On impurity handling in high performance stellarator/heliotron plasmas
On impurity handling in high performance stellarator/heliotron plasmas
复制标题
高性能仿星器/日光管等离子体中的杂质处理
DOI:
10.1088/0029-5515/49/6/065005
复制
发表时间:
2009
期刊:
影响因子:
3.3
通讯作者:
B. Zurro
中科院分区:
文献类型:
--
作者:
R. Burhenn;Y. Feng;K. Ida;H. Maassberg;K. McCarthy;D. Kalinina;M. Kobayashi;S. Morita;Y. Nakamura;H. Nozato;S. Okamura;S. Sudo;C. Suzuki;N. Tamura;A. Weller;M. Yoshinuma;B. Zurro
The Large Helical Device (LHD) and Wendelstein 7-X (W7-X, under construction) are experiments specially designed to demonstrate long-pulse (quasi steady state) operation, which is an intrinsic property of stellarators and heliotrons. Significant progress has been made in establishing high performance plasmas. A crucial point is the increasing impurity confinement at high density observed at several machines (TJ-II, W7-AS, LHD) which can lead to impurity accumulation and early pulse termination by radiation collapse. In addition, theoretical predictions for non-axisymmetric configurations predict the absence of impurity screening by ion temperature gradients in standard ion-root plasmas. Nevertheless, scenarios were found where impurity accumulation was successfully avoided in LHD and W7-AS due to the onset of friction forces in the (high density and low temperature) scrape-off-layer (SOL), the generation of magnetic islands at the plasma boundary and to a certain degree also by edge localized modes, flushing out impurities and reducing the net impurity influx into the core. In both the W7-AS high density H-mode regime and in the case of application of sufficient electron cyclotron radiation heating power a reduction in impurity core confinement was observed. The exploration of such purification mechanisms is a demanding task for successful steady-state operation. Impurity transport at the plasma edge/SOL was identified to play a major role for the global impurity behaviour in addition to the core confinement.
登录
查看更多内容
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
T. Notake;et al.;尾崎 哲;田村 直樹
通讯作者:
田村 直樹
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
H.;Furukawa;プラズマ核融合学会;Makoto Otsuki;関根 勉;Tsutomu SEKINE;関根 勉;Tsutomu SEKINE;関根 勉;関根 勉;Tsutomu SEKINE;鈴木 千尋;C. Suzuki;鈴木 千尋;C. Suzuki;田村 直樹;鈴木 千尋;N. Tamura
通讯作者:
N. Tamura
影响因子:
3.3
作者:
K. Ida;M. Yoshinuma;M. Yokoyama;S. Inagaki;N. Tamura;B. Peterson;T. Morisaki;S. Masuzaki;A. Komori;Y. Nagayama;K. Tanaka;K. Narihara;K. Watanabe;C. Beidler
通讯作者:
K. Ida;M. Yoshinuma;M. Yokoyama;S. Inagaki;N. Tamura;B. Peterson;T. Morisaki;S. Masuzaki;A. Komori;Y. Nagayama;K. Tanaka;K. Narihara;K. Watanabe;C. Beidler
DOI:
--
发表时间:
2006
期刊:
Plasma Science & Technology 8
影响因子:
--
作者:
T. Nakazato;T. Odagiri;K. Yachi;L. Ishikawa;H. Fukuzawa;H. Miyagi;M. Kitajima;and N. Kouchi;R.Katai;S.Muto;S.Morita
通讯作者:
S.Morita
DOI:
--
发表时间:
2003
期刊:
Nuclear Fusion Vol.43, No.4
影响因子:
--
作者:
Y.Nakamura;Y.Takeiri;R.Kumazawa;M.Osakabe;et al.
通讯作者:
et al.