1. Gain Curves Jason for the SB Crew June 5, 2007

2. Raw 55 Fe Spectra Start with 55 Fe spectrum from a MCA. Fit peak to gaussian. Calibration from a pulser turns channels into electrons. Mean of gaussian corresponds to signal from 109 electrons (in CF 4 ).

3. Raw Curves Procedure: 14 hour gain saturation curve to fully charge up the stack waited ~2 hours with voltage on to verify stable gain measured gain as a function of dV source rate: ~100 Hz

4. Raw Curves Procedure: 14 hour gain saturation curve to fully charge up the stack waited ~2 hours with voltage on to verify stable gain measured gain as a function of dV source rate: ~100 Hz

5. P/T Corrections sealed volume in gain test box allows for easy P/T mapping. in very good agreement with WIS. Therefore, gain can be adjusted for P/T variations…

6. P/T Corrected Curves Procedure: 14 hour gain saturation curve to fully charge up the stack waited ~2 hours with voltage on to verify stable gain measured gain as a function of dV corrected for P/T !! source rate: ~100 Hz

7. P/T Corrected Curves Procedure: 14 hour gain saturation curve to fully charge up the stack waited ~2 hours with voltage on to verify stable gain measured gain as a function of dV corrected for P/T !! source rate: ~100 Hz

8. Gain Saturation Curve Sample gain every two minutes for 14 hours. Fit saturation curve to saturating exponential. Gives the ability to extrapolate gain.

9. Completely Corrected Curves Procedure: 14 hour gain saturation curve to fully charge up the stack waited ~2 hours with voltage on to verify stable gain measured gain as a function of dV corrected for P/T !! use extrapolated saturation curve to correct for time… SB sees a factor of ~2 source rate: ~100 Hz

10. Completely Corrected Curves Procedure: 14 hour gain saturation curve to fully charge up the stack waited ~2 hours with voltage on to verify stable gain measured gain as a function of dV corrected for P/T !! use extrapolated saturation curve to correct for time… SB sees a factor of ~2 source rate: ~100 Hz

11. Completely Corrected Curves Procedure: 14 hour gain saturation curve to fully charge up the stack waited ~2 hours with voltage on to verify stable gain measured gain as a function of dV corrected for P/T !! use extrapolated saturation curve to correct for time… source rate: ~100 Hz **note** the WIS data is from two different stacks… a gem was exchanged. --maybe not comparable.