Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Floating zone furnace equipped with a high power laser of 1kW composed
  of five smart beams   A floating zone furnace is a powerful tool for single crystal growth. Here,
we report the floating zone furnace using a high power diode laser of 1kW
composed of five 200 Watt heating beams. The five beams with the designed
irradiation intensity distribution enable the melt-growth of single crystals
for refractory materials having a high melting temperature above 2000{\deg}C,
volatile materials and even incongruent materials. The power of five beams in
the horizontal plane provides uniform intensity in the outer circumference of
the raw material rods, while the vertical direction power of five beams can be
made to have a bell shape irradiation intensity so as to relax residual thermal
stress in the grown single crystal. The present furnace enables one to directly
monitor the temperature of the hot spot of raw material and the molten zone
within a 1 mm diameter. Such an in-situ monitoring function of the temperature
on the molten zone greatly enhances the controllability for optimizing the
crystal growth condition.

20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
3
The categories of this paper are: physics