Experimental and theoretical analysis of bias ionization by α-particles in a nitrogen laser

Spectral Analysis of the Amplified Spontaneous Emission in the Second Positive System of the N2 Molecule

“…These pulses, for this pressure and charge voltage, were approximately 15 kW peak power. 13 A typical ASE pulse is shown in Fig. 1.…”

“…The discharge channel had a length of 75 cm and a height of 1.5 cm, with a distance between electrodes of 4 mm. More details can be found in Silva et al 13 It is worth noting that, in all the results presented here, the bias ionization from a-particles discussed in Silva et al, 13 was not used in the inversion process. The discharge tubes have operated without any pre-or biasionization.…”

“…From the theoretical point of view, some authors have already modelled the ASE action in the nitrogen UV transition, some with simpler premises, 10,11 others with more sophisticated models 12 and others including ionization effects in the active medium. 13…”

“…[7][8][9] From the theoretical point of view, some authors have already modelled the ASE action in the nitrogen UV transition, some with simpler premises, 10,11 others with more sophisticated models 12 and others including ionization effects in the active medium. 13 However, another interesting point with respect to the gain in this transition is the fact that the gain varies as a function of the rotational branch and the value of the quantum number J within each branch. This behavior has already been observed by Patel 14,15 in the CO 2 and CO laser and more recently by Amorim et al 16 Based on the gain coefficients proposed by Bennett, 17 a first spectroscopic analysis of the gain as a function of the rotational quantum numbers for each branch in the 0-0 band of the C 3 Å u !…”