Elegant users forum

Hi, I am evaluating a quad scan I recently did using sddsemitproc and I have a small question that goes into the same direction as this post. I used a quadruple triplet in which the outer two quads have the same current supply, hence same K. When I use sddscollapse and sddsxref with my experimental ...

Hi Michael, I'll just divide the field file since it doesn't vary with z over the most part. That's easy. I just thought i did something wrong. By the way is there any way to input a functional field? It has a very easy formula since it is radially symmetric and it would make things much easier. I'v...

Hi Micheal, thanks again for the help. I used FTABLE with the old input some more and simulated passage through a radially symmetric field. The field is 15mm long (z), and 250µm by 250µm (x and y). It gives the expected results except for a kick at the end of the lens. I plotted s1 over s from my .s...

Hi Michael,

I installed 30.0.0 and saw the changes to FTABLE. It says it's the same format as BMXYZ but I couldn't find a forum entry or example case for that. Did I miss it? I think it would help me alot to see the formatting in an example.

Best,
Jan

Hi Michael, I tried to get rid of all errors by using your quad-test example and carefully recalculating my ftable ;) It now produces results which look as expected. See the attached plot. Ideal is an ftable file of an ideal plasma lens and MHD is a nonlinear plasma lens. Some particles don't het th...

Hi Michael, thanks for your help. I updated to 29.1.0 and it works for examples and a field map my college made out of measurement data from a quadrupole. However when I plug in my field table I get the error: error: rho = 0 in choose_theta (FTABLE). Seek expert help. It seems something in my ftable...

Hello Michael, I tried using your example for an ftable quad. It doesn't work for me and it gives the following error: >tracking 121 particles >24 Jun 16 11:42:42: This step establishes energy profile vs s (fiducial beam). >24 Jun 16 11:42:42: Rf phases/references reset. >error: Initialize FTABLE: T...