Elegant users forum

Dear Michael,

In practice, is it necessary to add special skew quads(how many) for coupling to obtain a round beam? If adding a special skew quad, where is it at APS storage ring, in straight section or somewhere?

Thank you,

Chongchong

Dear Michael, Thank you for your suggestion, and I follow your example. Question 1：Theoretically, e1=e2=(e10+e20)/2=17.5 pm when I tune the lattice to the difference resonance(where e10 and e20 are initial emittance respectively). But the results (Fig.1) show that e1=e2=23pm. Could you help me solve...

Hi all, I am correcting the tune to realize the difference resonance (equal fractional betatron tunes)in order to obtain a round beam(emittance x is equal to emittance y) in a coupling lattice, and TWO quad families (Q1,Q2) that correct tunes is recommended. "&correct_tunes " should follow "&twiss_o...

Dear Michael, According to your suggestion, I used the moments_output command in elegant to find the three actual emittances. e1 (m) = 3.420662e-11 e2 (m) = 5.694252e-17 e3 (m) = 5.261045e-06 And I put in several watch elements at different locations, the results are not all the same. Theoretically,...

Dear all, I changed betatron tunes to realize the difference resonance (equal fractional betatron tunes)in order to obtain a round beam(emittance x is equal to emittance y). I used "WATCH" to record the data of emittance x and emittance y for tracking particles in the elegant. But the statistical re...

Dear Michael and others, I changed betatron tunes to realize the difference resonance (equal fractional betatron tunes)in order to obtain a round beam. I used "WATCH" to record the data of emittance x and emittance y for tracking particles in the elegant. But the statistical results show that emitta...

If we were removing rf cavities and synchrotron radiation, using a beam with no energy spread (to keep fixed bunch length),
how could I accurately count the emittance caused by space-charge effect?