CEA Codes forum

Hello Didier, When performing beam centering with steerers, a significant amount of time is often spent in the optimization process to align the beam on the BPMs. The use of the maximum value parameter in the steerer command should in principle help to constrain the search space. However, it is not ...

Hello, we would like to simulate a bending magnet (dipole) including the potential harmonics that are expected due to manufacturing and alignment imperfections (typically b3 (sextupole) and b5 (decapoles)). This option is available for quadrupoles, but not for the bend command. I have been looking i...

We would like to impact the beam on a surface that is rotated by 9° with respect to the main accelerator axis. To obtain the beam distribution in the reference system of the target — which is rotated 9° from the accelerator axis — can we use the beam_rot command as follows? beam_rot 0 9 It’s not ent...

Hello Didier, I have a question regarding the use of steerers inside field maps. Generally, steerers, used as correctors, are not fully characterized from magnetically point of view, so they are not inserted as field maps, but with the hard edge model. However, if we use long field maps for quadrupo...

Thank you Didier!

Hello Didier, I have some doubts about the proper way to tune a bending magnet when we use a field map to obtain the nominal line deviation. Once the magnet is electromagnetically designed, the field map could lead to a slightly different beam deviation and some matching of the kb parameter could be...

Romuald,
thank you so much for your suggestions. We will take them into account!

I would like to ask for a general question about how to proceed, not when we are designing an RFQ, but when we already have the RFQ 3D model, in a step file. The idea is to perform a benchmarking from previous beam dynamics performed with alternative codes. So, the question is from a 3D model, with ...

Dear Didier, I have some doubts regarding NCELLS command: 1) Is there any way to plot the particle density along the NCELLS with more detail? What I've seen is you use only the values at the end of the NCELLS, not having the possibility to analyze the beam extension along the cavities. 2) Trying to ...

Thank you Nicolas.
I will keep you informed
Conchi Oliver