CEA Codes forum

.dst file will prevail.

R

Physics of RFQ Designer is in section 6.2 of the attached doc.

Best,

Romuald

Hi, If you want to increase the transverse acceptance of your RFQ for a given particle, you can increase the voltage and/or the wavelength. For getting matched Twiss parameters and if you do not have Toutatis, RFQDesigner can only try to find Twiss parameters in envelop mode but this does not work a...

I do not have any example script for a varying vfac. I am sorry. But basically, your script has to build a new .inp with a copy of an orginal .inp until the command vfac to be adjusted, then add a new line with "end". Finally run 'toutatis.exe -i new.inp -nox" and gets results in toutatis.out to be ...

Hi Yes, the variable VFAC is made for that purpose. By default, it is equal to 1. Also, it is to you to write a script for producing a sequence of .inp files with changing VFAC and run the code. Please note that, at the moment, you decrease the voltage, obviously, the transmission will decrease also...

About the transmission discrepancy, be sure you use the last version of Toutatis and TraceWin. The part of the Tracewin code simulating RFQs is actually Toutatis as a library. So you should get exctaly the same results. Also take care of the new commands: DW_FILTER dW => make that Toutatis will use ...

I understand you would like to plot the acceptance of the RFQ. Well, I would do as for any other part of a linac, set no space charge and simulate a large beam (large transverse emittances) and activate the output rfq.plt with the command: COMPRESSION_FACTOR 0 At the end of the run you should get a ...

Could you elaborate on "survivor ellipse" please?

R

Hi These commands are addressed in page 8 of the manual and the instructions refer to the file example.inp that adds explanations. For your information, we are revisiting the doc to limit such situations in the future. Anyhow: RHO 0.85 => this is the ratio between rho/R0. Historically for the whole ...

Hi

We have many problems with Mac versions. I am currently revisiting the GUI with Qt and hope to release a new version for Win10/Mac/Linux in a couple of months. I hope it will work with your MacOs version but I can not guarantee that.

Best