DC DISCHARGE ENHANCEMENT OF CHEMICAL ACTIVITY IN LASER-PRODUCED PLASMA

Using an optical spectroscopy analyzer (OSA), the emission spectra of XeCl-excimer-laser-produced plasma near a YBa2Cu3O7-x (YBCO) target su rface were measured. The difference of the emission spectra with and w ithout dc glow discharge was investigated. The results show that dc gl ow discharge plasma can significantly increase the emission intensity of atomic oxygen and increase emission intensities of atomic ions, but there are no obvious effects for metal atoms and metal oxides. Enhanc ement of chemical activity of the laser plasma with dc discharge may b e due mainly to the increase of concentration of atomic oxygen.