[en] The results of mathematical simulation of ion motion in a cyclotron are presented. The possibility of phase focusing of ions with the electric field radial force is shown. The beam monochromatization is analyzed. 2 refs., 4 figs

[en] Problem linked with plotting of a comprehensive matrix of transition of the action gap of accelerator accelerating (decelerating) field is solved. Smooth quadratic variation of potential in a certain vicinity of a break point of linear model potential is introduced in this problem. 3 refs., 4 figs

[en] Experiments are conducted to investigate into the possibility of emission multipactoring regime-self-sustaining secondary emission in a magnetron gun with a cold cathode. Such regime is shown to enable to produce stable, homogeneous, intensive pulse beams of electrons with high duration and high frequency recycling. 4 refs., 3 figs

[en] Scaling relationships are presented as a basis for understanding the vacuum configurations of ECR ion sources. The suitable vacuum pumps as well as the pressure measuring gauges are shown. 1 ref., 2 figs

[en] The present state-of-the-art of development of DECRIS-14 multicharged ion source with 14.5 GHz pumping frequency and within ECR frequency range is presented. The results of preliminary tests of the source are given. 3 refs., 3 figs

[en] An efficient method for the direct and accurate computation and correction of linear and higher order chromaticities and parameter dependent tune shifts is presented. The method is based on the differential algebraic treatment of beam dynamics and requires no Lie algebraic or normal form methods, resulting in an appreciably more efficient algorithm. The method can be used for a direct correction of chromaticities and has been implemented in the design and simulation code COSY INFINITY and tested against the normal form approach as well as conventional numerical techniques. 19 refs., 2 tabs

[en] Mathematical model to optimize charged particle beam motion in linear accelerators is offered. Both geometrical dimensions of accelerating and focusing structures and various parameters of electromagnetic field may serve as varied parameters. 4 refs

[en] Discharge gas-plasma valve for arc-plasmatron type pulsed ion sources and for hydrogen negative ion sources is described. Rare-earth stable magnets (SaCo₅) are used in valve structure. Actuation time is equal to microsecond several hundreds. 3 refs., 1 fig

[en] Accelerator and beam characteristics relevant to the proton-therapy application are discussed. Performance and operation characteristics for the Loma Linda facility, as well as details of the plans, process and progress towards construction of the new facilities in Boston and Lacramento are presented. 10 refs.; 4 figs.; 1 tab

[en] Technique of stepped input of HF-power in unbalanced resonator immediately (in a few minutes) after intensification channel switch-off. was tested using the Moscow Meson Factory accelerator. 8 refs., 3 figs., 1 tab