GAS LASER Russian patent published in 1998 - IPC

FIELD: laser engineering. SUBSTANCE: gas laser has active element with electrodes, ceramic capillary discharge tube placed in cooling jacket accommodating solenoid arranged coaxially to capillary tube and made in the form of metal coil connected to power supply; novelty is that solenoid coil turns are made of rectangular-section wire are placed directly on capillary tube, turn-to-turn gap satisfying condition , where Δl is coil turn-to-turn distance, m; ρ_c is coil metal resistivity, Ohm m; ρ_uc is cooling liquid resistivity, Ohm m; σ,E,α_t,α_e are, respectively, ultimate strength, N/sq. m, Young's modulus, N/sq.m, heat-transfer coefficient, W/m deg, thermal expansion coefficient of capillary tube material, 1/deg.; d is internal diameter of capillary tub, m; A, B are empirical constants of capillary tube found from equation m², where U is discharge supporting voltage, V; I is maximal working current of discharge, A; L is capillary tube length, m. EFFECT: improved reliability and service life.