CEA Codes forum

Dear Nicolas, Thank you very much for your comments and suggestions. Here are my answers to your comments. 1) Did you observe correlation between these particles and their position in transverse phase-space ? For example, by selecting particles in (phase-energy) phase-space and observing their posit...

Dear Nicolas, Related to this topic, I simulated a 30-keV DC proton beam in a 400m drift. First, with a beam current of 4 mA, as shown next: 20260519_4mA_drift_TW.png My question is the head-tail dispersion, as it is DC beam, I was expecting did not see that border effects due to the periodic condit...

Dear Didier,

Thank you very much for your confirmation.

Best regards,

Bruce

Dear Didier,

Thanks for the explanation and the advice.

Best regards,

Bruce

Dear Didier, Thank you for your answers. Please allow me to explain myself better. About my previous comment "If that is the case, it could be that one random error selects emittance values lower than the nominal, thus, when I compared the emittance are lower than the nominal without beam losses." I...

Dear Didier, Apologies for my delayed response. I updated the TraceWin version to 2.25.2.9. The error cases that I simulated did not record beam losses. (See the attached figure) Error.png I analyzed the cases, plotting the emittances, Emit4D, and Emit6D from the Statistic_Errors_1_PAR_tot.txt outpu...

Dear Didier, Thanks for your help and support. Regarding computing the phase advance in a non-periodic transport line, I am using the "phase advances" plots in the Windows "charts". However, I have the following questions: 1) For the ordinate, I should use Meter or Period, since it is not periodic, ...

Dear Didier, Thanks for your recommendations. I updated to 2.25.2.4. TW_version.png I attached the results of a short run. (I removed the last lines of the file where the type of errors is printed out). 1) The title of the last column is "Emit_6D/Emit0_4D-1" 2) The runs 7 (line 9) and 15 (last line)...

Dear Didier, Regarding the 6D emittance for the error studies, as Dr. Comunian pointed out, it is expected that the 6D emittance is preserved even when some transfer occurs in the planes. However, I simulated an error case, asking for the results to be compared against the ideal case (Beam reference...

Dear Didier,

Thank you very much for your help,

Best regards,

Bruce