CEA Codes forum

Hi Didier,

In my side,the transverse phase space is very different between the RFQ field map and Toutatis: I am curious why there is such a significant difference.

Regards,

Shuo

Dear Didier, 1. I understand that Toutatis is the dedicated code for RFQ simulations. However, I would still like to cross-check the results by tracking particles through an RFQ field map in TraceWin. In September 2024, I asked a similar question about using an RFQ field map in TraceWin. At that tim...

Dear Didier, I have download the latest version, and the display problem is fixed. Here, i have another problem. When i try to add a DTL filedmap following the MEBT and run it with RFQ. The final output is incorrect. If i remove the RFQ part in the .dat and run it in another separate file, it works....

Dear Didier, I want to simulate a RFQ fieldmap + MEBT, and get the envelop of the linac. Considering the output of RFQ fieldmap has multiple bunches，i adopt the following syntax to get the envelop and use the modified RFQ fieldmap output (merged into one bunch) as the input for MEBT. DRIFT 0.00001 1...

Dear Didier,

much thanks!

Regards
Shuo

Dear Didier,

i encountered a problem when i performed RFQ error study in Multiparticle with Toutatis.
There is no error for DTL error study.

The setup and error messages are attached.
Thanks,
Shuo

Dear Didier,

I appreciate the phase adjustment tip for working with the RFQ field map in TraceWin.
Your guidance is very valuable. I’ll take this into account in my simulations and adjust the RF phase accordingly.

Regards,

Shuo

Dear Didier,

i did further testing today. When i changed the beam current from 2mA to 5mA, this issue appeared again.
In addition, how to determine the RF phase of the RFQ field card? Why is it -50°? And could you plz provide me some references?

Best regards,

Shuo

Dear Didier, Thank you for the explanation. i have proceed with a test using the latest version of TraceWin. The .dat file is as below: Drift 0.00001 6 Drift 0.00001 6 Field_map 00700 2552.400 -50 3.162 0.0 1.0 0.0 0 3IBCs2_phase57b 1 Drift 0.00001 6 Drift 0.00001 6 END The RF phase of the field car...

Dear Didier, Great! The difference of the transverse phase space is solved in the latest updated TraceWin. For the multi-bunch effect at the RFQ output, there still seems to be multiple bunches at the RFQ output when i adjusted the RF phase of the field card to -50° as you suggested. The original ph...