Langmuir probe measurements in an expanding magnetized plasma

Langmuir probe measurements were performed in magnetized expanding plasmas of different compns. Under the assumption that a function fitted to results in argon is valid in other plasmas, it is possible to study the influence of the magnetic field in nitrogen and hydrogen plasmas. The electron d. in nitrogen can be increased by a factor of 10 by the application of a magnetic field of 4.5 mT. In hydrogen the d. can be increased by a factor of 100 by a magnetic field of 20 mT. The dominant ionic species in the magnetized nitrogen and hydrogen plasmas is the at. ion (N+ and H+, resp.). [on SciFinder (R)

Langmuir probe measurements in expanding magnetized argon, nitrogen and hydrogen plasmas

Langmuir probe measurements are performed in magnetized expanding plasmas of different eompositions. The influence of the magnetic field on the currents collected by the probe in an argon plasma is investigated at two different flows and for two different probe sizes. The experimental results are compared to existing theories. The theoretically predicted dependence of the ratio of electron to ion saturation current on probe diameter is not observed. An empirically derived function is fitted to the data. Under the assumption that the function fitted to the results in argon is valid for other plasmas, it is possible to determine relative ion densities in magnetized nitrogen and hydrogen plasmas. It is found that the dominant ionic species in both plasmas is the atomic ion (N+ and H+. respectively)

Langmuir probe measurements in an expanding magnetized plasma

Langmuir probe measurements were performed in magnetized expanding plasmas of different compns. Under the assumption that a function fitted to results in argon is valid in other plasmas, it is possible to study the influence of the magnetic field in nitrogen and hydrogen plasmas. The electron d. in nitrogen can be increased by a factor of 10 by the application of a magnetic field of 4.5 mT. In hydrogen the d. can be increased by a factor of 100 by a magnetic field of 20 mT. The dominant ionic species in the magnetized nitrogen and hydrogen plasmas is the at. ion (N+ and H+, resp.). [on SciFinder (R)