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Optimization of lattice with MATTER element
Posted: 07 Nov 2024, 19:46
by pratik
Hi,
I am looking into using the MATTER element with thicknesses less than 0.001
X0. Is there a way to use this element and optimize the lattice?
The probabilistic model does not allow me to easily do this. However, if I can stop it from changing after some evaluations, it could be possible.
Let me know if this could be possible.
Best,
Pratik
Re: Optimization of lattice with MATTER element
Posted: 12 Nov 2024, 17:13
by michael_borland
Pratik,
You can try using the &transmute_elements command to turn the MATTER elements into drifts.
Code: Select all
&transmute_elements
name = *, type = MATTER, new_type = DRIF
&end
&run_setup
...
--Michael
Re: Optimization of lattice with MATTER element
Posted: 25 Jan 2025, 19:51
by pratik
Hi Michael,
Thanks for your reply. I do want the MATTER element to be there. Do you think setting restart_random_numbers = 0, is a better choice. I do get the optimization to work with that change but it is still not monotonically decreasing. I am also switching to parallel_optimization for faster convergence. Let me know what you think about this and if there is any better way to do it. I am attaching the files.
Re: Optimization of lattice with MATTER element
Posted: 11 Feb 2025, 20:12
by pratik
pratik wrote: ↑25 Jan 2025, 19:51
Hi Michael,
Thanks for your reply. I do want the MATTER element to be there. Do you think setting restart_random_numbers = 0, is a better choice. I do get the optimization to work with that change but it is still not monotonically decreasing. I am also switching to parallel_optimization for faster convergence. Let me know what you think about this and if there is any better way to do it. I am attaching the files.
Re: Optimization of lattice with MATTER element
Posted: 24 Feb 2025, 16:34
by michael_borland
If you want to optimize with the MATTER element in place, then setting restart_random_numbers=1 in the optimization_setup command is the right thing to do. That should ensure that the random effects are the same each time.
--Michael