Parameters to choose in optimization

Hello,

I’m working on the ex optimization when passing through a 4 bends chicane.As our initial energy spread is too large,and we want to put into some  other magnets,may be sextupoles or quadrupoles,to get a better performance. I want to know is there some key parameters to get a better solution in optimization?(n_passes,n_evaluations,etc…)How to definite the appropriate values for them? And you had claimed that “simplex” may converge to a local solution,is there any methods to prevent this?

Any help will be apprecited.

I didn’t find the right solution from the Internet.

References:
https://www3.aps.anl.gov/forums/elegant/viewtopic.php?t=763
Whiteboard video production studio

Thank you.

 

 

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