Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theoretical analysis of BLM system for HLS II   Hefei Light Source (HLS) is being upgraded to HLS II. Its emittance will be
much lower than before, therefore the Touschek scattering will increase
significantly and become the dominant factor of beam loss. So it is necessary
to build a new beam loss monitoring (BLM) system differed from the old one to
obtain the quantity and position information of lost electrons. This
information is useful in the commissioning, troubleshooting and beam lifetime
studying for HLS II. This paper analyzes the distribution features of different
kinds of lost electrons, introduces the new machine's operation parameters and
discusses the way to choose proper monitoring positions. Base on these
comprehensive analysis, a new BLM system for HLS II is proposed.

25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph