The OPAL Discussion Forum

["Kuske, Bettina" <bettina.kuske AT helmholtz-berlin.de>]

Hi Chris,

Christoph Metzger-Kraus is the one to answer your question,  but he is on vacation. As far as I understand this is exactly the improvement in opal3D. There are local coordinate systems for each element that allow for rotation or the like and global ones, that keep the path. Try to find a way with Christof to get opal3D set up until it is officially released. Actually, as we already said in Geneva ;-).

I'm happy to see your interest in opal!

Bettina

Von Samsung Mobile gesendet

-------- Ursprüngliche Nachricht --------

Von: "Dr. Christopher Mayes"

Datum:27.07.2017 00:53 (GMT+01:00)

An: opal AT lists.psi.ch

Betreff: [Opal] SBend tilt (psi) convention in OPAL-T

Hi OPAL developers,

In MAD and Bmad, the convention of a tilted bend is to rotate the coordinates at the beginning, and the exit, of a horizontal bend. The result is that a purely vertical bend will keep the ‘y’ axis pointing in the same plane. This is also consistent with how other elements are tracked: a tilted quad does not tilt the pipe downstream. 

In OPAL-T, it seems that the rotation (set by ‘psi’) is at the beginning of the bend, but not undone. Is it possible to make this more in line with MAD and Bmad? 

Thanks,

Chris

________________________________
Dr. Christopher Mayes
+1 607 222 5922
cmayes AT stanford.edu

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