DC Field | Value | Language |
---|---|---|
dc.contributor.author | Gilson, EP | ko |
dc.contributor.author | Lee, HH | ko |
dc.contributor.author | Bortolon, A | ko |
dc.contributor.author | Diallo, A | ko |
dc.contributor.author | Hong, SH | ko |
dc.contributor.author | Maingi, R. | ko |
dc.contributor.author | Mansfield, D | ko |
dc.contributor.author | Nagy, A | ko |
dc.contributor.author | Park, SH | ko |
dc.contributor.author | Yoon, SW | ko |
dc.contributor.author | Choe, Wonho | ko |
dc.contributor.author | Nazikian, R | ko |
dc.date.accessioned | 2023-08-04T03:00:40Z | - |
dc.date.available | 2023-08-04T03:00:40Z | - |
dc.date.created | 2023-07-07 | - |
dc.date.issued | 2019-07 | - |
dc.identifier.citation | 46th European Physical Society Conference on Plasma Physics, EPS 2019 | - |
dc.identifier.uri | http://hdl.handle.net/10203/311154 | - |
dc.description.abstract | Periods of ELM quiescence up to 5 s were observed with boron nitride (BN) injection into KSTAR ELMy H-modes with an innovative Impurity Powder Dropper (IPD) [1]. In addition, divertor Da emission was substantially reduced with boron (B) injection into ELMy H-modes, indicating improved recycling control. In both cases, there was no adverse impact on plasma stored energy. While edge fluctuations decreased overall, it appears that a new mode at ~ 180 kHz frequency appeared in beam emission spectroscopy data, suggesting a possible modification to the edge transport with active impurity injection. The powders were dropped into 0.5 MA plasmas with 1.6 MW of neutral beam heating and pulse durations of 10 - 20 s. Photodiode signals and real-color fast camera images show the powders entering the plasma. A series of 2.5 mg doses of BN, delivered in 0.1 s bursts, was observed to eventually reduce the ELM amplitude and frequency without changing the stored energy or plasma density. Analysis of the BES data during the ELM-free phase showed increased coherent mode activity near 180 kHz, corroborated by magnetics data. A continuous BN dose of 2.5 mg/s for 10 s reduced the ELM amplitude and frequency, but did not suppress ELMs. In addition, several 2.5 mg doses of B during a single discharge reduced recycling as evidenced by the reduced baseline Da level during the following shot. A 10 mg dose of B resulted in a disruption. | - |
dc.language | English | - |
dc.publisher | European Physical Society (EPS) | - |
dc.title | ELM suppression and recycling reduction by boron nitride and boron injection in KSTAR | - |
dc.type | Conference | - |
dc.identifier.scopusid | 2-s2.0-85084021096 | - |
dc.type.rims | CONF | - |
dc.citation.publicationname | 46th European Physical Society Conference on Plasma Physics, EPS 2019 | - |
dc.identifier.conferencecountry | IT | - |
dc.identifier.conferencelocation | Milan | - |
dc.contributor.localauthor | Choe, Wonho | - |
dc.contributor.nonIdAuthor | Gilson, EP | - |
dc.contributor.nonIdAuthor | Lee, HH | - |
dc.contributor.nonIdAuthor | Bortolon, A | - |
dc.contributor.nonIdAuthor | Diallo, A | - |
dc.contributor.nonIdAuthor | Hong, SH | - |
dc.contributor.nonIdAuthor | Maingi, R. | - |
dc.contributor.nonIdAuthor | Mansfield, D | - |
dc.contributor.nonIdAuthor | Nagy, A | - |
dc.contributor.nonIdAuthor | Park, SH | - |
dc.contributor.nonIdAuthor | Yoon, SW | - |
dc.contributor.nonIdAuthor | Nazikian, R | - |
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