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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00006250naa a2200637 4500
001oai:DiVA.org:kth-252366
003SwePub
008190718s2019 | |||||||||||000 ||eng|
024a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2523662 URI
024a https://doi.org/10.1088/1741-4326/ab14462 DOI
040 a (SwePub)kth
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
100a Litnovsky, A.u Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany.4 aut
2451 0a Diagnostic mirrors for ITER :b research in the frame of International Tokamak Physics Activity
264 c 2019-05-08
264 1b IOP PUBLISHING LTD,c 2019
338 a print2 rdacarrier
500 a QC 20190718
520 a Mirrors will be used as first plasma-viewing elements in optical and laser-based diagnostics in ITER. Deterioration of the mirror performance due to e.g. sputtering of the mirror surface by plasma particles or deposition of impurities will hamper the entire performance of the affected diagnostic and thus affect ITER operation. The Specialists Working Group on First Mirrors (FM SWG) in the Topical Group on Diagnostics of the International Tokamak Physics Activity (ITPA) plays an important role in finding solutions for diagnostic first mirrors. Sound progress in research and development of diagnostic mirrors in ITER was achieved since the last overview in 2009. Single crystal (SC) rhodium (Rh) mirrors became available. SC rhodium and molybdenum (Mo) mirrors survived in conditions corresponding to similar to 200 cleaning cycles with a negligible degradation of reflectivity. These results are important for a mirror cleaning system which is presently under development. The cleaning system is based on sputtering of contaminants by plasma. Repetitive cleaning was tested on several mirror materials. Experiments comprised contamination/cleaning cycles. The reflectivity SC Mo and Rh mirrors has changed insignificantly after 80 cycles. First in situ cleaning using radiofrequency (RF) plasma was conducted in EAST tokamak with a mock-up plate of ITER edge Thomson Scattering (ETS) with five inserted mirrors. Contaminants from the mirrors were removed. Physics of cleaning discharge was studied both experimentally and by modeling. Mirror contamination can also be mitigated by protecting diagnostic ducts. A deposition mitigation (DeMi) duct system was exposed in KSTAR. The real-time measurement of deposition in the diagnostic duct was pioneered during this experiment. Results evidenced the dominating effect of the wall conditioning and baking on contamination inside the duct. A baffled cassette with mirrors was exposed at the main wall of JET for 23,6 plasma hours. No significant degradation of reflectivity was measured on mirrors located in the ducts. Predictive modeling was further advanced. A model for the particle transport, deposition and erosion at the port-plug was used in selecting an optical layout of several ITER diagnostics. These achievements contributed to the focusing of the first mirror research thus accelerating the diagnostic development. Modeling requires more efforts. Remaining crucial issues will be in a focus of the future work of the FM SWG.
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 ITER
653 a diagnostic mirrors
653 a in situ mirror cleaning
653 a recovery of reflectivity
653 a single crystal mirrors
653 a mirror protection
653 a ITPA
700a Voitsenya, V. S.u NSC Kharkov Inst Phys & Technol, IPP, UA-61008 Kharkov, Ukraine.4 aut
700a Reichle, R.u ITER Org, Route Vinon Sur Verdon,CS 90 046, F-13067 Saint Paul Lez Durance, France.4 aut
700a Walsh, M.u ITER Org, Route Vinon Sur Verdon,CS 90 046, F-13067 Saint Paul Lez Durance, France.4 aut
700a Razdobarin, A.u Ioffe Physictech Inst, Polytech Skaya 26, St Petersburg 194021, Russia.4 aut
700a Dmitriev, A.u Ioffe Physictech Inst, Polytech Skaya 26, St Petersburg 194021, Russia.4 aut
700a Babinov, N.u Ioffe Physictech Inst, Polytech Skaya 26, St Petersburg 194021, Russia.4 aut
700a Marot, L.u Univ Basel, Klingelbergstr 82, CH-4056 Basel, Switzerland.4 aut
700a Moser, L.u Univ Basel, Klingelbergstr 82, CH-4056 Basel, Switzerland.4 aut
700a Yan, R.u Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China.4 aut
700a Rubel, Mareku KTH,Fusionsplasmafysik4 aut0 (Swepub:kth)u1vrej8y
700a Widdowson, A.u CCFE EURATOM Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England.4 aut
700a Moon, Sunwoou KTH,Fusionsplasmafysik4 aut0 (Swepub:kth)u1g8m6wm
700a Oh, S. G.u Ajou Univ, Suwon 16499, South Korea.4 aut
700a An, Y.u Natl Fus Res Inst, Daejeon 34133, South Korea.4 aut
700a Shigin, P.u ITER Org, Route Vinon Sur Verdon,CS 90 046, F-13067 Saint Paul Lez Durance, France.4 aut
700a Orlovskiy, Iu Natl Res Ctr Kurchatov Inst, Moscow 123098, Russia.4 aut
700a Vukolov, K. Yuu Natl Res Ctr Kurchatov Inst, Moscow 123098, Russia.4 aut
700a Andreenko, E.u Natl Res Ctr Kurchatov Inst, Moscow 123098, Russia.4 aut
700a Krimmer, A.u Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany.4 aut
700a Kotov, Vu Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany.4 aut
700a Mertens, Phu Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany.4 aut
710a Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany.b NSC Kharkov Inst Phys & Technol, IPP, UA-61008 Kharkov, Ukraine.4 org
773t Nuclear Fusiond : IOP PUBLISHING LTDg 59:6q 59:6x 0029-5515x 1741-4326
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-252366
8564 8u https://doi.org/10.1088/1741-4326/ab1446

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