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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)
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== Proposal title == | == Proposal title == | ||
'''Dependence of NBI-driven | '''Dependence of NBI-driven Alfven Eigenmodes on energy and power of the neutral beams in a current compensated scenario''' | ||
== Name and affiliation of proponent == | == Name and affiliation of proponent == | ||
Á. Cappa, E. Ascasíbar, M. Liniers LNF-CIEMAT | Á. Cappa, E. Ascasíbar, M. Liniers, F.Castejón | ||
LNF-CIEMAT | |||
== Details of contact person at LNF (if applicable) == | == Details of contact person at LNF (if applicable) == | ||
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as a smooth evolution of the plasma density is achieved. If this is not possible, ECRH may be used during | as a smooth evolution of the plasma density is achieved. If this is not possible, ECRH may be used during | ||
the NBI phase in order to control the plasma density. | the NBI phase in order to control the plasma density. | ||
For each power value, four values of voltage are tested simultaneously in each beam paying attention to keep a more less | *Target plasma using ECRH, then ECRH is switched off and only used if good density control is not achieved. | ||
*Three 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. | constant plasma current which ideally should mainly come from the bootstrap contribution. | ||
Two reproducible shots per voltage | *Two reproducible shots per voltage. Alternatively, the length of one of the beams may be 20-30 ms shorter than the | ||
other one in order to isolate the mode excitation that corresponds to each beam and identify which beam drives which modes. | |||
*24 shots in total. One day of operation. | |||
== If applicable, International or National funding project or entity == | == If applicable, International or National funding project or entity == | ||
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== Description of required resources == | == Description of required resources == | ||
Required resources: | Required resources: | ||
* Number of plasma discharges or days of operation: | * Number of plasma discharges or days of operation: 24 (1 day) | ||
* Essential diagnostic systems: Mirnov Coils (poloidal and new helicoidal array), rest of magnetic fluctuations diagnostics, all standard diagnostics (Thomson, ECE, Radiation, Interferometry), Doppler reflectometry, HIBP. | * Essential diagnostic systems: Mirnov Coils (poloidal and new helicoidal array), rest of magnetic fluctuations diagnostics, all standard diagnostics (Thomson, ECE, Radiation, Interferometry), Doppler reflectometry, HIBP. | ||
* Type of plasmas (heating configuration): 100_44_64 | * Type of plasmas (heating configuration): 100_44_64 | ||
* Specific requirements on wall conditioning if any: | * Specific requirements on wall conditioning if any: Good density control | ||
* External users: need a local computer account for data access: | * External users: need a local computer account for data access: No external users | ||
* Any external equipment to be integrated? | * Any external equipment to be integrated? No | ||
== Preferred dates and degree of flexibility == | == Preferred dates and degree of flexibility == | ||
Preferred dates: (format dd-mm-yyyy) | Preferred dates: (format dd-mm-yyyy) | ||
From 23rd to 25th May A. Cappa will be not available. | From 23rd to 25th May A. Cappa will be not available. | ||
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[[Category:TJ-II internal documents]] | [[Category:TJ-II internal documents]] | ||
[[Category:TJ-II experimental proposals]] | [[Category:TJ-II experimental proposals Spring 2018]] | ||