Measurements of Oxygen Ion Spectra for Estimation of Electric Field Profiles in Cylindrical Plasmas

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概要

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• Electric field profiles play an important role in the improvement of plasma confinement. It is essential to develop techniques to measure the electric field profiles in each region of a fusion device. We have developed a technique to measure the electric field profiles in cylindrical plasmas by measuring the Doppler shift of the CII spectrum. Recently, we have developed a collisional-radiative model for the lower charge state of oxygen ions. The oxygen emissions are stronger than those of carbon in GAMMA 10. In order to achieve a higher resolution for the electric field measurements, the technique for measuring the electric field profiles was improved by using the measurements of the oxygen spectra and the calculation of the newly developed collisional-radiative model. The electric field profile was successfully obtained under the condition of a weak electric field.

• 社団法人 プラズマ・核融合学会の論文

著者

• Cho Teruji

  Plasma Research Center The University Of Tsukuba

• YOSHIKAWA Masayuki

  Plasma Research Center, University of Tsukuba

• Kubota Yuusuke

  Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan

• KOBAYASHI Takayuki

  Plasma Research Center, University of Tsukuba

• KOBAYASHI Takayuki

  Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan

• MATAMA Ken

  Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan

• NOTO Masamitsu

  Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan

• YOKOSHIMA Junichi

  Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan

• YOSHIKAWA Masayuki

  Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan

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