CEA Codes forum

shliu, bit of a curious one from me... how did you end up spotting the 360 mm vs 400.34 mm gap in the first place, just by eyeballing diag1 against the lattice view? And now Didier's said the matrix tool ignores SHIFT_IN_FIELD_MAP altogether, what are you actually planning to do for the matrix at t...

Dear Didier, Thank you for your explanation and for updating TraceWin. After the update, I checked the positions of diagnostic No. 212 (element No. 46): PAR_diag1.dat: 3.204084 m ENV_diag1.dat: 3.201630 m Data interface:3.201627 m Transfer_matrix1.dat:2.840500 m The Data interface now agrees with EN...

Dear Didier, I hope you are doing well. I am using TraceWin for beam dynamics simulations and have encountered some questions regarding the `SHIFT_IN_FIELD_MAP` command and transfer matrix extraction. I would appreciate your help in clarifying these issues. In my lattice file, some diagnostic elemen...

Dear Didier, ERROR_QUAD_xxxx_xxxx includes "Field map if defined as static magnetic field" in the manual. I defined quadrupoles and dipoles in 3D field map(geom for FIELD_MAP is 0070, i.e. static magnetic field), then how to define different error values for QUADs and BENDs? E.g. φz for QUADs is 1 m...

Dear Didier,

I noticed a failure case for phase advance matching command DIAG_PHASE_ADV.

Seems it only works for X phase advance, but not for Y plane.

I attach my project file. Please help to check it.
Kinds,
Shliu

Dear Didier,

Thank you for the detailed explanation.

Kinds,
shliu

Finally, it works well now. Thank you very much!

I notice that it runs much slower in the first 0.1/0.25/0.5 meters comparing with downstream running, so are there any special considerations on that?
BTW, what's the boundary of the input distribution for divergence and dp/p?

Kinds,
shliu

Dear Didier,

I edit it in the last reply. I still attach it here.
Kinds,
shliu

Dear Didier,

Thank you for the upgration and it works now with the option "Losses in FIELD_MAP" checked.

I tried another input distribution () with larger divergence and an error comes out saying that "Part of the beam distribution never reaches the end of the field map!"

Dear Didier,

Thank you for your effort to solve the problem. I'll continue to follow it up and hope there would be a solution next week.

Kinds,
shliu