Elegant users forum

Dear Michael,

I am wondering if Touschek lifetime calculation in Elegant depends on the aperture as I added two scrapers and undulator with 3.5 mm gap but I got almost the same Touschek lifetime (about 60 hours) for the bare lattice.
Here is my files if you can kindly take a look.

Many thanks in advance and best regards,
Samira

Samira,

Yes, apertures will be included in the Touschek lifetime calculations via the local momentum acceptance. However, in your simulation you only added vertical apertures, plus you have no errors. In that case, it isn't surprising that the effect is small because of the lack of coupling of horizontal motion into the vertical plane.

--Michael