[en] Dynamic recovery in molybdenum during uniaxial tension in 20-1200 deg C range at four deformation rates was investigated from the viewpoint of the theory of multistage strain hardening of polycrystal BCC-metals. Method of s-n diagram processing in S-e^1/2 coordinates (where S and e - real stress and strain) based on the phenomenon of successive stepwise rearrangement of dislocation structure during deformation, enebles to determine parameters of dynamic recovery stage - critical strain of its beginning e₃ and coefficient of strain hardening K₄. Model of dynamic recovery, where annihilation of screw dislocations of the opposite sign within the boundaries of dislocation cells is the decisive one, is suggested; the model enables to obtain analytical expressions of e₃ and K₄ parameters and explain the experimental data

[en] Contactless sensors for an accelerator beam using ionization of the residual gas are discussed. They produce rapid measurements of the beam profile, position of the center of mass and displacement, and estimates of the average density distribution over the beam section. An ionization sensor which can display the accelerator beam's cross section in real time on a monitor as well as the pulsed and averaged beam current is described. The cross-sectional sensitivity is ∼ 10 nA, the resolution of the visual control is under 1 mm, the controlled area dimensions are 40 x 40 mm. The sensor's performance in different accelerators is described

[en] The gauge for remote monitoring of the density distribution of accelerated particles' beam over cross section is based on the analysis spatial distribution of residual gas ionization products. With the transverse homogeneous electric field the released charges are transported through narrow slot behind which they are analyzed over energy with the electric field. Then they are registered by the open electron-optical converter with micro-channel-plate amplifier. The image of the beam distribution over cross section from the electron-optical converter screen is read out by TV-camera for representation on monitor. The detector was tested on cyclotrons at IAE (Moscow), INP (Kiev) and INP (Prague). The threshold sensitivity on the proton beam with the energy 30 MeV 10^-8 A

[en] An ionizing detector for on-line registration and representation of the geometric SR beam parameters was developed in RRC KI. The detector analyses the products of the residual gas ionization, which was done by the investigated beam. Special electrostatic optics and open image converter tube (ICT) form optical image of the real beam on the screen of ICT. The detector was checked on SR beams of the next storage rings: DCI (LURE, Orsey, France), KSRS (RRC KI, Moscow, Russia) and MAX-2 (MAX-lab, Lund, Sweden). The codes for TV image processing give a possibility for numeric estimation of the beam size, the width of its horizontal and vertical profiles and position of the beam gravity. Statistic processing of the beam gravity center using big amount of TV frames gives uncertainty in the beam position of about 2 μm while the width of the beam is about 2 mm. Summation of big amount of TV frames was used. This method significantly increases signal-to-noise ratio