Run 11 polarization decay

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Last modified by Dmitri Smirnov on 25-01-2012

For this study we use fills with similar machine conditions:

15365, 15366, 15368, 15372, 15376, 15378, 15380, 15386, 15390, 15393, 15399, 15425, 15427, 15435, 15436, 15438, 15443


Polarization vs time in fill

The polarization decay reported in the stat box is shown in absolute polarization (%) lost (or gained) per second. To get the number in human format (i.e. absolute polarization percents per hour) one need to multiply the number in the stat box (the "slope" parameter) by 3600.

The zero time 00 in the following plots corresponds to the first measurement in a store.

The average slope for blue ring is 0.3 ± 0.05 %/hour
The average slope for yellow ring is 0.8 ± 0.06 %/hour

C hPolarVsFillTime B1U.png C hPolarVsFillTime Y2U.png
Blue-1 Upstream
slope = -0.39 ± 0.07 %/hour
Yellow-2 Upstream
slope = -0.79 ± 0.07 %/hour
C hPolarVsFillTime B2D.png C hPolarVsFillTime Y1D.png
Blue-2 Downstream
slope = -0.19 ± 0.07 %/hour
Yellow-1 Downstream
slope = -0.86 ± 0.11 %/hour
Polarization vs Time in Fill

Note the not so good per degree of freedom.

Profile ratio R vs time in fill

C hRVsFillTimeBinned B1U.png
C hRVsFillTime B1U.png
C hRVsFillTimeBinned Y2U.png
C hRVsFillTime Y2U.png
Blue-1 Upstream Yellow-2 Upstream
C hRVsFillTimeBinned B2D.png
C hRVsFillTime B2D.png
C hRVsFillTimeBinned Y1D.png
C hRVsFillTime Y1D.png
Blue-2 Downstream Yellow-1 Downstream
Profile r vs Time in Fill


Relative beam polarization by measurement number in a fill

One should be very careful interpreting these results as there is no guarantee that the sequential number of the measurement is correct.

C hPolarVsMeasId B1U.png C hPolarVsMeasId Y2U.png
Blue-1 Upstream Yellow-2 Upstream
C hPolarVsMeasId B2D.png C hPolarVsMeasId Y1D.png
Blue-2 Downstream Yellow-1 Downstream
relative Polarization vs Measurement Id in Fill


Profile ratio R by measurement number in a fill

C hProfileRVsMeasId B1U.png C hProfileRVsMeasId Y2U.png
Blue-1 Upstream Yellow-2 Upstream
C hProfileRVsMeasId B2D.png C hProfileRVsMeasId Y1D.png
Blue-2 Downstream Yellow-1 Downstream
Profile Ratio R vs Measurement Id in Fill


Last modified by Dmitri Smirnov on 25-01-2012