Elegant users forum

I'm trying to plot a series of data sets, the .out file from elegant, against a baseline data set. I'd like the series of data sets to be on top of the baseline data set. I create the series of data sets by using sddscollapse to put them all in to one file to plot them. All permutations of the sddsp...

I have one more clue. I cannot use beam line element parameters (quad strength, drift lengths, bend angles) in optimization_term, optimization_covariable, or rpn_expression unless they are also used as optimization_variables as well. At the moment I have output_at_each_step commented out because I n...

I'm trying to optimize a toy beam line and I can't access all the parameters I want to because of unexpected behavior of the output_at_each_step flag in twiss_setup. When the flag is set (output_at_each_step = 1), the following optimization_covariable throws an unknown token: &optimization_covariabl...

Ohh wow, I've probably used those functions a hundred times and I just couldn't see that missing minus sign. Thank you! I guess what is happening is that once the selt function gets all the inputs it needs it ignores the rest of the stack. That would explain why the error wasn't fatal and why the co...

I realize this thread is over 10 years old, but I'm having a very similar issue. I'm trying to constrain the phase advance between two points, it shows up in the optimization routine apparently fine: MARK-NLAE.02#1.psix MARK-TARG.A2#1.psix 3.35 0.1 selt: 0.000000000000000e+00 As you can see it is ze...

Yep. That did it. I had each element divided in to 10. Thank you!

I'm pretty sure I've both made this mistake and asked this question before.

I'm trying to optimize a beam that allows some of the quadrupoles to "float" as I don't really care where they go as long as the total drift is fixed. I constrain the total drift using the following command: &optimization_term term = "MDL-D.02.L MDL-D.03.L + 0.296 0.01 sene", weight = 1 &end When th...

Good to know, thank you.

I am running a correction routine on a strongly coupled transport line using solenoids and when it is done it does an excellent job on the y-direction and appears to ignore the x-direction. Here is my call to the &correct command: &correct disable = 0, n_iterations = 50, n_xy_cycles = 50, force_alte...

The problem with XtAppCreateShell while running mpl_motif was the key. I didn't have any kind of X windows. I did the following and sddsplot now works: Install VcXSrv Run it once to select start up options and save a configuration file Move that configuration file (not xlaunch.exe) to the windows st...