Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long-lived filaments in fusion plasmas: review of observations and
  status of hypothesis of microdust-assembled skeletons   A brief review is given of the progress in studying the long-lived filaments
(LLFs) in fusion plasmas (tokamaks, Z-pinch, plasma focus). The paper reports
on (i) resolving the fine structure of LLFs, and (ii) verification of our
hypothesis (1998) which suggested the LLFs to possess a microsolid skeleton.
The recent proof-of-concept studies showed the presence of tubular and
cartwheel-like structures in (i) various dust deposits in tokamak T-10, in the
range 10 nm - 10 mcm, and (ii) visible light images of plasma, in the range 100
mcm - 10 cm, at initial stage of discharge (e.g., before appearance of
discharge electric current) in tokamak, plasma focus and vacuum spark. The
topological similarity of the above structures (especially, "cartwheels") and
the observed trend of assembling bigger tubules from smaller ones (i.e. the
self-similarity) allow to draw a bridge between the microdust skeletons in the
dust deposits and the centimeter scale LLFs in fusion plasmas.

14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg