Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison and Analysis of Twist Pitch Length Test Methods for ITER
  Nb3Sn and NbTi Strands   A twisted multifilamentary structure is needed for Nb3Sn and NbTi strands to
be used in the International Thermonuclear Experimental Reactor (ITER) magnets.
As important parameters for the superconducting strands design and production,
the twist pitch length and direction of strands must meet the requirements
according to ITER Procurement Arrangement (PA) and this must be verified. The
technical requirements are 15mm+/-2mm for twist pitch length and right hand
twist for direction. The strand twist pitch and the twist direction can be
measured on straight sections of strand, which is recognized by the repetition
of filament bundles or by the angle of the filaments. Several test methods and
results are described and compared in this paper. The accuracy, uncertainty and
feasibility of different methods are analyzed and recommended measurement
methods are proposed for ITER strands verification.

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The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex