Elegant users forum

The main difference is the direction in which the beam is circulating. I believe Elegant uses a system where s = x cross y, with cross meaning the vector cross product. Bengtsson uses in his article y = x cross s, which is the result of the Fresnet-Serret coordinate system. This difference in the de...

After reading back again Bengtsson I just saw that Bengtsson prefers to derive the equations in a left handed coordinate system, which explains the sign difference between the article equations and the Elegant code.

The code is correct. I leave here below and extract from Bengtsson's article.

Here are the notes I mentioned in the previous post.

o

Dear Michail, thank you for checking the results. I don't have right now any other reason to think it is wrong. Before starting this post I derived on my own the term in Eq. (8) and I got the same result that Chun-xi wrote on his paper, and on the way I confirmed the order of the sum is consistent. ...

Dear all, I have a doubt about the summation used in the calculation of the second order rdts with respect to sextupoles. I see that in the elegant file 'twiss.cc' line 4997 the sign of the sum is written as termSign = SIGN(ed[iE].s - ed[jE].s); which is negative for j>i, being j downstream wrt to i...

Dear Soliday,
thank you for your help. I finally suceed compiling all except oag/apps/src/utils because of the missing gsl library I mentioned before.
This discussion could be closed.
Best regards,
o

Dear Soliday,
few years ago I wanted to have sddsedit working on linux and in order to compile it I needed the whole epics base.
This might indeed not longer be the case, I will try without epics and with the new epics base on your link.

Dear Soliday, it was my mistake. I was missing the epics.base.configure file. Now I have it and the compilation stops at cadef.h. Do you have any suggestion ? make[1]: Entering directory '/home/oblanco/Documents/public/progs/elegant/2023.4/elegant_compilation/epics/extensions/src/oagca/O.linux-x86_6...

Dear Soliday,
alright. It might be a component in epics base that I compiled without knowing it was not necessary just because it is in the epics base Makefile. I will try to do it with the epics version distributed with elegant.

Best regards,
o

Dear all, I've been trying to compile the SDDS tools using SDDSbase 7.0.8 on a Debian 12 machine and I get the following error. Is there any variable that should be configured differently on Debian? ... Installing script ../../../../bin/linux-x86_64/hpVecRestore Installing script ../../../../bin/lin...