Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Outgassing properties of vacuum materials for particle accelerators   Gas load and pumping determine the quality of vacuum systems. In particle
accelerators, once leaks are excluded, outgassing of materials is an important
source of gas together with degassing induced by particle beams. Understanding,
predicting, and measuring gas release from materials in vacuum are among the
fundamental tasks of ultrahigh-vacuum experts. The knowledge of outgassing
phenomena is essential for the choice of materials and their treatments so that
the required gas density is achieved in such demanding and expensive scientific
instruments. This note provides the background to understand outgassing in
vacuum and gives references for further study.

37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an