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FTU results with a liquid lithium limiter
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Mazzitelli, G., Apicella, M. L., Frigione, D., Maddaluno, G., Marinucci, M., Mazzotta, C., Pericoli Ridolfini, V., Romanelli, M. (Michele), Szepesi, Gabor and Tudisco, O. (2011) FTU results with a liquid lithium limiter. Nuclear Fusion, Vol.51 (No.7). 073006. doi:10.1088/0029-5515/51/7/073006 ISSN 0029-5515.
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Official URL: http://dx.doi.org/10.1088/0029-5515/51/7/073006
Abstract
Since the end of 2005 most of the plasma-wall interaction experiments on FTU have been focused on the possible use of liquid lithium as the plasma facing material. Liquid lithium limiter is an active method to deposit, during the plasma discharge, a lithium film on the walls with prolonged beneficial effects. Reliable operation with very clean plasmas, very low wall particle recycling, spontaneous peaking of the density profile for line-averaged density values (n) over bar (e) > 1.0 x 10(20) m(-3) have been obtained. These results have allowed us to extend the density limit to the highest value so far obtained ((n) over bar (e) = 4.0 x 10(20) m(-3) at I(p) = 0.7MA and B(T) = 7.1T, q(a) = 5.0, by gas puffing only) and to increase the energy confinement time by almost 50% with respect to the average value of 50 ms of the old ohmic FTU database. An accurate analysis of these plasmas has been carried out by means of a gyrokinetic code to establish the role of collisionality and density gradients on the observed phenomenology.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Tokamaks, Tokamaks -- Design and construction, Lithium | ||||
Journal or Publication Title: | Nuclear Fusion | ||||
Publisher: | Institute of Physics Publishing Ltd. | ||||
ISSN: | 0029-5515 | ||||
Official Date: | July 2011 | ||||
Dates: |
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Volume: | Vol.51 | ||||
Number: | No.7 | ||||
Page Range: | 073006 | ||||
DOI: | 10.1088/0029-5515/51/7/073006 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Funder: | Euratom, European Nuclear Energy Agency (ENEA), Engineering and Physical Sciences Research Council (EPSRC) | ||||
Grant number: | EP/H002081/1 (EPSRC) |
Data sourced from Thomson Reuters' Web of Knowledge
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