Observation of high-temperature bubbles in an ECR plasma

K. Terasaka, S. Yoshimura, M. Y. Tanaka

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Creation and annihilation of high-temperature bubbles have been observed in an electron cyclotron resonance plasma. The electron temperature in the bubble core is three times higher than that in the ambient region, and the size perpendicular to the magnetic field is much smaller than the plasma diameter. Formation of a bubble accompanies large negative spikes in the floating potential of a Langmuir probe, and the spatiotemporal behavior of the bubble has been visualized with a high-impedance wire grid detector. It is found that the bubble is in a prolate spheroidal shape with the axis along the magnetic field and occurs randomly in time and independently in space.

Original languageEnglish
Article number052113
JournalPhysics of Plasmas
Issue number5
Publication statusPublished - May 1 2018

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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