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BPM Calibration Data

Beam position in the horizontal plane is determined by dividing the difference of the two horizontal (right and left) signals by their sum and applying the offset and resolution factors determined in calibration. Since X and Y are decoupled, repeating the process with the vertical (top and bottom) signals creates an XY pair at which the beam centroid lies. The equations are: X = (Right-Left)/(C(Right+Left))-B/C and Y = (Top-Bottom)/(C(Top+Bottom))-B/C Where Right, Left, Top and Bottom are the voltages measured from the corresponding signal plate, C (slope) is the calibration number and B (X-intercept) is the offset number.



Wall-Current Monitor
4.545  mV/mA















BPM DATA AT A GLANCE












Horizontal Vertical Horizontal Horizontal Vertical Vertical
Location BPM # Calibration(1/mm)* Calibration(1/mm)* Offset (Best Fit)* Offset (Actual)** Offset (Best Fit)* Offset (Actual)**
IC2 6 0.0804 0.0796 -0.0223 -0.0243169 -0.0503 -0.053508
RC1 1 0.0838 0.0751 0.0305 0.0268112 0.1314 0.1492132
RC2 3 0.0839 0.0787 -0.002 0.01491979 0.0305 0.0213677
RC3 5 0.0784 0.0802 0.1336 0.131098 -0.0185 -0.0136121
RC4 Ind Gap ------ ------ ------ ------ ------ ------
RC5 8 0.0774 0.0779 -0.0677 -0.08338 0.0195 0.012119
RC6 7 0.0802 0.0813 0.045 0.003764 0.0404 0.039569
RC7 10 ------ NO DATA FOUND ------ ------ ------ ------
RC8 15 ------ NOT YET CALIBRATED ------ ------ ------ ------
RC9 9 0.0794 0.0795 -0.0521 -0.0633 0.0222 -0.02131
RC10 Ind Gap ------ ------ ------ ------ ------ ------
RC11 12 0.0768 0.0761 0.0328 0.06514 0.018 -0.0048
RC12 13 0.078 0.0782 0.0084 0.01518 -0.0149 -0.01741
RC13 4 0.0772 0.0752 0.058 0.038728 0.00007 -0.04603
RC14 14 0.0768 0.0771 0.0067 0.01714 -0.0141 -0.02672
RC15 11 0.0815 0.0793 -0.0322 -0.04306 0.0204 0.01232
RC16 Ind Gap ------ ------ ------ ------ ------ ------
RC17 2 0.0767 0.0827 -0.0063 -0.014634 0.0689 0.014706

AVERAGE


0.07926923
0.07853077
0.01018462
0.00646847
0.01950538
0.0050696
* From best fit line (Y = mX+B) of points calculated from data in one of the following manners



Horizontal = (R-L)/(R+L)





Vertical = (T-B)/(B+T)






Resolution = m






Offset = B




** Actual data for the center point (zero "Beam" offsets in both X and Y)










NOTE: BPM 1-9, calibrated by BQ; BPM 10-14 calibrated by AD



















Created by bryan
Contributors : B. Quinn, B. Beaudoin
Last modified 2018-01-31 04:18 PM

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The UMER Project is supported by the U.S. Department of Energy, Office of Science, and by the US Department of Defense, Office of Naval Research and the Joint Technology.