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User name D. Parno
Log entry time 17:46:17 on March 7,2009
Entry number 265154
keyword=Compton Polarization History 3/6-3/7Here's the Compton polarization history at 4-pass running so far.
I've recalibrated the Compton beam polarization measurement for four-pass running by comparing Run 16621's measured Compton asymmetry to last night's Moller measurement (which yielded ~65.3%), which began about two hours after Run 16621.
We see that the Compton asymmetry (Fig. 1) and thus the beam polarization (Fig. 2) appears pretty stable over the runtime, and across the half-waveplate change at 8 this morning. (In Fig. 1, you can see this change where the asymmetries measured for the two laser states switch sign.)
FIGURE 1
FIGURE 2
