[en] The automated system for electron and positron beam trajectory stabilization booster storage unit into the VEPP-4 storage track is described. The above system includes the transducers for the beam parameter taking off and processing and the control computer. Special attention is paid to the beam positron transducer structure, which is used as the image current transducer. The achieved accuracy of coordinate resolution for transducers within the 4-150 range at the VEPP-3 equals 0.25 mm. 4 refs

[en] Short communication

No abstract available

[en] The system for monitoring charged particles beams in transformation channels is described. The system is based on application of the secondary emission monitors (SEM). The devices for treatment of the SEM signals, switched on a special interface modulus in the CAMAC crate, are considered. The basic characteristics of the information acquisition system are presented. The connection system and crate controller are described. The system is applied in the VEPP-3 and VEPP-4 channels

No abstract available

[en] The Backward Scattered Compton Quanta light source (ROKK-1M) developed for the high intensity polarized and tagged gamma beam at the Novosibirsk VEPP-4M Collider is described. Energy calibration of the electron and positron beams, real-time measurement of the beam polarization, and the electron-positron beam emittance at the interaction point are discussed. (AIP) copyright 1995 American Institute of Physics

[en] We have started a new series of experiments on a precise measurement of J/Ψ-, Ψ'- mesons and τ-lepton masses at VEPP-4M collider with KEDR detector. Features of the method used for an absolute particle energy calibration based on the resonance depolarization are described

[en] Data analysis of an experiment in which photon splitting in atomic fields was observed is presented. The experiment was performed at the tagged photon beam of the ROKK-1M facility at the VEPP-4M collider. In the energy region of 120-450 MeV, statistics of 1.6x10⁹ photons incident on the BGO target was collected. About 400 candidate photon-splitting events were reconstructed. Within the attained experimental accuracy, the experimental results are consistent with the calculated exact atomic-field cross section. The predictions obtained in the Born approximation differ significantly from the experimental results

[en] Photofission cross sections of ²⁰⁹ Bi, ^nat Pb, ¹⁹⁷ Au, ^nat Pt, ^nat W, ¹⁸¹ Ta, ⁵¹ V, and ^nat Ti nuclei have been measured at an incident photon energy of 100 MeV using monochromatic photons produced by Compton backscattering at the ROKK-1M facility (BINP, Novosibirsk). Detection of fission fragments has been performed by means of Makrofol track-etch detectors in close contact with metallic foils of the target elements. The values of fissility at 100 MeV deduced for the targets under investigation are found to range between 10^-4 and 10^-2. The present results show consistency with the fissility trends calculated for 69- and 600-MeV monoenergetic photons using a formalism based on the current two-step model for intermediate-energy photofission reactions. (author). 39 refs., 4 figs., 3 tabs

[en] Quasi-monochromatic photon beams of 108-MeV Compton-edge energy produced in the ROKK-1M facility at the storage ring VEPP-4M (BINP, Novosibirsk) and makrofol sheets as fission track detectors have been used to measure the photofission yield of ²⁷ Al. The fission yield was found (160 ± 55) μb. From the present results and previously measured ²⁷ Al photofission yield at ∼ 79 MeV end-point energy with the LADON apparatus, the trends of fission cross section and fissility have been obtained in the incident photon energy range ∼ 40 - 110 MeV. the present results and data for other intermediate-mass nuclei obtained with the same methodology have indicated an increase of fissility with decreasing Z²/A as predicted by the liquid-drop model for fissioning systems lighter than ∼ Ag. (author)