TJ-II: Two dimensional distribution of plasma potential and density
Experimental campaign
2021
Proposal title
TJ-II: Two dimensional distribution of plasma potential and density
Name and affiliation of proponent
Kutchatov HIBP team
Kharkov HIBP team
Ciemat team
Details of contact person at LNF
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Description of the activity
The first experiments aimed at obtaining the 2D distribution of plasma potential were performed in TJ-II using Heavy Ion Beam Probe (HIBP) with the variation of two parameters: plasma entrance angle and the energy of the Cs+ probing beam in the range 128-148 keV [1].
During 2021 HIBP was extended to 176 keV with a beam current up to 300 μA [2]
The goal of this proposal is to expand the HIBP energy range [80 - 200 keV] to explore the whole TJ-II poloidal cross-section.
International or National funding project or entity
If applicable, enter funding here or write N/A
Description of required resources
Required resources:
• Number of days of operation: 2
• Essential diagnostic systems: Dual HIBP [May / June]
• Type of plasmas (heating configuration): ECRH & NBI
• Wall conditioning: Sufficient density control for good reproducibility in NBI plasmas.
Preferred dates and degree of flexibility
Preferred dates: (format dd-mm-yyyy)