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)

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 === 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.
+We will prepare 300 um diameter TESPELs at the Ciemat TESPEL laboratory and fill these will small known quantities of the different tracers of interest. These will be injected into NBI heated phase of plasmas in TJ-II, if available. Otherwise they can be injected into the final 10's of milliseconds of the ECRH phase. It is intended that the TESPEL will reach the plasma core at which point the tracers will be exposed to the plasma. Once exposed to the hot plasma, spectral line emissions for the atomic state will be recorded using a compact UV-visible spectrometer located in the same TJ-II sector as the TESPEL injector. Strong spectral lines for highly ionized states of the same elements will be recorded using a VUV spectrometer located 180º away toroidally.
 === Approach and Methodology ===