Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Whistler wave plasma production in CHS   Rf plasma production in Whistler waves range of frequency f/fci >1 is applied
on the compact helical system (CHS) in a steady state operation with low
toroidal magnetic field strength, where f and fci are rf and ion cyclotron
frequencies, respectively. Maximum rf power and pulse width are is170kW and 10
msec at 9MHz, respectively. The line averaged plasma density <ne> as high as
2x10^18 m-3 (He plasma) is produced in the region of toroidal magnetic field
strength on magnetic axis B=100G~1.5kG and the electron temperature measured at
plasma periphery is about 20eV. The wave magnetic field strength measured at
the plasma periphery showed the evidence of the toroidal eigen modes of the
Whistler waves. The additional long pulse microwave heating of 2.45GHz
(>200msec) is applied and it sustains the plasmas while the microwave itself
can not ignite plasmas when B<600G.

27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
18
The categories of this paper are: econ