Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Many-Objective Beam Dynamics Optimization for High-Repetition-Rate XFEL
  Photoinjector   SHINE, as the first hard x-ray free-electron-laser (FEL) facility in China,
is designed to provide high-brightness FEL lasing under high-repetition-rate
operation mode. In order to drive x-ray FEL pulses with high qualities, the
photoinjector section is deployed to provide the specified electron beam with
low transverse emittance and high brightness. Normally the multi-objective
optimization algorithm is employed in the injector beam dynamics design. In
this paper, the many-objective optimization algorithm NSGA-III is introduced to
the injector physical design for optimizing the 4 beam quality properties for
the first time. The results of the optimization are presented and analyzed. The
application of NSGA-III can provide guidance for further physical research as
well as improve the beam dynamics optimization efficiency.

23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci