TJ-II:Biasing probe: Difference between revisions

TJ-II:Biasing probe (view source)

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Revision as of 11:09, 1 December 2021 (view source) Igor voldiner (talk \| contribs) m (Fixed sector reference (toroidal angle is correct)) ← Older edit		Revision as of 19:01, 29 April 2024 (view source) Admin (talk \| contribs) No edit summary Newer edit →
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	[[File:TJ-II_Biasing_probe.jpg\|300px\|thumb\|right\|~~Layout~~ of the biasing probe, mounted on the [[TJ-II:Langmuir Probes\|reciprocating probe]] drive]]		[[File:TJ-II_Biasing_probe.jpg\|300px\|thumb\|right\|Conceptual diagram of the biasing probe, mounted on the [[TJ-II:Langmuir Probes\|reciprocating probe]] drive]]
	At [[TJ-II]], a 2-D carbon composite mushroom shaped electrode (12 mm high with a diameter of 25 mm) has been developed and installed on a fast reciprocating probe drive. Typically, the electrode is inserted to a position 2 cm inside the last closed flux surface (LCFS) and biased positively (200-300 V) with respect to one of the two [[TJ-II:Limiter\|TJ-II limiters]] located in the [[Scrape-Off Layer]] region (about 0.5 cm beyond the LCFS). Measured electrode currents are in the range of 30-50 A.		At [[TJ-II]], a 2-D carbon composite mushroom shaped electrode (12 mm high with a diameter of 25 mm) has been developed and installed on a fast reciprocating probe drive. Typically, the electrode is inserted to a position 2 cm inside the last closed flux surface (LCFS) and biased positively (200-300 V) with respect to one of the two [[TJ-II:Limiter\|TJ-II limiters]] located in the [[Scrape-Off Layer]] region (about 0.5 cm beyond the LCFS). Measured electrode currents are in the range of 30-50 A.