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Discriminating the role of rotation and its gradient in determining ion stiffness mitigation in JETBaiocchi, B. ...Starting from recent JET experimental results that show a significant reduction of ion stiffness in the plasma core region due to plasma rotation in the presence of low magnetic shear, an experiment ... was carried out at JET in order to separate the role of rotation and rotation gradient in mitigating the ion stiffness level. Enhanced toroidal field ripple (up to 1.5%) and external resonant magnetic fields are the two mechanisms used to try and decouple the rotation value from its gradient. In addition, shots with reversed toroidal field and plasma current, yielding counter-current neutral beam injection, were compared with standard co-injection cases. These tools also allowed varying the rotation independently of the injected power. Shots with high rotation gradient are found to maintain their low stiffness level even when the absolute value of the rotation was significantly reduced. Conversely, high but flat rotation yields much less peaked ion temperature profiles than a peaked rotation profile with lower values. This behaviour suggests the rotation gradient as the main player in reducing the ion stiffness level. In addition, it is found that inverting the rotation gradient sign does not suppress its effect on ion stiffnessSource: Plasma physics and controlled fusion. - ISSN 0741-3335 (Iss. 2, Vol. 55, 2013, str. 025010-1-025010-7)Type of material - article, component partPublish date - 2013Language - englishCOBISS.SI-ID - 26795559
Author
Baiocchi, B. |
Mantica, P. |
Giroud, C. |
Snoj, Luka, 1981- |
Trkov, Andrej |
Lengar, Igor |
Žefran, Bojan
Topics
jedrska fizika |
fizika plazme
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source: Plasma physics and controlled fusion. - ISSN 0741-3335 (Iss. 2, Vol. 55, 2013, str. 025010-1-025010-7)
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Year | Impact factor | Edition | Category | Classification | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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DRS, in which the journal is indexed
Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Baiocchi, B. | ![]() |
Mantica, P. | ![]() |
Giroud, C. | ![]() |
Snoj, Luka, 1981- | 27819 |
Trkov, Andrej | 08557 |
Lengar, Igor | 19167 |
Žefran, Bojan | 15742 |
Source: Personal bibliographies
and: SICRIS
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