[BTeam] Designing round beam lattice for electron storage rings with SLIM

[Jay Benesch]

https://arxiv.org/abs/2110.11157

Designing round beam lattice for electron storage rings with SLIM
Yongjun Li, Robert Rainer

     In the light source community, a round beam rather than a flat one 
is preferable for many beamline users. A conventional method of shifting 
machine's tune close to a difference resonance to obtain approximately 
round beams is usually analyzed with perturbation theories. In this 
paper, we adopt the Solution by LInear Matrices (SLIM) analysis to 
exactly calculate beam sizes when the linear coupling is present. The 
SLIM analysis can deal with a generally linearly coupled accelerator 
lattice, and the effects of various coupling sources on beam emittances 
and sizes are studied within a self-consistent frame. Both the on- and 
off-resonance schemes to obtain round beams are explained with examples. 
The formalism for two magnet models, combined-function bending magnets, 
planar wigglers and undulators, which are widely used on light source 
storage rings, are derived.

Comments: 	9 pages, 13 figures
Subjects: 	Accelerator Physics (physics.acc-ph)
Cite as: 	arXiv:2110.11157 [physics.acc-ph]

The work here by Lebedev and Bogacz is cited on page one. The method is 
due to Alex Chao.