&twiss_analysis
STRING match_name = NULL;
STRING start_name = NULL;
STRING end_name = NULL;
double s_start = -1;
double s_end = -1;
STRING tag = NULL;
long verbosity = 0;
long clear = 0;
&end
match_name -- Optional wildcard string to match to element names for selection
of elements to inculde in the analysis.
start_name -- Name of the element at which to start analysis. If the
element occurs more than once, the first occurrence is used.
end_name -- Name of the element at which to end analysis. If the
element occurs more than once, the first occurrence is used.
s_start -- Position (in meters) at which to start analysis.
s_end -- Position (in meters) at which to end analysis.
tag -- Name prefix for quantities computed by the analysis. The quantity
names will have the form tag.statistic.quantity, where statistic
is one of min, max, and ave, and quantity is one of
betax, betay, etax, etay, alphax, alphay,
etaxp, and etayp. E.g., if tag is region1,
then one could use expressions like region1.max.betax in optimization.
clear -- If nonzero, all previously defined analysis regions are deleted.