Elegant users forum

Halo Michael,

I am working on a magnetic arc and want to compress the beam from an initial bunch length of 4 ps to 2 ps and initial sigma_s = 1e-3. I have particle_distribution.sdds, and I want to add chirp and then optimize R56. I am asking how to add chirp if I am using &sdds_beam, not &bunched_beam. I attached the lattice file and particle_dis.sdds. Another question, can I optimize both chrip and R56 to get a 2 ps bunch length?

Best regards
Esraa

Esraa,

You can add a chirp (R65 nonzero) and compression (R56 nonzero) using EMATRIX elements. Please see attached files for an example

When optimizing both the chirp and R56, you'll want to place reasonable limits on the maximum allowable energy spread and R56.

--Michael