[en] The invention is classified as an ion accelerator and may be used to obtain 100 and above degree of slowing-down. The invention is aimed at decreasing high-frequency losses in accelerator. In accelerator this aim is fulfilled by dividing each half-wave vibrator in the place of its attachment to resonator cavity into two quater-wave-length spiral vibrators, and vibrator attachment points are lengthwise displaced about each other within l distance: l is determined from 0< l<λ/4, where λ is generator wave length. In the above accelerating system tunning to operating frequency is simplified as vibrator length may be varied by diplacing the spiral attaching point in resonator cavity. Therewith the spiral radius, position of longitudinal electrodes and drift tubes are unchanged, and realignment is not necessary. The given structure may have less cross-section dimensions, resonance frequency being equal

[en] Short communication. 4 refs

[en] NdGaO₃ substrates with 0.5 mm thickness, on which YBa₂Cu₃O_7-x film with ∼ 0.1 μm thickness is formed by pulse laser spray-coating and above it - ∼ 0.3 μm thickness gold film formed by magnetron spray-coating, are used. Then a bow-type antenna and microbolometer are sequentially produced using photolithograpy. Temperature dependences of R, noise stress S_v^1/2 and V/W-sensitivity r; noise spectra in 10-10⁶ Hz frequency range, thermal less coefficient G and microbolometer time constant τ are measured. 9 refs., 3 figs

[en] GdBaCuO superconducting bolometer on the basis of the temperature dependence of magnetic screening of a HTSC film is described. It is shown the principal possibility of development of very sensitive HTSC bolometers based on the magnetic susceptibility

[en] Parameters of antenna-coupled superconducting microbolometers in far-infrared and submillimeter wavelength regions are considered under the condition of their limitation by background fluctuations. Theoretical analysis shows that at cryogenic temperatures application of antenna reception leads to sharp decrease of response time τ of bolometers without any decrease in their detectivity. Calculated characteristics of deep-cooled antenna-coupled microbolometers are being compared with measured parameters of Au/Pb/Sn and YBaCuO microbolometers, operating at 3.6-4.7 K and 70-90 K, respectively. (orig.)

No abstract available

[en] An accelerating structure for acceleration of ribbon ion beam in a linear undulator accelerator (lineondutron) is suggested. The transverse and phase stability conditions are given. The accelerating cavity contains a RF-system, combined with the plane electrostatic undulator. The RF-system consists of two oscillating systems, dc-isolated between each other. The experimentally measured RF-field distributions, a method of RF-tuning are given. The designed specifications of a proton accelerator project with an output energy of 1 MeV are presented. (author) 2 refs.; 3 figs

[en] Characteristics of spiral accelerating systems with equipotential longitudinal electrodes are studied on models. The considered accelerating system consists of a cylinder formed by flanges and two housing halfs and the resonance system itself. The resonance system consists of two longitudinal electrodes, to which drift tubes and semiwave vibrators, uniformly arranged along the whole accelerating system, are attached in turn. The vibrator ends are attached to longitudinal electrodes, on which a high frequency potential used for particle acceleration is generated. Vibrators are accomplished in a form of spirals with electrodes positioned both outside the spiral and inside it. Structures with stepped and smooth increase of voltage on longitudinal electrodes are studied. Dependences of a ratio of shunt resistance and Q-factor on relative particle velocity and also of resonance frequency andQ-factor on vibrator number are obtained. A conclusion is drawn that the described spiral accelerating system and its modification present a wide choice for designing low-energy ion accelerators

[en] Short communication

[en] The catalytic activity of complexes of molybdenum - derivatives of Mo(CO)₆, containing triphenylphosphine, -arsine, and -stilbine ligands - in the epoxidation of propylene by isopropylbenzene was studied. It was shown that the activity and selectivity of molybdenum complexes depends on the nature of the ligand surroundings of the molybdenum atom