Персона: Федотов, Александр Михайлович
Загружается...
Email Address
Birth Date
Научные группы
Организационные подразделения
Организационная единица
Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
Статус
Фамилия
Федотов
Имя
Александр Михайлович
Имя
6 results
Результаты поиска
Теперь показываю 1 - 6 из 6
- ПубликацияТолько метаданныеRadiation induced acceleration of ions in a laser irradiated transparent foil(2021) Gelfer, E. G.; Fedotov, A. M.; Weber, S.; Федотов, Александр МихайловичRadiation friction can have a substantial impact on electron dynamics in a transparent target exposed to a strong laser pulse. In particular, by modifying quiver electron motion, it can strongly enhance the longitudinal charge separation field, thus inducing ion acceleration. We present a model and simulation results for such a radiation induced ion acceleration regime and study the scalings of the maximal attainable and average ion energies with respect to the laser and target parameters. We also compare the performance of this mechanism to the conventional ones.
- ПубликацияТолько метаданныеOnset of electron-seeded cascades in generic electromagnetic fields(2021) Gelfer, E. G.; Mironov, A. A.; Fedotov, A. M.; Федотов, Александр Михайлович© 2021 American Physical SocietyQED cascades in a strong electromagnetic field of optical range and arbitrary configuration are considered. A general expression for short-time dependence of the key electron quantum dynamical parameter is derived, allowing one to generalize the effective threshold condition of QED cascade onset. The generalized theory is applied to self-sustained cascades in a single focused laser pulse. According to numerical simulations, if a GeV electron bunch is used as a seed, an ordinary cascade can be converted into a self-sustained one. As an application, it would be also possible to produce this way bright collimated photon beams with up to GeV photon energies.
- ПубликацияТолько метаданныеNonlinear Compton scattering in time-dependent electric fields beyond the locally constant crossed field approximation(2022) Gelfer, E. G.; Fedotov, A. M.; Mironov, A. A.; Weber, S.; Федотов, Александр Михайлович
- ПубликацияТолько метаданныеCoherent radiation of an electron bunch colliding with an intense laser pulse(2024) Gelfer, E. G.; Fedotov, A. M.; Klimo, O.; Weber, S.; Федотов, Александр Михайлович
- ПубликацияТолько метаданныеAbsorption and opacity threshold for a thin foil in a strong circularly polarized laser field(2020) Gelfer, E. G.; Fedotov, A. M.; Klimo, O.; Weber, S.; Федотов, Александр МихайловичWe show that a commonly accepted transparency threshold for a thin foil in a strong circularly polarized normally incident laser pulse needs a refinement. We present an analytical model that correctly accounts for laser absorption. The refined threshold is determined not solely by the laser amplitude, but by other parameters that are equally or even more important. Our predictions are in perfect agreement with particle-in-cell simulations. The refined criterion is crucial for configuring laser plasma experiments in the high-field domain. In addition, an opaque foil steepens the pulse front, which can be important for numerous applications.
- ПубликацияОткрытый доступCollective coherent emission of electrons in strong laser fields and perspective for hard x-ray lasers(2024) Gelfer, E. G.; Fedotov, A. M.; Klimo, O.; Weber, S.; Федотов, Александр МихайловичCoherent motion of particles in a plasma can imprint itself on radiation. The recent advent of high-power lasersў??allowing the nonlinear inverse Compton-scattering regime to be reachedў??has opened the possibility of looking at collective effects in laserў??plasma interactions. Under certain conditions, the collective interaction of many electrons with a laser pulse can generate coherent radiation in the hard x-ray regime. This perspective paper explains the limitations under which such a regime might be attained.