Dielectric wakefield researches

Excitation of wakefields in cylindrical dielectric waveguide/resonator by a sequence of relativistic electron bunches was investigated using an electron linac «Almaz-2» (4.5 МeV, 6·10³ bunches of duration 60 ps and charge 0.32 nC each). Energy spectrum of electrons, radial topography and longitudinal distribution of wakefield, and total energy of excited wakefield were measured by means of magnetic analyzer, high frequency probe, and a sensitive calorimeter.Исследовано возбуждение кильватерных полей в цилиндрическом диэлектрическом волноводе/резонаторе последовательностью релятивистских электронных сгустков на линейном электронном ускорителе «Алмаз-2» (4.5 МэВ, 6•10³ сгустков длительностью 60 пс и зарядом 0.32 нКл каждый). Измерены энергетические спектры электронов, радиальная топография и продольное распределение кильватерного поля и его энергия с помощью магнитного анализатора, ВЧ-зондов и чувствительного калориметра.Досліджено збудження кільватерних полів у циліндричному діелектричному хвилеводі/резонаторі регулярною послідовністю релятивістських електронних згустків на лінійному електронному прискорювачі «Алмаз-2» (4.5 МеВ, 6·10³ згустків тривалістю 60 пс і зарядом 0.32 нКл кожний). Виміряні енергетичні спектри електронів, радіальна топографія та поздовжній розподіл кільватерного поля та його енергія за допомогою магнітного аналізатора, ВЧ-зондів і чутливого калориметра

Experimental Evidence of Giant Electron - Gamma Bursts Generated by Extensive Atmospheric Showers in Thunderclouds

The existence of a new phenomena - giant electron-gamma bursts is established. The bursts are generated in thunderclouds as a result of the combined action of runaway breakdown and extensive atmosphere showers (RB-EAS). The experiments were fulfilled at the Tien Shan Mountain Scientific Station using EAS-Radio installation. This specially constructed installation consists of a wide spread EAS trigger array and a high time resolution radiointerferometer.Comment: 30 pages, 16 figure

The Muonium Atom as a Probe of Physics beyond the Standard Model

The observed interactions between particles are not fully explained in the successful theoretical description of the standard model to date. Due to the close confinement of the bound state muonium ($M = \mu^+ e^-$) can be used as an ideal probe of quantum electrodynamics and weak interaction and also for a search for additional interactions between leptons. Of special interest is the lepton number violating process of sponteanous conversion of muonium to antimuonium.Comment: 15 pages,6 figure

Differential Cross Section of DP-Elastic Scattering at Intermediate Energies

The deuteron-proton elastic scattering is studied in the multiple scattering expansion formalism. The contributions of the one-nucleon-exchange, single- and double scattering are taken into account. The Love and Franey parameterization of the nucleon-nucleon $t$-matrix is used, that gives an opportunity to include the off-energy-shell effects into calculations. Differential cross sections are considered at four energies, $T_d=390, 500, 880, 1200$ MeV. The obtained results are compared with the experimental data