line-by-line inversion
1.Processing method of chord_integral spectral signal has been discussed. Radial profile of spectral line emission coefficient has been derived from the distribution of intensity by Abel inversion. The local ion temperature and rotation velocity has been obtained from the line shape by a chosen_point fitting technique.
2.The analytical solutions of the gain,dispersion and population difference in the steady state of an open ladder lasing without inversion(LWI) system are at first given when the phase fluctuation of the driving field is considered.Then the effects of the driving field phase fluctuation on the gain,dispersion and population difference are analyzed by the numerical results from the analytical solutions.Our research shows that the phase fluctuation of the driving field will results in a finite line width;with the line width increasing,the gain decreases monotonously,however,variation of the dispersion isn?t monotonous,it has a maximum value when the line width takes some value;the line width varying can?t lead to change lasing from without to with population inversion.
3.The lateral distribution of electron number density at 0、2、5、10 mm above the load coil in Ar air mixed coolant gas ICP was measured with Stark broadening method of H β line(486 1 nm) and some of the lateral distribution was converted into radial distribution by Abel inversion under the condition similar to that in the low power Ar ICP.
