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TJ-II:Dependence of NBI-driven Alfvén Eigenmodes on NBI energy and power: Difference between revisions
TJ-II:Dependence of NBI-driven Alfvén Eigenmodes on NBI energy and power (view source)
Revision as of 18:33, 21 March 2018
, 21 March 2018→Description of the activity, including motivation/objectives and experience of the proponent (typically one-two pages)
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observed Alfvén Eigenmodes (AEs) activity of the device, looking for voltage-current configurations at approximate constant power | observed Alfvén Eigenmodes (AEs) activity of the device, looking for voltage-current configurations at approximate constant power | ||
for which the AEs activity is lower. The behaviour of the NBI driven current is an essential element that must | for which the AEs activity is lower. The behaviour of the NBI driven current is an essential element that must | ||
be taken into account since the AEs activity may show a dependence on | be taken into account since the AEs activity may show a dependence on iota through plasma current variations induced by | ||
the changes in voltage (at constant power) comparable to the effects that the voltage variations | the changes in voltage (at constant power) comparable to the effects that the voltage variations | ||
themselves may have on the wave-particle resonance condition. To decouple both effects, an attempt to | themselves may have on the wave-particle resonance condition. To decouple both effects, an attempt to | ||
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the NBI phase in order to control the plasma density. | the NBI phase in order to control the plasma density. | ||
Two different values of NBI power shall be used, using the same power in both injectors and the same voltage-current pair. | |||
For each power value, four values of voltage are tested simultaneously in each beam paying attention to keep a more less | |||
constant plasma current which ideally should mainly come from the bootstrap contribution. | |||
Two reproducible shots per voltage | |||
== If applicable, International or National funding project or entity == | == If applicable, International or National funding project or entity == | ||