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TJ-II: Injection of TESPELs with compounds or multiple elements of interest for W7-X: Difference between revisions
TJ-II: Injection of TESPELs with compounds or multiple elements of interest for W7-X (view source)
Revision as of 10:44, 28 March 2022
, 28 March 2022→Description of the activity
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=== Motivation and Background === | === Motivation and Background === | ||
Inject TESPELs containing compounds of interest (e.g. Li2CO3) and atomic elements (Al, Ti, Fe Cu, Ni, Mn, W) that are candidates for use in the OP2.1 campaign in W7-X. The principal aim is to identify strong emission lines from the atomic states of these elements in order to prepare filterscopes for the W7-X TESPEL system. You can use references, e.g, <ref>A. Einstein, Journal of Exceptional Results (2017)</ref>. | |||
=== Proposal Objectives === | === Proposal Objectives === | ||
We will prepared 300 um diameter TESPELs at the Ciemat laboratory and fill these will small quantities of the different tracers of interest. It is intended to inject these into ECRH heated plasmas on TJ-II so that the polystyrene outer shell will have been evaporated when the TESPEL is in the plasma core. The tracers are then exposed to the plasma and atomic line emissions will be recorded using a compact UV-visible spectrometer located in the same TJ-II sector. This will allow identifying the strong emissions lines from each element. | |||
=== Approach and Methodology === | === Approach and Methodology === | ||
ECRH plasmas are best for this, albeit it might be possible to perform these measurements also in NBI plasmas (the TESPEL penetration depth is large in NBI plasmas so the TESPEL may exit the plasma without exposing the tracers). Standard magnetic configuration with ECRH off-axis to avoid density cut-off. | |||
== International or National funding project or entity == | == International or National funding project or entity == | ||