Elegant users forum

Dear Michael, There is one more thing I need your help of this TFDRIVER element. By reading the manual, I am confused about the setting of FIR filter with the arbitrary delay and UPDATE_INTERVAL value not equal 1. For simplicity, assume the input filter TFBPICKUP with settings as A0=1, UPDATE_INTERV...

Dear Michael, Recently, I am trying to learn Elegant simulation model for the bunch-by-bunch feedback with TFDRIVER element in transverse planes. I read the source code, and there is one thing I did not get it, hopefully, you can help me clarify it. Th codes are between line 427 and 444 in the tfeed...

Chao, The recirculation element is to allow setup steps to take place prior to multi-turn tracking in a ring. The original inspiration was to allow tracking through a transport line and injection elements, followed by multi-turn tracking. Although the feature is kept for backward compatibility, it ...

Chao, The problem is that your CHARGE element is downstream of a recirculation element (RC). So the beam only sees the CHARGE element on the first pass through the beamline. I don't think you need the recirculation element. --Michael Thanks Michael, Great thanks for your answers. I got it. For a fu...

Dear Michael， I am tying to make a test run which ramps the beam current in the first several hundreds turns. Somehow, not be able to do that. The attached files shows the script I prepared, could you please take a look and help me to fix it. PS: I found that the output of the &ramp_elements command...

Chao, I wonder if in the case using bunch duplication you are setting the use_bunched_mode flag? I would expect using N bunches to slow things down, because there is N times as much interprocess communication (assuming that IBS is a dominant factor in the simulation). --Michael Thanks for your expl...

Dear Michael, I think I found the reason why the simulation speed is not well scaled in my simulation. It seems like that comes from the settings of particleID. When I prepare the simulation, I prepare the multi-bunches externally, in which I ensure that each particle has a unique particleID. In thi...

Dear Michael

Thanks for your explanation. I also checked the elegant source code about the IBS and TScatter element.
As you described, it is clear.

Thanks again.
yours Chao

Dear Michael, Recently, we are trying to simulate the multi-bunch together with multi-IBS scatter element. We are trying to see the computation efficiency of the for different scenarios. The 6 cases we studied are 1. 80 bunches, (load in &sdds_beam command and data is separated by page), and each bu...

Dear Michael, Thanks for your reply. I realized that I probably asked wrong questions in my last post. To make less confusion, I deleted the last post and summarize my question in this post. The question is in elegant computing, what these two elements (ibsscatter and TSCscater) do to affect particl...