Figure cont.3 : Stability of SMD Response. This comparison of the SMD-recorded spectrum of the Cu anode at 981113 and 980106 shows little indication for evolution of the SMD response. Note that the later data set (dashed line) has more O-K present -- likely leading to the slight reduction of the Cu line relative to the high-energy continuum seen in the ratio plot. The anode was cleaned before the 981006 test - the 981006/961113 comparison is even better!
(.ps, .ps)

ddIDL> @sxd_contamination ; edited for det_sel=SMD data_sel=6,7