Bulletin of the American Physical Society
75th Annual Gaseous Electronics Conference
Monday–Friday, October 3–7, 2022;
Sendai International Center, Sendai, Japan
The session times in this program are intended for Japan Standard Time zone in Tokyo, Japan (GMT+9)
Session HT4: Poster Session I (4:00-6:00pm, JST)
Tuesday, October 4, 2022
Sendai International Center Room: Sakura 1
Abstract: HT4.00011 : Intermittent variation of electron temperature in converging field following a magnetic beach ECR plasma source*
Experiments were performed using a linear plasma device NUMBER. A 2.45 GHz microwave injected from an end of chamber produces helium plasma by the electron cyclotron resonance in the magnetic beach configuration, B < 0.1 T. The plasma expands along the magnetic field into a higher field test region up to 0.3 T. Electron temperature is obtained from current - voltage characteristics of Langmuir probe using conditional sampling triggered by negative spike in floating potential monitored by another probe.
Electron temperature rising of 2 - 10 eV is observed during negative spikes in floating potential. Cross correlation coefficients between two floating potentials measured at different position indicate correlation along the field line.
*This work was supported by JSPS KAKENHI Grant Nos. JP19H01869, JP20H01883 and the NIFS collaboration research program, Grant No. NIFS22KIIP008.
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