Initial ZDC Local Polarimetry Results (Run 9)
Beam polarization values and spin pattern used were determined using cdev files. The spin pattern was matched to the raw bx7. (avgAsymXS / analyzingPowerS) was used to determine the beam polarization.
Only used 1 hit per event. Hit defined as intersection sector from the max adc vertical and max adc horizontal slat.
East φ=0 gives zero value because it uses vertical channel 4 and it wasn't working.
Trigger Conditions
10060035: ZDC East ADC GE Th, ZDC West ADC GE Th
ZDC_QT_E_Th: 150
ZDC_QT_W_Th: 300
10060036: ZDC East ADC GE Th, ZDC West ADC GE Th
ZDC_QT_E_Th: 150
ZDC_QT_W_Th: 300
10060037: ZDC East ADC GE Th, ZDC West ADC GE Th
ZDC_QT_E_Th: 120
ZDC_QT_W_Th: 120
10063009: BBC Small East ADC, BBC Small West ADC, ZDC Front East ADC, ZDC Back East ADC
BBCsmall-EastADCsum-th : 100
BBCsmall-WestADCsum-th : 100
ZDC_QT_E_Front_Th: 60
ZDC_QT_E_Back_Th: 60
10063010: BBC Small East ADC, BBC Small West ADC, ZDC Front East ADC, ZDC Back East ADC
BBCsmall-EastADCsum-th : 100
BBCsmall-WestADCsum-th : 100
ZDC_QT_E_Front_Th: 60
ZDC_QT_E_Back_Th: 60
10063011: BBC Small East ADC, BBC Small West ADC, ZDC Front West ADC, ZDC Back West ADC
BBCsmall-EastADCsum-th : 100
BBCsmall-WestADCsum-th : 100
ZDC_QT_W_Front_Th: 60
ZDC_QT_W_Back_Th: 60
10063012: BBC Small East ADC, BBC Small West ADC
(ZDC Front West ADC, ZDC Back West ADC) AND/OR (ZDC Front West ADC, ZDC Back West ADC)
BBCsmall-EastADCsum-th : 100
BBCsmall-WestADCsum-th : 100
ZDC_QT_E_Front_Th: 60
ZDC_QT_E_Back_Th: 60
ZDC_QT_W_Front_Th: 60
ZDC_QT_W_Back_Th: 60
10063013, 10063014, 10063016: Same as 10063012
Fitting Parameters
p0: Amplitude
p1: Phase Shift
errorPropagation.pdf shows the equations used to determine the statistical uncertainties.
Runs 10060035-10060037
Spin Pattern
0, 0, 5, 0, 9, 0, 6, 0, 10, 0,
9, 0, 5, 0, 10, 0, 6, 0, 5, 0,
9, 0, 6, 0, 10, 0, 9, 0, 5, 0,
10, 0, 6, 0, 0, 0, 0, 0, 0, 0,
0, 0, 9, 0, 5, 0, 10, 0, 6, 0,
5, 0, 9, 0, 6, 0, 10, 0, 9, 0,
5, 0, 10, 0, 6, 0, 5, 0, 9, 0,
6, 0, 10, 0, 9, 0, 5, 0, 10, 0,
6, 0, 5, 0, 9, 0, 6, 0, 10, 0,
9, 0, 5, 0, 10, 0, 6, 0, 5, 0,
9, 0, 6, 0, 10, 0, 9, 0, 5, 0,
10, 0, 6, 0, 0, 0, 0, 0, 0, 0
Beam Polarization
Yellow: 0.25 ± 0.06 Blue: 0.16 ± 0.038
Runs 10063009-10063016
Spin Pattern
0, 0, 5, 0, 9, 0, 6, 0, 10, 0,
9, 0, 5, 0, 10, 0, 6, 0, 5, 0,
9, 0, 6, 0, 10, 0, 9, 0, 5, 0,
10, 0, 6, 0, 0, 0, 0, 0, 0, 0,
0, 0, 9, 0, 5, 0, 10, 0, 6, 0,
5, 0, 9, 0, 6, 0, 10, 0, 9, 0,
5, 0, 10, 0, 6, 0, 5, 0, 9, 0,
6, 0, 10, 0, 9, 0, 5, 0, 10, 0,
6, 0, 5, 0, 9, 0, 6, 0, 10, 0,
9, 0, 5, 0, 10, 0, 6, 0, 5, 0,
9, 0, 6, 0, 10, 0, 9, 0, 5, 0,
10, 0, 6, 0, 0, 0, 0, 0, 0, 0
Beam Polarization
Yellow: 0.36 ± 0.073 Blue: 0.21 ± 0.045
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