CEA Codes forum

Dear Didier, I have a few questions regarding the use of space charge compensation in TraceWin that I would like to clarify. For a proton beam, I understand that the space charge compensation can often be approximated as about 90%. Therefore, I set in my data file: SPACE_CHARGE_COMP 0.9 Based on thi...

Dear Didier, After carefully reviewing the TraceWin user manual and related materials, I would like to confirm my understanding of the space charge settings in Partran and ask a few questions. My current understanding is as follows: 1.Calculation step / Space-charge step** These parameters define th...

Dear Didier I think my previous question may not have been very clear. After reading the manual, I understand that the gas stripping and scattering options in multiparticles need to be used together with the GAS command. However, I am still not sure about the practical application scenarios of this ...

Dear Didier,
I revisited the software and realized that my previous question was actually quite stupid. Thank you very much for your reply and your patience.

I have a question regarding the bunch frequency setting. I have read some previous discussions on the forum, but I am still not fully clear about it. My current understanding is that this parameter is related to the space-charge calculation. Therefore, I would like to ask: 1.Are there any recommende...

I have noticed that there are several options related to halo particles and emittance definitions in different parts of TraceWin . I am trying to better understand how these settings are used. I have two main questions: 1.Do these settings apply to different stages of the calculation process? 2.As s...

I have a question about the scattering and stripping options in Partran. I could not find a clear description of their application scenarios in the user manual. Could you please explain when these options should be used and what kind of physical effects they are intended to model? Additionally, shou...

I’m trying to understand how the “Match with Family & Twiss commands” option works in relation to the “2 steps matching optimization for (1) and (2)” section. That section includes two stages: First step: Set Twiss parameters at first period input and output equal Second step: Phase advance smoothin...

I am trying to understand the “2 steps matching optimization for (1) and (2)” part in the MATCH command (see attached screenshot). In the panel, there are three matching options: (1)Calculate input matched beam (2)Match with Family & Twiss commands (3)Match using Diagnostics Below that, it says “2 s...