DOCUMENT METADATA
SLAC Publication: SLAC-PUB-17337
SLAC Release Date: October 15, 2018
Numerical optimization of a low emittance lattice cell
Huang, Xiaobiao.
In the lattice designs for the next generation storage ring light sources, longitudinal
gradient bending magnets and anti-bending magnets have been adopted.
A logical question raised by the trend of varying the longitudinal distribution of dipole
strength is: what are the optimal distributions of the dipole and quadrupole fields
in a lattice cell for the purpose of minimizing the natural emittance?
We studied this problem by numerically optimizing
the dipole and quadrupole distributions o... Show Full Abstract
In the lattice designs for the next generation storage ring light sources, longitudinal
gradient bending magnets and anti-bending magnets have been adopted.
A logical question raised by the trend of varying the longitudinal distribution of dipole
strength is: what are the optimal distributions of the dipole and quadrupole fields
in a lattice cell for the purpose of minimizing the natural emittance?
We studied this problem by numerically optimizing
the dipole and quadrupole distributions of the normalized cell optics
using the particle swarm optimization algorithm.
The results reveal the features of the longitudinal field variation of the optimized
cell and show that when the quadrupole gradient is increased enough, the cell
tends to split into two identical cells with
similar features. Show Partial Abstract
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