Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gas Analyses of First complete JET Cryopump Regeneration with ITER-Like
  Wall   Analytical results of a complete JET cryopump regeneration, including the
nitrogen panel, following the first ITER-Like Wall campaign are presented along
with the in-situ analyses of residual gas. H/D mixtures and impurities such as
nitrogen and neon were injected during plasma operation in the vessel to study
radiation cooling in the scrape-off-layer and divertor region. The global gas
inventory over the campaign is incomplete, suggesting residual volatile
impurities are remaining on the cryogenic panel. This paper presents results on
a) residual deuterium on the panel which is related to the campaign very low,
b) impurities like nitrogen which sticks on the panel and c) the ammonia
production which can be observed in the RGA spectrum.

27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys