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Current status Minjung Kim
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contents SMD gain fit Beam position scan Local polarimetry
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SMD ADC distribution: 2 exponential fit
[0]*exp{ -(ADC-ped)*[1] } + [2]*exp{ -(ADC-ped)*[3] }
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Fit parameters [0]*exp{ -(ADC-ped)*[1] } + [2]*exp{ -(ADC-ped)*[3] }
If [1] propotianal to [3], gain can be set propotianal to [1] ([3]). -> [1], [3] correlate
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[1], [3] correlation: correlate
p1=[1], p3=[3] set gain for each channel: Relative gain of each channel= ( [3] + [1]*3.111 )/0.2 Gain= ( [3] + [1]*3.111 )/0.2 /average or Relative gain -> make gain average=1
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Comparison with DB
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XY distribution: left-DB gain, right-New gain run386408 south
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run north
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run south
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run north
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Phi asymmetry for center
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Asymmetry vs energy
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Beam position scan Assume center for 81 positions (-2.0~2.0, 0.5 cm interval. x,y 9x9 ), then calculate raw asymmetry Position with largest asymmetry will be center Plots for all fills : plot/
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Beam position scan for transverse fill
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Beam position scan for longitudinal fill
Several fill’s example. Should check asymmetry for several position because it is hard to see center/moves
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Longitudinal component for run13
Ignore fitting.
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plan Organize results. Check code’s bug.
Finish analysis note (~ middle of May )
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Back up
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Red points: I fit with [0]
Red points: I fit with [0]*cos(x-[1]), so [0] can be (-) depend on what value it get [1]. If see only absolute value, this result makes sense.
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