Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New Revelation of Lightning Ball Observation and Proposal for a Nuclear
  Reactor Fusion Experiment   In this paper, the author brings further details regarding his Lightning Ball
observation that were not mentioned in the first one (Ref.1-2). Additionally,
he goes more into detail as the three forces that are necessary to allow the
residual crescent form the hydrodynamic vortex ring to shrink into a
sphere.Further topics are the similarities and analogies between the Lightning
Ball formation's theory and the presently undertaken
Tokamak-Stellarator-Spheromak fusion reactor experiments. A new theory and its
experimental realisation are proposed as to make the shrinking of the hot
plasma of reactors into a ball possible by means of the so called long range
electromagnetic forces. In this way,the fusion ignition temperature could
possibly atteined.

33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio