Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Challenge of Plasma Heating with the JET Metallic Wall   The major aspects linked to the use of the JET auxiliary heating systems:
NBI, ICRF and LHCD, in the new JET ITER-like wall (JET-ILW) are presented. We
show that although there were issues related to the operation of each system,
efficient and safe plasma heating was obtained with room for higher power. For
the NBI up to 25.7MW was safely injected; issues that had to be tackled were
mainly the beam shine-through and beam re-ionisation before its entrance into
the plasma. For the ICRF system, 5MW were coupled in L-mode and 4MW in H-mode;
the main areas of concern were RF-sheaths related heat loads and impurities
production. For the LH, 2.5 MW were delivered without problems; arcing and
generation of fast electron beams in front of the launcher that can lead to
high heat loads were the keys issues. For each system, an overview will be
given of: the main modifications implemented for safe use, their compatibility
with the new metallic wall, the differences in behavior compared with the
previous carbon wall, with emphasis on heat loads and impurity content in the
plasma.

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The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ