I analyzed run 9875 from December 23, 2010 and extracted relative gains for the upstream and downstream BCMs. It was relative because we did not get data for the faraday cup so the calibration is against OLO2 assuming that OLO2 calibration has not changed.
(counts against "clkcount") U1 coeff=0.279+/-0.001 const=-0.208+/-0.022 U3 coeff=0.090+/-0.000 const=-0.053+/-0.009 U10 coeff=0.059+/-0.000 const=-0.011+/-0.007 D1 coeff=0.248+/-0.001 const=-0.112+/-0.022 D3 coeff=0.080+/-0.000 const=-0.022+/-0.009 D10 coeff=0.025+/-0.000 const=-0.005+/-0.007 U1 tcl process constant= 3671 offset= 764 U3 tcl process constant= 11342 offset= 605 U10 tcl process constant= 17268 offset= 186 D1 tcl process constant= 4134 offset= 464 D3 tcl process constant= 12847 offset= 285 D10 tcl process constant= 40544 offset= 188
These results are to be compared to the one from the December 3rd calibration here. The gain of the BCMs compared to the one from OLO2 are constant to better than 1%. Good.