Kinetic theory of electron-cyclotron resonance masers withasymmetry of the electron beam in a cavity

On the basis of kinetic theory, general relations for the starting current and frequency shift in electron-cyclotron resonance masers are derived in the case of eccentricity of the electron beam in a cavity. The influence of a misalignment of the beam and cavity on the gyrotron operation is discussed as an example     

Compilation of coupling constants and low-energy parameters

The electron capture decay ${}^{163}\text{Ho}\text{→}{}^{163}\text{Dy}{}^{\mathrm{<mtext>H</mtext>}}\text{+ν}{}_{\mathrm{<mtext>e</mtext>}}$ occurs with a record low energy release, Q ～ 2.6 keV. The daughter Dy^H atom has an electron hole, H, and predominantly decays by electron ejection Dy^H→Dy^H₁H₂+e^?. We investigate the neutrino mass sensitivity of the electron spectrum in the overall process Ho→Dy^H₁H₂+e^?+ν_e. In this spectrum, the fraction of events sensitive to a fixed non-zero neutrino mass in one to two orders of magnitude smaller than in the standard case of tritium β decay. But the electron energies in ¹⁶³Ho decay are considerably smaller than in ³H decay (Q ～ 18 keV). This suggests experiments whose energy resolution could be much better than that of the magnetic spectrometers conventionally used in the tritium case.     

Analytic representation for form factors and determination of radii of hadrons and light nuclei

A simple exponential form with correct analytic properties is proposed for form factors. Its implications for the determination of radii of particles are discussed.     

Present status of the experimental testing of the forward K+-p and pp, ¯pp dispersion relations

A brief survey of the present status of the experimental testing of the forward K^+-p and pp, pp dispersion relations is given. Some general questions concerning the experimental determination of the real part of the forward scattering amplitude are concerned. Recently developed forms of dispersion relations and of their substitutes are discussed.Presented by O.Dumbrajs at the Symposium on Hadron-Hadron Scattering at High Energies, Liblice, Czechoslovakia, June 16–21, 1975.On leave of absence from theInstitute of Nuclear Physics, Moscow State University, USSR We express our gratitude to the Organizing Committee of Symposium on Hadron Scattering at High Energies in Liblice, in particular to Prof. J.Fischer, for the oportunity to give this talk.We benefited very much from the creative atmosphere of the Symposium and from discussions, especially with Prof. G.Höhler.One of us (O.D.) acknowledges with gratitude the kind hospitality of the Warsaw University where these notes have been prepared.     

The description of inclusive characteristics in\bar pp interactions at 22.4 GeV/c in terms of the quark-parton model

We compare the inclusive characteristics of \(\bar pp\) interactions at 22.4 GeV/c with quark-parton model predictions in terms of collective variables. The model qualitatively agrees with the data in contradiction to the simple cylindrical phase space and randomized charge model. The ways are proposed of a further development of the quark-parton model.     

Influence of reflections on mode competition in gyrotrons

A general theory is presented for studying the influence of reflections on mode competition in gyrotrons. Strong effect is found in the illustrative example: the coaxial cavity TE_28,16 gyrotron operating close to the optimal point in the general parameter spare. In some cases, the fixed-field approximation and the self-consistent approach lead to qualitatively different predictions, which emphasizes the need for self-consistent calculations in the final stage of design of a gyrotron     

Pion Coupling to Nuclei

The concept of the pion-nucleus coupling constants is discussed. Methods of their determination are reviewed. These include: forward dispersion relations, extrapolation of differential cross sections to the poles in the angular variable, analysis of data on electromagnetic form factors with the use of the PCAC and CVC hypotheses, pion photoproduction at threshold and low-ernergy theorems. Our present knowledge of the pion coupling to the He, Li, Be, C, N and O nuclei is summarized.     

Possible operation of the KfK gyrotron at harmonics

Expected efficiencies for the possible operation of the KfK gyrotron at the first, second and third harmonics are estimated. The results obtained in the cold cavity approximation and in self-consistent calculations are compared. Mode competition between the modes operating at the fundamental and at the second harmonic is investigated. Regions of stable single-mode generation are established. Effect of the the magnetic field tapering on the mode competition is illustrated.     

Inclusive and semi-inclusive production of positive pions and protons in pp interactions at 22.4 GeV/c

New results on the inclusive and semi-inclusive production of π⁺ mesons and protons in the whole phase space are given for about 2.2 · 10⁴ inelastic $\text{p}\text{p}$ interactions at 22.4 GeV/c. A method of statistical separation for spectra of particles of the same charge which are produced in CP-symmetrical reactions is discussed in detail. Experimental data are compared with quark-parton model predictions.     

Model-independent analysis of the differential cross section for the reaction n+d→π0+t at medium energies

Experimental values of the differential cross section for the reactionn+d→π ⁰+t at large angles (θ?50°) in the neutron energy range 460–560 MeV and the known values of the coupling constants \(G_{nn\pi ^O }^2 \) andG _tdn ² are used to predictdσ/dΩ at smaller angles. The method is based on the use of general analytic properties of the differential cross section in the cosgq-plane.