Matches in SemOpenAlex for { <https://semopenalex.org/work/W2237437348> ?p ?o ?g. }
Showing items 1 to 97 of
97
with 100 items per page.
- W2237437348 abstract "Demonstration of ELM pacing by pellet injection on DIII-D and extrapolation to ITER * L.R. Baylor1, N. Commaux1, T.C. Jernigan1, P.B. Parks2, T.E. Evans2, T.H. Osborne2, E.J. Strait2, M.E. Fenstermacher3, C.J. Lasnier3, R.A. Moyer4, J.H. Yu4 1Oak Ridge National Laboratory, Oak Ridge, TN, USA 2General Atomics, San Diego, CA, USA 3 Lawrence Livermore National Laboratory, Livermore, CA, USA 4University of California San Diego, La Jolla, CA, USA Deuterium pellet injection has been used in experiments on the DIII-D tokamak to investigate the possibility of triggering small rapid edge localized modes (ELMs) in reactor relevant plasma regimes. ELMs have been observed to be triggered from small 1.8 mm pellets injected from all available locations and under all H-mode operating scenarios in DIII-D. Experimental details have shown that the ELMs are triggered before the pellets reach the top of the H-mode pedestal, implying that very small shallow penetrating pellets are sufficient to trigger ELMs. Fast camera images of the pellet entering the plasma from the low field side show a single plasma filament becoming visible near the pellet cloud and striking the outer vessel wall within 200 ms. Additional ejected filaments are then observed to subsequently reach the wall. The plasma stored energymore » loss from the pellet triggered ELMs is a function of the elapsed time after a previous ELM. Pellet ELM pacing has been proposed as a method to prevent large ELMs that can damage the ITER plasma facing components [1]. A demonstration of pacing of ELMs on DIII-D was made by injecting slow 14 Hz pellets on the low field side in an ITER shape plasma with low natural ELM frequency and a normalized b of 1.8. The non-pellet discharge natural ELM frequency was ~5 Hz with ELM energy losses up to 85 kJ (>10% of total stored energy) while the case with pellets was able to demonstrate >20 Hz ELMs with an average ELM energy loss less than 22 kJ (<3% of the total). The resulting ELM frequency was larger than the pellet frequency indicating both a direct ELM trigger by each pellet and an indirect effect on the overall pedestal stability to ELMs from the multiple pellets. No increase in density or significant decrease in energy confinement with the pellets was observed. The implications of these results for possible pellet ELM pacing on ITER will be discussed. [1] P.T. Lang et al., Nucl. Fusion 44 (2004) 665.« less" @default.
- W2237437348 created "2016-06-24" @default.
- W2237437348 creator A5001838161 @default.
- W2237437348 creator A5001881525 @default.
- W2237437348 creator A5001983823 @default.
- W2237437348 creator A5023466921 @default.
- W2237437348 creator A5024582470 @default.
- W2237437348 creator A5031376131 @default.
- W2237437348 creator A5064436898 @default.
- W2237437348 creator A5075969768 @default.
- W2237437348 creator A5081781859 @default.
- W2237437348 creator A5085669166 @default.
- W2237437348 creator A5087277934 @default.
- W2237437348 date "2010-01-01" @default.
- W2237437348 modified "2023-09-23" @default.
- W2237437348 title "Demonstration of ELM pacing by Pellet Injection on DIII-D and Extrapolation to ITER" @default.
- W2237437348 hasPublicationYear "2010" @default.
- W2237437348 type Work @default.
- W2237437348 sameAs 2237437348 @default.
- W2237437348 citedByCount "0" @default.
- W2237437348 crossrefType "journal-article" @default.
- W2237437348 hasAuthorship W2237437348A5001838161 @default.
- W2237437348 hasAuthorship W2237437348A5001881525 @default.
- W2237437348 hasAuthorship W2237437348A5001983823 @default.
- W2237437348 hasAuthorship W2237437348A5023466921 @default.
- W2237437348 hasAuthorship W2237437348A5024582470 @default.
- W2237437348 hasAuthorship W2237437348A5031376131 @default.
- W2237437348 hasAuthorship W2237437348A5064436898 @default.
- W2237437348 hasAuthorship W2237437348A5075969768 @default.
- W2237437348 hasAuthorship W2237437348A5081781859 @default.
- W2237437348 hasAuthorship W2237437348A5085669166 @default.
- W2237437348 hasAuthorship W2237437348A5087277934 @default.
- W2237437348 hasConcept C116515362 @default.
- W2237437348 hasConcept C116915560 @default.
- W2237437348 hasConcept C121332964 @default.
- W2237437348 hasConcept C127413603 @default.
- W2237437348 hasConcept C132459708 @default.
- W2237437348 hasConcept C134306372 @default.
- W2237437348 hasConcept C159985019 @default.
- W2237437348 hasConcept C166957645 @default.
- W2237437348 hasConcept C17923525 @default.
- W2237437348 hasConcept C185544564 @default.
- W2237437348 hasConcept C192562407 @default.
- W2237437348 hasConcept C2775907726 @default.
- W2237437348 hasConcept C2777017188 @default.
- W2237437348 hasConcept C2778495671 @default.
- W2237437348 hasConcept C2778611943 @default.
- W2237437348 hasConcept C2780584874 @default.
- W2237437348 hasConcept C33923547 @default.
- W2237437348 hasConcept C82706917 @default.
- W2237437348 hasConcept C95457728 @default.
- W2237437348 hasConceptScore W2237437348C116515362 @default.
- W2237437348 hasConceptScore W2237437348C116915560 @default.
- W2237437348 hasConceptScore W2237437348C121332964 @default.
- W2237437348 hasConceptScore W2237437348C127413603 @default.
- W2237437348 hasConceptScore W2237437348C132459708 @default.
- W2237437348 hasConceptScore W2237437348C134306372 @default.
- W2237437348 hasConceptScore W2237437348C159985019 @default.
- W2237437348 hasConceptScore W2237437348C166957645 @default.
- W2237437348 hasConceptScore W2237437348C17923525 @default.
- W2237437348 hasConceptScore W2237437348C185544564 @default.
- W2237437348 hasConceptScore W2237437348C192562407 @default.
- W2237437348 hasConceptScore W2237437348C2775907726 @default.
- W2237437348 hasConceptScore W2237437348C2777017188 @default.
- W2237437348 hasConceptScore W2237437348C2778495671 @default.
- W2237437348 hasConceptScore W2237437348C2778611943 @default.
- W2237437348 hasConceptScore W2237437348C2780584874 @default.
- W2237437348 hasConceptScore W2237437348C33923547 @default.
- W2237437348 hasConceptScore W2237437348C82706917 @default.
- W2237437348 hasConceptScore W2237437348C95457728 @default.
- W2237437348 hasLocation W22374373481 @default.
- W2237437348 hasOpenAccess W2237437348 @default.
- W2237437348 hasPrimaryLocation W22374373481 @default.
- W2237437348 hasRelatedWork W1551952137 @default.
- W2237437348 hasRelatedWork W1633852281 @default.
- W2237437348 hasRelatedWork W1964559638 @default.
- W2237437348 hasRelatedWork W1984824792 @default.
- W2237437348 hasRelatedWork W1988013767 @default.
- W2237437348 hasRelatedWork W1999459902 @default.
- W2237437348 hasRelatedWork W2020300083 @default.
- W2237437348 hasRelatedWork W2021913704 @default.
- W2237437348 hasRelatedWork W2029541699 @default.
- W2237437348 hasRelatedWork W2084953218 @default.
- W2237437348 hasRelatedWork W2244414744 @default.
- W2237437348 hasRelatedWork W2313112623 @default.
- W2237437348 hasRelatedWork W2338349431 @default.
- W2237437348 hasRelatedWork W2340986423 @default.
- W2237437348 hasRelatedWork W2602825644 @default.
- W2237437348 hasRelatedWork W2603545009 @default.
- W2237437348 hasRelatedWork W2776668083 @default.
- W2237437348 hasRelatedWork W2811508088 @default.
- W2237437348 hasRelatedWork W3211316849 @default.
- W2237437348 hasRelatedWork W842565277 @default.
- W2237437348 isParatext "false" @default.
- W2237437348 isRetracted "false" @default.
- W2237437348 magId "2237437348" @default.
- W2237437348 workType "article" @default.