As known channeling of electrons in crystals can be observed for the beam energies starting from several MeV and is observable up to hudred GeV energies. Applying the same phenomenology of channeling physics for description of various behaviors of beam motion in crystals we simplify solution of many tasks that typically are split between high-energy and low-energy physics.
This report...
The spectral intensity of gamma radiation generated by 855 MeV electrons under the conditions of channeling and volume reflection in silicon and germanium bent crystals was measured at the Mainz Mikrotron MAMI. Both crystals were 15 µm thick and bent along (111) crystal planes. Both crystals were mounted on piezo activated dynamical holder, which allowed us to change the crystal curvature...
If a high-energy charged particle penetrates through a crystal having a small angle between its momentum and one of the main atomic axes, correlations between successive collisions of the particle with neighboring atoms may occur. Because of periodic arrangement in the location of atomic strings in crystal such orientational effect as planar channeling is possible. When high-energy charged...
Nikolay P. Kalashnikov (kalash@mephi.ru), Andrey S. Olchak (asolchak@mephi.ru)
National Research Nuclear University MEPhI
(Moscow Engineering Physics Institute).
115409 Moscow, Kashirskoye Shosse, 31, Russia
Abstract
The photorecombination process of the axial channeling high-energy electrons is considered. The photorecombination...
The motion of charged particles in a crystal during axial channeling can be both regular and chaotic [1]. The chaos in quantum case manifests itself in the statistical properties of the energy level set. These properties had been studied in [2] for the electrons channeling along [110] direction of the silicon crystal, in the case when the classical motion is completely chaotic. The case of...
Conventional positron sources are based on the conversion of bremsstrahlung from relativistic electrons into electron-positron pairs.
Reasonably effective approach for a positron source known as a “hybrid” solution [1, 2] is using a multi-GeV electron beam for production of channeling radiation (CR) in a crystalline target (radiator) with its subsequent conversion into electron-positron pairs...
