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African Journal of Educational Studies in Mathematics and Sciences

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Determination of electron temperature and electron density in laboratory plasmas using the double probe method

M Gasseller, AV Gholap

Abstract


The electron temperatures and electron densities of air and argon have been measured at various pds (pressure times distance). The electron temperatures have been computed using the Johnson-Malter double-probe method. The electron densities have been computed using the total positive ion current and the cross-sectional area of the probes. It is seen that the electron temperature increases from 5.8 × 102 oK to 7.83 × 104 oK as the pd is reduced from 130mm Hg × mm to 60 mm Hg × mm for argon. The electron densities increases from 2.8 × 1011/cm3 to 3.2 × 1011 /cm3 for the same variation of pds. For air the electron temperature increases from 3.6 × 104 oK to 7.80 × 104 oK as the pd is reduced from 130 mm Hg × mm to 60 mm Hg × mm. The electron density increases from 4.4 × 1011 /cm3 to 6.3 × 1011 /cm3 for the same variation of pd.

African Journal of Educational Studies in Mathematics and Sciences Vol. 1, 2001: 1-11



http://dx.doi.org/10.4314/ajesms.v1i1.38572
AJOL African Journals Online