Low-electron-temperature ECR plasma with high electron density was realized
under the mirror magnetic field configuration in the H-2 and the Ar/N-2 pl
asma. Especially, the electron temperature was observed to be less than 2 e
V in the Ar/N-2 plasma. it was found from the calculation of particle and p
ower balance in steady state that the decrease in the electron temperature
observed in the Ar/N-2 plasma was due to the effect of the magnetic-mirror
confinement of the N-2 plasma. Furthermore, our calculated results suggest
that the effect of magnetic-mirror on the decrease in the electron temperat
ure depends on the collisional cross section between electrons and neutral
particles. (C) 2001 Elsevier Science B.V. All rights reserved.