[en] Searches for new particles at LEP and SLC performed by the ALEPH, DELPHI, L3, MARK-II and OPAL collaborations are reviewed. Signatures for production of new particles are discussed, and mass limits and experimental constraints on theories beyond the Standard Model are presented. (author)

[en] A gas sampling calorimeter with uranium absorbers was built and tested in a beam of pions and electrons of 1 to 6 GeV/c. As far as the detection of electromagnetic showers is concerned, no difference between uranium and a conventional absorber is found. The energy dependence of the resolution of the calorimeter for hadrons is given for 4.5 and 9 mm sampling. The measured π/e ratio is 0.83+-0.03. (orig.)

[en] Precise knowledge of the parameters of total ion stopping range and energy deposition is extremely important both for theoretical, and numerical proof of IFE target designs, and for the interpretation of beam-plasma interaction experiments, including current and future experiments at the SIS (GSI) and TWAC (ITEP). The results of the first experiments towards the development of high precision experimental methods to measure stopping ranges of heavy ions in solid matter conducted with the p⁺ beams at ITEP, VNIIEF and ⁵⁸Fe ion beam at GSI are presented. (authors)

[en] The transport of x-rays generated by laser or ion beams interacting with target walls or converters is one of the basic physical processes in indirect fusion targets. The reliability of target parameters prediction and their performance strongly depend on the validity of theoretical description of this process. The modeling of x-ray transport on 'Iskra-5' laser facility and numerical interpretation of the experimental results is in the focus of the research. The experimental and theoretical results on x-ray transport in cylindrical channels made from different materials are presented. (authors)

[en] The interaction of plasma clouds generated during laser irradiation of a spherical target in a background gas with a magnetic field was studied on the MKV-4 test bench of the Iskra-5 facility. The dynamics of the plasma cloud expansion in a 300- to 500-Oe magnetic field was investigated using magnetic and probe diagnostics. The results obtained are compared with calculations by different models of laser plasma diffusion in a magnetic field

No abstract available

[en] Complete text of publication follows. The unique combination of a Petawatt High-Energy Laser System for Ion beam eXperiments - 'Phelix' (Nd:glass, 1053 nm, 300-500 J, 1-15 ns) and intense heavy ion beams of the UNILAC accelerator at GSI-Darmstadt allow creating and probing of hot plasma with a density of some percentage of solid-state density. The experimental program aims at the investigation of fundamental features of heavy ion stopping in ionized matter in view of promising applications for the Heavy Ion Fusion and astrophysics. For combined experiments on the interaction of heavy ion beams with ionized matter (GSI) a high density plasma target with homogeneous in time (∼ 5 ns) and space (∼ 1 mm) plasma parameters in required. For these purposes we are developing the combined target which consists on the Gold hohlraum (converter) and low Z foam target heated by the hohlraum radiation before probed by an ion bunch. Foam targets are rather promising due to the effective conversion of the deposited radiation energy into the internal plasma energy and slow hydrodynamic response on the heating. Direct irradiation of the Gold converter walls with a nanosecond pulse delivered by the PHELIX-laser system (GSI) leads to hohlraum radiation spectra in the photon energy range of 50-500 eV. Expected temperatures of the foam targets heated by this radiation amount to 20-30 eV at electron densities of 10²¹ cm^-3. The results of the last hohlraum experiments carried out at PHELIX-laser energies of 200-250 J will be presented. In experiments the hohlraum radiation field, the conversion efficiency of the laser energy into soft X-rays, duration of the soft X-ray pulse, and parameters of the heated with X-rays foam targets have been measured. Acknowledgements. This work is supported by ISTC 2264 grant.

[en] The results of a simulation of the response of the L3 detector to hadrons is presented. The simulation is made on the basis of data obtained in the beam with the setup consisting of a uranium gas-sampling calorimeter with a bismuth germanium oxide calorimeter in front of it. (orig.)

[en] The performance of a uranium gas sampling hadron calorimeter is described. It has been observed that the hydrogen content of the gas mixture plays an important role in defining the behaviour of this type of calorimeter. The low-energy neutrons emerging from a hadron cascade are detected much more efficiently in a hydrogenous gas; thus leakage or containment of these neutrons becomes an important feature of the calorimeter setup. (orig.)

[en] Results are presented from studies of the interaction of two plasma clouds produced from two different-type laser targets in an ambient gas in the MKV-4 stand of the Iskra-5 facility. The experimental data are compared with the results of numerical simulations