Figure 4
High temperature absorbance spectra of argon and hydrogen post-cleaning. (a) Time evolution of the absorbance and (b) line profiles of the 220 nm and 256 nm peaks for hydrogen; (c) Time evolution of the absorbance and (d) line profiles of the 220 nm and 256 nm peaks for Argon. Lines at 180 s denote when the respective gases are added in vacuum.
