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Probe Measurements in D. C. Plasma Jet

Memoirs of the Faculty of Engineering, Yamaguchi University Volume 17 Issue 3 Page 17-22
published_at 1966
KJ00000155575.pdf
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Title
直流プラズマ・ジェットに対する探針測定
Probe Measurements in D. C. Plasma Jet
Creators Maki Hajime
Creators Saeki Setsuo
Creators Osaki Katashi
Source Identifiers
Some preliminary experiments concerning high speed probe techniques has been undertaken in D. C. plasma jet. A conductivity probe, a typical Langumuir probe and velocity probe were used for the investigation at the surface layer of the high temperature jet core. When a probe is operated in high temperature plasma flow, it appears unlikely that the static theory of the probe method will be directly applicable. So, Clayden's assumptions were given for the interpretation of results from our experiments. Thus, apparent plasma conductivity, apparent electron temperatures and ion densities were estimated and the probe current wave form were studied. It was found that the electrical conductivity of plasma jet increased significantly with the arc current. Typical values of specific resistance were less than 300KΩ・cm which is equal to the resistance of the seeded Argon plasma. The results obtained from the measurements by the Langmuir probe and the velocity probe were as follows. The electron temperature were 6500°K for Nozzle N-2,12000°K for Nozzle N-5 and the ion densities were 4.08×10^<14>ions/cm^3 for N-5,9.91×10^<14>ions/cm^3 for N-11 respectively. A random pulse observed in the probe current vanished with the increase of the arc current.
Subjects
電気工学 ( Other)
Languages jpn
Resource Type departmental bulletin paper
Publishers 山口大学工学部
Date Issued 1966
File Version Version of Record
Access Rights open access
Relations
[ISSN]0372-7661
[NCID]AN00244228
Schools 工学部