SwePub
Sök i LIBRIS databas

  Utökad sökning

onr:"swepub:oai:research.chalmers.se:fe926f1b-cc5f-43d3-8d43-d18aefbb385f"
 

Sökning: onr:"swepub:oai:research.chalmers.se:fe926f1b-cc5f-43d3-8d43-d18aefbb385f" > Recent DIII-D advan...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00005728naa a2200649 4500
001oai:research.chalmers.se:fe926f1b-cc5f-43d3-8d43-d18aefbb385f
003SwePub
008190629s2019 | |||||||||||000 ||eng|
0247 a https://research.chalmers.se/publication/5104032 URI
0247 a https://doi.org/10.1088/1741-4326/ab17692 DOI
0247 a https://research.chalmers.se/publication/5110632 URI
040 a (SwePub)cth
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Paz-Soldan, C.u General Atomics4 aut
2451 0a Recent DIII-D advances in runaway electron measurement and model validation
264 c 2019-05-08
264 1b IOP Publishing,c 2019
520 a Novel measurements and modeling of runaway electron (RE) dynamics in DIII-D have resolved experimental discrepancies and validated predictions for ITER, improving confidence that RE avoidance and mitigation can be predictably achieved. Considering RE formation, first experimental assessments of the RE seed current demonstrates that present hot-tail theories are not yet accurate and require improved treatment of the pellet dynamics. Novel measurements of kinetic instabilities in the MHz-range have been made in the RE formation phase, with the intensity of these modes correlated with previously unexplained empirical thresholds for RE generation. Controlled RE dissipation experiments in quiescent regimes have validated RE distribution function dependencies on collisional and synchrotron damping, both in terms of distribution function shape and dissipation rates. Measurements of RE bremsstrahlung and synchrotron emission are now used in tandem to resolve energy and pitch-angle effects. A resolution to long-standing dissipation anomalies in the quiescent regime is offered by taking into account kinetic instability effects on RE phase-space dynamics. Kinetic instabilities in the 100-200 MHz range are directly observed, though modeling finds the largest dissipation arises from GHz range instabilities that are beyond the reach of existing diagnostics. Kinetic instabilities are also observed in the mature post-disruption RE plateau phase, so long as the collisional damping rate is reduced with low-Z injection. Experiments with high-Z injection find that the dissipation rate saturates with injection quantity, likely due to neutral diffusion rates being slower than vertical instability rates in DIII-D. Considering the final loss, a 0D model for first-wall Joule heating is found to be in agreement with experiment, and controlled access to RE equilibria with edge safety factor of two identifies novel dynamics brought about by large-scale kink instabilities. These dynamics are typified by fast (tens of microseconds) RE loss rates without RE beam regeneration. The above measurements and comparison with theory represent significant advances in the understanding of RE dynamics and indicate possible new opportunities for RE avoidance or mitigation via kinetic instabilities.
650 7a NATURVETENSKAPx Fysikx Atom- och molekylfysik och optik0 (SwePub)103022 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Atom and Molecular Physics and Optics0 (SwePub)103022 hsv//eng
650 7a NATURVETENSKAPx Fysikx Annan fysik0 (SwePub)103992 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Other Physics Topics0 (SwePub)103992 hsv//eng
650 7a NATURVETENSKAPx Fysikx Fusion, plasma och rymdfysik0 (SwePub)103032 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Fusion, Plasma and Space Physics0 (SwePub)103032 hsv//eng
653 a runaway electron
653 a disruption
653 a tokamak
653 a kinetic instability
7001 a Eidietis, N. W.u General Atomics4 aut
7001 a Hollmann, E Mu University of California4 aut
7001 a Aleynikov, P Bu Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut
7001 a Carbajal, L.u Oak Ridge National Laboratory4 aut
7001 a Heidbrink, W.W.u University of California at Irvine (UCI)4 aut
7001 a Hoppe, Mathias,d 1993u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)hoppe
7001 a Liu, C.u Princeton University4 aut
7001 a Lvovskiy, A.u Oak Ridge Associated Universities4 aut
7001 a Shiraki, D.u Oak Ridge National Laboratory4 aut
7001 a Spong, D.u Oak Ridge National Laboratory4 aut
7001 a Brennan, D. P.u Princeton University4 aut
7001 a Cooper, C. M.u Oak Ridge Associated Universities4 aut
7001 a del-Castillo-Negrete, Diegou Oak Ridge National Laboratory4 aut
7001 a Du, X.u General Atomics4 aut
7001 a Embréus, Ola,d 1991u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)embreus
7001 a Fülöp, Tünde,d 1970u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)tunde
7001 a Herfindal, J.u Oak Ridge National Laboratory4 aut
7001 a Moyer, R. A.u University of California4 aut
7001 a Parks, P.u General Atomics4 aut
7001 a Thome, K. E.u General Atomics4 aut
7102 a General Atomicsb University of California4 org
7730 t Nuclear Fusiond : IOP Publishingg 59:6q 59:6x 1741-4326x 0029-5515
8564 u https://pure.mpg.de/pubman/item/item_3055138_4/component/file_3173745/PazSoldan_Recent.pdf
8564 8u https://research.chalmers.se/publication/510403
8564 8u https://doi.org/10.1088/1741-4326/ab1769
8564 8u https://research.chalmers.se/publication/511063

Hitta via bibliotek

Till lärosätets databas

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy