High Power Laser and Particle Beams, Volume. 35, Issue 12, 124004(2023)
Optimization design of photocathode injector assisted by deep Gaussian process
Figures & Tables(10)
![Schematic diagram of multilayer structure of DeepGP model[14]](/Images/icon/loading.gif){kind=icon}
Fig. 2. Schematic diagram of multilayer structure of DeepGP model[14]
Fig. 4. Schematic diagram of the geometric structure of the electron gun
Fig. 5. Evolution of transverse RMS normalized emittance and longitudinal length
Fig. 6. Evolution of the normalized transverseemittance and longitudinal length of bunch
Fig. 7. Negative value of Hyper Volume fromNSGA-III with GP and DeepGP
Table 1. Range of geometric parameters
View tableView in ArticleTable 1. Range of geometric parameters
parameter unit range width of nose cm [0.5 , 1.5] radius of arc-1 cm [0.0 , 1.0] angle of arc-1 ° [0 , 90] radius of iris cm [3.0 , 5.0] width of iris cm [1.0 , 2.6] angle of arc-3 ° [30 , 90] radius of arc-3 cm [0.5,1.0] length of gun cm [27.0 , 36.0] width of gun cm [1.0 , 2.5] length of first cell cm [4.4 ,8.4] length of second cell cm [10 , 12] radius of first cell cm [8.5 , 9.5] radius of second cell cm [8.5,9.5] radius of arc-2 cm [0.5 , 2.0] angle of arc-2 ° 90 radius of arc-4 cm [0.5, 2.0] angle of arc-4 ° 90 radius of arc-5 cm [0.5,2.0] angle of arc-5 ° 30
Table 2. Beam element parameter range
View tableView in ArticleTable 2. Beam element parameter range
parameter unit range peak gun field MV/m [30 , 80] cavity phase ° [0 , 360] solenoid 1 peak field T [0.1 , 0.5] solenoid 1 position m [0.05, 0.2] solenoid 1 length m [0.05, 0.1] solenoid 2 peak field T [0.0 , 0.5] solenoid 2 length m [0.05, 0.15] solenoid 2 radius m [0.02 , 0.1] peak TWT field MV/m 30 TWT phase ° [0 , 360] TWT position m [0.02, 2.0]
Table 3. Main parameter values of a solution
View tableView in ArticleTable 3. Main parameter values of a solution
parameter unit range peak gun field MV/m 80 cavity phase ° 243 solenoid 1 peak field T 0.3 solenoid 1 position m 0.12 solenoid 2 peak field T 0.28 peak TWT field MV/m 30 TWT phase ° 104 TWT position m 0.6 radius of iris cm 4.9 width of iris cm 1.0 length of gun cm 24 width of gun cm 1.5 length of first cell cm 6.2 length of second cell cm 11.0 radius of first cell cm 9.11 radius of second cell cm 8.71
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Zheng Sun, Tianmu Xin. Optimization design of photocathode injector assisted by deep Gaussian process[J]. High Power Laser and Particle Beams, 2023, 35(12): 124004
Paper Information
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Received: Apr. 21, 2023
Accepted: Oct. 29, 2023
Published Online: Dec. 27, 2023
The Author Email: Xin Tianmu (xintm@ihep.ac.cn)
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