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

run_10060035.png

run_10060036.png

run_10060037.png 

 

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

run_10063009.png

run_10063010.png

run_10063011.png

run_10063012.png

run_10063013.png

run_10063014.png

run_10063016.png