[en] Coincidence of wave lengths of nitrogen laser basing lines and resonance transitions in titanium atom is investigated. It is shown that resonance fluorescence excited by nitrogen laser can be used for absolute titanium atom density measurements. Experiments on titanium atom detection in a vapour cloud formed under irradiation of a titanium target in vacuum by dye laser pulse, are conducted. Fluorescence extinguishing is observed under high evaporation power

[en] A generator of microsecond relativistic electron beam, developed for experiments on dense plasma heating in solenoids, is described. The generator comprises a capacitor (1.2 MW; 0.5 μF) and a cascade voltage multiplier

[en] The experimental results on heating of a dense plasma by electron beam (1 MeV, 40 kA, 4μs) on the GOL-3 device are presented. The relativistic electron beam is injected into a 7-meter long plasma column of a mirror machine). The beam deposits about 20-30% of its energy into 'hot' (1-10 keV) plasma electrons in the homogeneous part of plasma (n - 10¹⁵ cm^-3, T∼ 1 keV). These electrons are slowed down in a 0.5-3 meter long gas cloud of a density of 10¹⁶-10¹⁷ cm^-3 (so-called two-stage heating scheme). The 'hot' electrons ionize the cloud, create a plasma which is heated due to binary collisions. The resulting total energy of the cloud is 2-4 times greater than the instantaneous energy content of the lower density homogeneous plasma. The shock waves were observed in the plasma. Temperature distribution along the plasma cloud was measured and was used to estimate the average energy of 'hot' electrons. The experiment demonstrates a high efficiency of the two-stage scheme of a dense plasma heating. 38 refs.; 28 figs

[en] Experimental results on a 10¹⁵cm^-3 plasma heating by a microsecond electron beam at the GOL-3 device are presented. The beam of 100 kJ energy content was injected in the hydrogen plasma placed inside a 7-m-long solenoid with 5.5 T magnetic field. The experiments were emphasized on the studies of the bulk plasma heating by means of laser scattering technique and on the beam energy spectrum analysis after its passing the plasma. The decay of the plasma temperature after the beam injection and is discussed. 19 refs.; 16 figs

[en] Analyzer of magnetized REB instant energy spectrum is described. The analyzer operation principle is based on the application of a sharp change of the direction of force lines of a magnetic field which is non-adiabatic for the beam electrons. The analyzer design is described, the main factors effecting the energy resolution are considered. The analyzer serviceability is examined in the course of experiments on plasma heating using a heavy-current microsecond REB at the GOL-3 device. The analyzer energy resolution which does not exceed 10% at 0.8 MeV energy and 20% at 0.3 MeV is determined. Beam energy spectra are obtained in one of the regimes of beam interaction with plasma. The efficiency of beam interaction with plasma determined using the analyzer achieves 30%. 10 refs.; 7 figs

[en] Characteristics of high-current relativistic electron beams injected to plasma from the end of pulsed open traps over the force line of the magnetic field are investigated. The shaped beam has belt configuration, then it is transformed to cylindrical one. An electrostatical accelerator is beam generator of microsecond duration. A beam with 5 μs pulse duration, 750 keV electron energy, 60 kJ power supply, 40 kA current and 200 A/cm² density was obtained in the experiment. 20-fold magnetic compression with total power supply of 50 kJ and 3 kA/cm² current density was obtained in experiments on beam compression

[en] Intense microsecond high-current relativistic electron beams (REB) are considered for solution of the problem of controlled thermonuclear fusion. Experiments are described where microsecond REB of high-current density of up to 5 kA/cm² and 100 kJ energy is produced. The beam was generated in the diode with graphite cathode 21.5 cm in diameter. The distance between cathodes and anode foil α was equal to 9 cm. 10 μm lavsan film with two-sided aluminium coating was used as anode foil. Beam compression was performed by magnetic field of a magnetic mirror configuration (0.5 T on anode foil and 10 T in the magnetic mirror inside the coil)

[en] Results of experiments on measuring angular spread of microsecond REB by U-1 unit are presented. Measurements of beam spread were performed at anode output directly and after passing compression system by the beam. Presented results of measuring electron angular spread show, that its characteristic value behind lavsan anode foil of 10 μm thickness in the absence of beam compression system equals 6±1.5 deg. This angular spread is practically preserved during beam transport through compression system with M=20 plug ratio angular spread in the region of the maximal compression equals Θ=27±7 deg in this case. Conditions, under which the noticeable decrease of angular beam spread is observed, may occur in the diode at low pressure in compression chamber (p=10^-3-10^-4 torr)

[en] Diagnostics are described of the GOL-3 device intended for studying plasma heating by a microsecond relativistic electron beam. The plasma typical parameters are the next: density of 10¹⁴-10¹⁷ cm^-3, temperature of 1-1000 eV, life time from units to tens of microsecond. Beam parameters before and after interaction with plasma are measured too

[en] New results on microsecond electron beam generation on the U-3 accelerator for plasma heating experiments at the GOL-3 device are presented. The electron beam is generated in the vacuum diode and the plasma filled diode and 20-fold focused in a mirror magnetic field. The energy spectrum of beam electrons was measured by magnetic analyzer and the broadening of spectrum width was observed in the experiments on dense (n ∼ 5x10¹⁵ cm^-3) plasma heating. The annular structure of the beam in the beginning of pulse was detected and possible reasons are discussed. First results of experiments on beam generation in the plasma filled diode are presented