Elegant users forum

Hi Michael, Thank your suggestion. Here is the result. 1. Assign an HGAP value for the dipoles to get the soft edge effects. - Done, no significant difference was found between using hard-edge and soft-edge. 2. In the &correct namelist, assign n_iterations=3 and n_xy_cycles=3 to give more assurance ...

Michael, Thank for your help. I am close to the final answer. What I am doing is to simulate the existence of stored beam for the top-off safety when: (1) a single dipole (NIBEND) is being shorted gradually, (2) the closed orbit correction is still functioning, but the corrector strength is limited ...

Hi Michael, Thank you for help. I have some more questions related to orbit correction. 1) dipole's FSE: if a dipole is shorted, the actual bending angle and the path-length can NOT be scaled by FSE, the real trajectory depends on dipole fringe angle (like SBEND, or RBEND ) . And if the dipole has s...

Yongjun, How are you checking the path-length? It needs to be done by tracking. E.g., you can track one turn and look at the "Cs" parameter in the "final" output file (&run_setup final=...). --Michael Hi Michael, I tried the one turn track, then look at the Cs, but it only display 6 numbers after d...

Hi Michael, I printed out the parameters in the %s.orb: ( it works when I set the option to be a nonzero) sddsprintout -par test.orb here is output: ----------------------(fixed_length = nonzero) Printout for SDDS file test.orb Step = 0 xError (m) = -9.177912e-13 yError (m) = 0.000000e+00 delta = -2...

Hi Michael, The command "closed orbit" has an option "fixed_length", which can find a closed orbit with the same length as the design orbit by changing the momentum offset. First I set this option to be a nonzero, then I introduced a kicker and calculated the closed orbit path-length and beam energy...