic energy.
Seminář se koná v úterý 13. května ve 14:00
v zasedací místnosti ÚTEF ČVUT, Praha 1, Husova 240/5.
| Ing. Bartoloměj Biskup, Ph.D. tajemník semináře |
doc. Ing. Ivan Štekl, CSc. ředitel ÚTEF |
doc. Dr. André Sopczak předseda NPS, ČS IEEE |
NUCLEAR & PLASMA SCIENCES SOCIETY CHAPTER
IEEE Czechoslovakia section
https://www.ieee.cz/main/section/nps/