Behaviour of Runaway Electrons During Ohmic Discharges in the Heliotron D Device

Shoji Yoshioka

doi:10.1541/ieejfms1972.103.451

Shoji Yoshioka

著者情報

ジャーナルフリー

1983 年 103 巻 8 号 p. 451-458

DOI https://doi.org/10.1541/ieejfms1972.103.451

詳細

Published: 1983/08/20 Received: 1982/10/18 Available on J-STAGE: 2008/06/30 Accepted: - Advance online publication: - Revised: -
訂正情報
訂正日: 2008/06/30 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : The behaviour of runaway electrons during ohmic discharges accompanied by a strong hard
X-ray emission in the Heliotron D device is preliminarily studied. The time evolution of the
discharge parameters and the spatial distributions of the hard X-ray emission are investigated
in a runaway discharge mode; electron temperature Te=10eV, average density ne=3×10¹²
cm^-3 and ohmic current IOH<2kA, the current safety factor greater than three. The
followings are found: a major part of the runaway electrons is produced at the current rise
stage of the discharges and lost at the fall stage, causing the hard X-ray emission and/or the
plasma heating accompanied with an instability. The maximum energy of the runaway
electrons observed is several hundreds keV and the density is estimated of the order of 10¹⁰
cm^-3. The runaway electrons are strongly concentrated at the plasma peripheral region.
Right : The behaviour of runaway electrons during ohmic discharges accompanied by a strong hard X-ray emission in the Heliotron D device is preliminarily studied. The time evolution of the discharge parameters and the spatial distributions of the hard X-ray emission are investigated in a runaway discharge mode; electron temperature Te=10eV, average density ne=3×10¹²cm^-3 and ohmic current IOH<2kA, the current safety factor greater than three. The followings are found: a major part of the runaway electrons is produced at the current rise stage of the discharges and lost at the fall stage, causing the hard X-ray emission and/or the plasma heating accompanied with an instability. The maximum energy of the runaway electrons observed is several hundreds keV and the density is estimated of the order of 10¹⁰cm^-3. The runaway electrons are strongly concentrated at the plasma peripheral region.

訂正日: 2008/06/30 訂正理由: - 訂正箇所: PDFファイル訂正内容: -

抄録

The behaviour of runaway electrons during ohmic discharges accompanied by a strong hard X-ray emission in the Heliotron D device is preliminarily studied. The time evolution of the discharge parameters and the spatial distributions of the hard X-ray emission are investigated in a runaway discharge mode; electron temperature Te=10eV, average density ne=3×10¹²cm^-3 and ohmic current IOH<2kA, the current safety factor greater than three. The followings are found: a major part of the runaway electrons is produced at the current rise stage of the discharges and lost at the fall stage, causing the hard X-ray emission and/or the plasma heating accompanied with an instability. The maximum energy of the runaway electrons observed is several hundreds keV and the density is estimated of the order of 10¹⁰cm^-3. The runaway electrons are strongly concentrated at the plasma peripheral region.

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