Powerful electron and beams of nanosecond and microsecond length produced by diode electron guns with explosion- and self-emission cathodes are widely used in high-density energy physics. Analytical and experimental investigations of the relativistic electron beam propagation in a heavy gas mixture are presented in this paper.
I have investigated analytical simulation of the possibility of application super-strong, ultrafast laser radiation for nucleosynthesis of 26Al, 26Alm (Al-Mg-cycle) in cosmic regolith using products of the reaction 3He(d,p)4He, and other light accelerated charged particles. It may be laser propulsion with annihilation of cosmic propillents a matter.
The results of experimental investigation of factors which restrict the gas lifetime in pulsed discharge and electron beam pumped ArF and KrF for micromachining, medicine, and short-pulse excimer lasers have been presented. The correlation in between gas mixture lifetime and constant rate of fluorine concentration decrease has been observed. It has been determined that the main canal of fluorine concentration decrease is the reaction of formation of metal fluorides of electrodes. Compositions of gas phase impurities of laser mixture which are formed during the laser operating and their influence on the characteristics of laser emission have been ascertained. An absence of appreciable influence of absorption and scattering of laser emission by impurities has been revealed. The mechanism of influence of solid-state impurities on lasing energy has been suggested.
Results of experiments on gas-laser cutting of composition glasses three ply using emission of an electric discharge close circuit subsonic CO laser are presented. The parameters of the experimental arrangement are given. It is shown that satisfactory results for division of three ply glass with thickness about 7 mm are obtained when the rate of stretching is 2 m/min and output power is 400 W.
Results of experiments on gas-laser cutting of composition glasses three ply using emission of an electric discharge close circuit subsonic CO laser are presented. The parameters of the experimental arrangement are given. It is shown that satisfactory results for division of three ply glass with thickness about 7 mm are obtained when the rate of stretching is 2 m/min and output power is 400 W. Cw supersonic e-beam sustained CO laser (SS CO EIL) was shown to be the most effective and compact among all high power lasers. Experimental testing proved that we have in possession the technical solution enabling to construct technological supersonic e-beam sustained cw closed-cycle CO laser with the power of several hundred kilowatts and wall plug efficiency being more than 20% (power supply from AC-net and water cooling).
The results of experimental investigation of factors which restrict the gas lifetime in pulsed discharge KrF laser have been presented. The correlation in between gas mixture lifetime and constant rate of fluorine concentration decrease has been observed. It has been determined that the main canal of fluorine concentration decrease is the reaction of formation of metal fluorides of electrodes. Compositions of gas phase impurities of laser mixture which are formed during the laser operating and their influence on the characteristics of laser emission have been ascertained. An absence of appreciable influence of absorption and scattering of laser emission by impurities has been revealed. The mechanism of influence of solid-state impurities on lasing energy has been suggested.
The review of known methods of application excimer lasers in the stomatology is presented and the results of investigation of possibility of KrF laser application in the stomatology are given. The versions of construction of medical stomatologic laser which includes the different types of gasifiers and purifiers are presented.
To study parameters of the diode electron gun with the current 80 - 100 kA (current density equals 1000 A/cm2), voltage 0,5 MeV, and pulse length 40 - 80 ns varied cathode materials was undertaken. Vacuum diode cathodes made of stainless steel, carbonic composite material and isotropic pyrographite are active in well-known explosion-emission regime. The cathode made of high-density pyrographite is active during all pulse-time in self-emission regime due to microspaces cooling with material anisotropic thermal and electrical conductivity.
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