CEA Codes forum

Dear Didier,
we are using the element ELECTROSTA_ACC of TraceWin. where In the linear matrix is present the parameter "K" (Transv. Defoc.)
This K is not used for the linear Envelope calculation, It's only used in the partran simulation.
May you explain why?
Best Regards,
Michele Comunian

Dear Didier, I have a very simple line with some steerers a triplet and a dipole. The input line is with a edge radius of 1900 mm and a dipole bending angle of 45 deg. i.e.: EDGE 11.701 1900 40 0.45 2.8 20 0 BEND 45 1900 0 20 0 EDGE 11.701 1900 40 0.45 2.8 20 0 After a steerers and quads matching in...

Dear Didier, reading the post, I've removed from the emittance calculation the not accelerated particles. The problem of transverse emittance growth is mitigate, but still present. As you can see from the figures. Emittance_growth_with_longitudinal_cut.png Emittance_cut.PNG Best Regards, Michele Com...

Dear Didier,
I've observed a transverse emittance growth at the end of any rfq, also with RFQ_1.ini, in the last very short drift. A so short drift cannot induce a so large emittance increase.
May you know why ?
Best Regards,
Michele Comunian

Dear Didier,
thank you for the plot with 360° phase period.
May you put this options also on the density plot ?
Best Regards,
Michele Comunian

Dear Didier, thank you for the information. Yes, my problem is on particles display and longitudinal emittance calculation. So, the phase module is done always, even without space charge, if I have understood you answer. I will put this as a question: Is it the phase module done always in a run? Now...

Dear didier, yes a particles is not lost after 180deg, but is far out the main bunch. It is like a particles of the previous bunch "appear" on the main bunch. If Tracewin follow only a single main bunch the longitudinal space charge calculation on the main bunch is alterated by the "far" particle (>...

Dear Didier,
may you insert on TraceWin, as option, the possibilty to do a phase module on 180 deg on particles?
I.e. instead to be consider lost a particle outside +/- 180° re-insert the particle in the main bunch ?
Best Regards,
Michele comunian

Dear Didier,
with the phase advance put to 10 now works!
Best Regards.
Michele comunian

Dear Didier,
in the attached tracewin project, a long RFQ, is not working the option to calculate the input matched beam with Partran.
Best Regards,
Michele Comunian