Elegant users forum

Tiansk, I don't think transforming to a round beam addresses the fundamental issue with the smooth=0 simulation, namely, that it attempts to model (x', y', delta) scattering from a section of a beamline with kicks at a particular location. The right way to address this is to accumulate a scattering ...

I downloaded your files and they work without errors. Perhaps try the latest version of the code?

--Michael

Zhenbiao, Elegant does not have that capability. There are some similar capabilities that might get you some of what you want: 1. RFTMEZ0 allows simulating a TM-mode rf cavity specified by the on-axis Ez field. 2. SHRFDF allows simulating a deflecting cavity using space harmonics. 3. SCRIPT allows i...

Tiansk,

Could you provide your input files so I can check the results?

In general, I recommend using smooth=1 because otherwise you inject additional noise into the simulations.

--Michael

Zhenbiao, Operationally, the way to handle this is to perform beam-based-alignment (BBA) so that you know the BPM offsets relative to nearby quadrupoles. In a simulation, you can mock this up by assuming that the BPM offsets are small. How small is determined by the anticipated accuracy of the BBA. ...

Version 2025.2 has been released. It features several bug fixes and some new features. Details are in the manual.

--Michael

Version 2025.2 has been released. It features several bug fixes and some new features. Details are in the manual.

--Michael

Monika,

I don't see anything obviously wrong with the processed file. Can you upload the input file you are using with geneticOptimizer?

--Michael

Mikhail,

This bug was introduced when I refined the calculation of radiation integrals to better include orbit effects. The fix was pretty simple, see attached.

Thanks for the bug report.

--Michael

Mikhail,

The problem is caused by dipole magnet called R.MB12, which has ANGLE=0. I'm not sure why it is a problem now and not in the previous version, but I'll find a solution now that I can see it.

--Michael