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Beam Energy Calculation: Single Value Decomposition Threshold Tuning
Summary table



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The available links give a plot of the
  • (chi2 from the comparison between the measured antiproton orbit and the one expected from the lattice model) vs (Single Value Decomposition threshold on the W matrix)
  • (RMS of the calculated dipole kicks) vs (Single Value Decomposition threshold from SVDlat.const file, corresponding to the threshold on the W matrix)
  • (calculated dL with respect to the reference orbit from psi' of stack 67) vs (Single Value Decomposition threshold on the W matrix)
    • Around 200 plots like these have been produced to tune the Single Value Decomposition parameters. Here there is only a few samples.

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    Last update of this page -- Mon Nov 24 18:41:55 CST 1997


    Stack 3 - * chi2 of 96_10_23 : nominal energy 3556.56a 3556.56b MeV
    threshold_696.ps
    Stack 13 - * etacp of 97_02_10 : nominal energy 3660.22 3585.27 MeV
    threshold_1180.ps
    threshold_1186.ps
    Stack 44 - * etac of 97_06_05 : nominal energy 2956.2 MeV
    threshold_2309.ps
    Stack 56 - * 1p1 of 97_07_17 : nominal energy 3525.7 MeV
    threshold_3005.ps
    Stack 79 - * pipi of 97_09_17 : nominal energy 3270 MeV
    threshold_3346.ps

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    useful links:

    E835 Home Page


    E835 run info table: alphanumerical ; only numerical (useful for paw)
    Offline energy calculation stack per stack
    Golden Data Stream and DSTs Page
    Luminosity Home Page

    ACNET run number stack per stack
    BPM saturation history
    Single Value Decomposition Threshold Plots
    Beam Position and Angle at the target from BPMs
    Systematic error in the energy calculation neglecting 2nd order terms in the calculation of dL
    BPM position vs time stack per stack

    Maintained by Gabriele Garzoglio.
    Comments, problems or questions -- please send mail.