TY - JOUR
T1 - Laser-fluorescence experiments with a continuous argon-ion laser in an argon plasma
AU - Yuasa, K.
AU - Willems, H.M.J.
AU - Sijde, van der, B.
AU - Schram, D.C.
PY - 1988
Y1 - 1988
N2 - We have carried out laser-fluorescence experiments in the argon plasma of a hollow cathode arc (HCA) using a continuous argon-ion laser, operating at one of four different laser lines in the single-line mode. By measuring the fluorescence intensity of the lines originating from an upper level identical to that of the pumping lines, we observed negative fluorescence when the laser light is incident on the plasma, i.e., we found a decrease of the line intensity resulting from inversion. We have determined absolute density inversions between the 4p- and 4s-levels for electron density (ne)-values between 8 × 1018 and 1 × 1020m-3, as determined by Thomson scattering. All of the observed lines show quenching of the density inversions at an electron density of 1 × 1020m-3.
AB - We have carried out laser-fluorescence experiments in the argon plasma of a hollow cathode arc (HCA) using a continuous argon-ion laser, operating at one of four different laser lines in the single-line mode. By measuring the fluorescence intensity of the lines originating from an upper level identical to that of the pumping lines, we observed negative fluorescence when the laser light is incident on the plasma, i.e., we found a decrease of the line intensity resulting from inversion. We have determined absolute density inversions between the 4p- and 4s-levels for electron density (ne)-values between 8 × 1018 and 1 × 1020m-3, as determined by Thomson scattering. All of the observed lines show quenching of the density inversions at an electron density of 1 × 1020m-3.
U2 - 10.1016/0022-4073(88)90151-3
DO - 10.1016/0022-4073(88)90151-3
M3 - Article
VL - 40
SP - 135
EP - 141
JO - Journal of Quantitative Spectroscopy and Radiative Transfer
JF - Journal of Quantitative Spectroscopy and Radiative Transfer
SN - 0022-4073
IS - 2
ER -