Parameters optimization considering intra-beam scattering in HALF lattice design

Chuwen Luo; Gangwen Liu; Weiwei Li; Nan Hu; Weimin Li; Zhenghe Bai; Lin Wang

doi:10.11884/HPLPB202234.220140

Journals >High Power Laser and Particle Beams >Volume 34 >Issue 10 >Page 104005 > Article

High Power Laser and Particle Beams
Vol. 34, Issue 10, 104005 (2022)

Parameters optimization considering intra-beam scattering in HALF lattice design

Chuwen Luo, Gangwen Liu, Weiwei Li, Nan Hu, Weimin Li, Zhenghe Bai, and Lin Wang^*

Author Affiliations

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China

show less

DOI: 10.11884/HPLPB202234.220140 Cite this Article

Chuwen Luo, Gangwen Liu, Weiwei Li, Nan Hu, Weimin Li, Zhenghe Bai, Lin Wang. Parameters optimization considering intra-beam scattering in HALF lattice design[J]. High Power Laser and Particle Beams, 2022, 34(10): 104005 Copy Citation Text

show less

Fig. 1. Magnet layout and linear optical functions of one period 7BA lattice

Download full size | View in the Article

Fig. 2. Change of emittance and emittance growth rate with natural emittance

Download full size | View in the Article

Fig. 3. Equilibrium emittance vs SR damping time

Download full size | View in the Article

Fig. 4. Parameter optimization of storage ring circumference

Download full size | View in the Article

Fig. 5. Magnet layout and linear optical functions of one period 6BAlattice

Download full size | View in the Article

Fig. 6. Change of energy spread and horizontal emittance with beam current

Download full size | View in the Article

parameter	value
beam energy	2.4 GeV
circumference	672 m
natural emittance	24.7 pm·rad
tune (H, V)	71.30, 23.30
natural chromaticity (H, V)	−97, −110
momentum compaction factor	5×10⁻⁵
natural energy spread	7.97×10⁻⁴
natural damping time (H, V, L)	(37.7,58.8,40.8) ms
energy loss per turn	182.9 keV
RF frequency	500 MHz

Table 1. Main parameters of the 7BA storage ring

$ \kappa /\mathrm{{\text{%}}} $	$ {\varepsilon }_{0} $/(pm·rad)	$ \mathrm{\varepsilon } $/(pm·rad)	$ {\sigma }_{\mathrm{p}0}/{10}^{-4} $	$ {\sigma }_{\mathrm{p}}/{10}^{-4} $	$ {\varepsilon }_{{x}0} $/(pm·rad)	$ {\varepsilon }_{{x}} $/(pm·rad)	$ ({\varepsilon }_{{x}}-{\varepsilon }_{{x}0})/{\varepsilon }_{{x}0} $
10	24.7	98.4	7.97	11.5	23.2	92.5	2.99
100	24.7	77.7	7.97	10.5	15.0	47.3	2.15

Table 2. Equilibrium emittance of the storage ring under IBS effects

parameter	value
beam energy	2.2 GeV
circumference	480 m
natural emittance	85.1 pm·rad
tune (H, V)	48.175,17.175
natural chromaticity (H, V)	−75, −59
momentum compaction factor	6.3×10⁻⁵
natural energy spread	6.6×10⁻⁴
damping time (H, V, L)	(22, 32.4, 21.2) ms
energy loss per turn	217.5 keV
RF frequency	500 MHz

Table 3. Main parameters of the 6BA storage ring

$ \kappa /\mathrm{{\text{%}}} $	$ {\varepsilon }_{0} $/(pm·rad)	$ \mathrm{\varepsilon } $/(pm·rad)	$ {\sigma }_{\mathrm{p}0}/{10}^{-4} $	$ {\sigma }_{\mathrm{p}}/{10}^{-4} $	$ {\varepsilon }_{x0} $/(pm·rad)	$ {\varepsilon }_{x} $/(pm·rad)	$ ({\varepsilon }_{x}-{\varepsilon }_{x0})/{\varepsilon }_{x0} $
10	85.1	185.4	6.6	9.19	79.6	173.4	1.178
100	85.1	153.4	6.6	8.35	50.2	90.5	0.803

Table 4. Equilibrium emittance of the HALF storage ring under IBS effects

$ \kappa /\mathrm{{\text{%}}} $	$ {\varepsilon }_{0} $/(pm·rad)	$ \mathrm{\varepsilon } $/(pm·rad)	$ {\sigma }_{\mathrm{p}0}/{10}^{-4} $	$ {\sigma }_{\mathrm{p}}/{10}^{-4} $	$ {\varepsilon }_{x0} $/(pm·rad)	$ {\varepsilon }_{x} $/(pm·rad)	$ ({\varepsilon }_{x}-{\varepsilon }_{x0})/{\varepsilon }_{x0} $
10	84.2	129	6.94	7.98	78.5	120.3	0.53
100	84.2	110.5	6.94	7.56	48.6	63.8	0.31

Table 5. Equilibrium emittance of the HALF storage ring under IBS effects

Download Citation

Save the article for my favorites

Paper Information