  In this work, the influence of crossed magnetic fields (B=100 Gauss) on the
UV-vis and NIR spectra and breakdown voltages of nitrogen and oxygen at a pair
of parallel plane copper electrodes with a spacing d=2 cm and diameter R= 2.2
cm are studied. Working pressures of the gases are kept between 0.1 and 1 Torr.
The breakdown voltage measurements across the electrodes are conducted by
Tektronix P6015 high voltage probe connected to a Tektronix 2430A oscilloscope.
The Spectra of discharge plasmas in the absence and presence of magnetic fields
are recorded between 200-1100 nm. by AvaSpec-ULS3648. In order to analyse
observed spectra of nitrogen and oxygen plasmas, one of the pattern recognition
techniques of principal component analysis has been employed. Results of
principal component analysis shows that the presence of magnetic field cause
the plasma particles to move in condensed way for the oxygen but not for the
nitrogen. Principal component spectra shows that small amount of the cross
magnetic field results in the Stokes linear polarization of the most of the
oxygen and NIII (337 nm) of the Nitrogen species in the plasmas. The non-local
thermal equilibrium based spectroscopic modeling of nitrogen and oxygen plasma
gives that the electron temperature of nitrogen and oxygen are Te=25000 and
5000 Kelvin respectively.
