analyze_map

• type: action command.
• function: find the approximate first-order matrix and related quantities for an accelerator by tracking.

&analyze_map
    STRING output = NULL;
    double delta_x = 1e-6;
    double delta_xp = 1e-6;
    double delta_y = 1e-6;
    double delta_yp = 1e-6;
    double delta_s  = 1e-6;
    double delta_dp = 1e-6;
    long center_on_orbit = 0;
    long verbosity = 0;
&end

• output -- The (incomplete) name of a file for SDDS output.
  • Recommended value: ``%s.ana''.
  • File contents: A series of dumps, each consisting of a single data point containing the centroid offsets for a single turn, the single-turn R matrix, the matched Twiss parameters, tunes, and dispersion functions.
• delta_X -- The amount by which to change the quantity X in computing the derivatives that give the matrix elements.
• center_on_orbit -- A flag directing the expansion to be made about the closed orbit instead of the design orbit.
• verbosity -- The larger this value, the more output is printed during computations.