Elegant users forum

Hi Michael,
I add a small vertical dispersion bump (several CSBEND elements with TILT=pi/2) in a ring and put a horizontal wiggler to this vertical dispersion bump. I try to use &moments_output to evaluate the equilibrium vertical emittance. Should I include classical, single-particle synchrotron radiation in wiggler to get accurate values? I found that when I included it, the emittance increased a lot.
--Weihang

Weihang,

You should be able to get valid results with WIGGLER or CWIGGLER. The former should work automatically, whereas for the latter you need to set SYNCH_RAD=1 and ISR=1 on the element. Of course, you need SYNCH_RAD=1 and ISR=1 on any CCBEND, CSBEND, KQUAD, and KSEXT elements as well.

If problems continue, post a lattice and I'll look in more detail.

--Michael