The 'neutron deficit' in the JET tokamak

被引：27

作者：

Weisen, H. ^{[1
,42
]}

Kim, Hyun-Tae ^{[2
]}

Strachan, J. ^{[3
,85
]}

Scott, S. ^{[3
]}

Baranov, Y. ^{[2
]}

Buchanan, J. ^{[2
,16
]}

Fitzgerald, M. ^{[2
,16
]}

Keeling, D. ^{[2
]}

King, D. B. ^{[2
]}

Giacomelli, L. ^{[4
,54
]}

Koskela, T. ^{[5
,10
]}

Weisen, M. J. ^{[6
]}

Giroud, C. ^{[2
,16
]}

Maslov, M. ^{[2
,16
]}

Core, W. G. ^{[2
]}

Zastrow, K. -D. ^{[2
]}

Syme, D. B. ^{[2
]}

Popovichev, S. ^{[2
,16
]}

Conroy, S. ^{[7
,31
]}

Lengar, I. ^{[8
,90
]}

Snoy, L. ^{[8
]}

Batistoni, P. ^{[9
,99
]}

Santala, M. ^{[5
]}

Abduallev, S. ^{[48
]}

Abhangi, M. ^{[55
]}

Abreu, P. ^{[62
]}

Afzal, M. ^{[16
]}

Aggarwal, K. M. ^{[38
]}

Ahlgren, T. ^{[110
]}

Ahn, J. H. ^{[17
]}

Aho-Mantila, L. ^{[120
]}

Aiba, N. ^{[78
]}

Airila, M. ^{[120
]}

Albanese, R. ^{[113
]}

Aldred, V. ^{[16
]}

Alegre, D. ^{[102
]}

Alessi, E. ^{[54
]}

Aleynikov, P. ^{[64
]}

Alfier, A. ^{[21
]}

Alkseev, A. ^{[81
]}

Allinson, M. ^{[16
]}

Alper, B. ^{[16
]}

Alves, E. ^{[62
]}

Ambrosino, G. ^{[113
]}

Ambrosino, R. ^{[114
]}

Amicucci, L. ^{[99
]}

Amosov, V. ^{[97
]}

Sunden, E. Andersson ^{[31
]}

Angelone, M. ^{[99
]}

Anghel, M. ^{[94
]}

机构：

[1] Ecole Polytech Fed Lausanne, SPC, Lausanne, Switzerland

[2] Culham Ctr Fus Energy, Abingdon, Oxon, England

[3] Princeton Univ, PPPL, Princeton, NJ 08544 USA

[4] IFP CNR, Milan, Italy

[5] Aalto Univ, Sch Sci, Espoo, Finland

[6] Univ Strathclyde, Glasgow, Lanark, Scotland

[7] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

[8] Jozef Stefan Inst, Ljubljana, Slovenia

[9] ENEA, Via E Fermi 45, I-00044 Rome, Italy

[10] Aalto Univ, POB 14100, FIN-00076 Aalto, Finland

[11] Aix Marseille Univ, CNRS, Ctr Marseille, M2P2 UMR 7340, F-13451 Marseille, France

[12] Aix Marseille Univ, CNRS, IUSTI UMR 7343, F-13013 Marseille, France

[13] Aix Marseille Univ, CNRS, PIIM, UMR 7345, F-13013 Marseille, France

[14] Arizona State Univ, Tempe, AZ USA

[15] Barcelona Supercomp Ctr, Barcelona, Spain

[16] CCFE Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England

[17] CEA, IRFM, F-13108 St Paul Les Durance, France

[18] Univ Calif San Diego, Ctr Energy Res, La Jolla, CA 92093 USA

[19] Ctr Brasileiro Pesquisas Fis, Rua Xavier Sigaud 160, BR-22290180 Rio De Janeiro, Brazil

[20] Consorzio CREATE, Via Claudio 21, I-80125 Naples, Italy

[21] Consorzio RFX, Corso Stati Uniti 4, I-35127 Padua, Italy

[22] Daegu Univ, Gyongsan 712174, Gyeongbuk, South Korea

[23] Univ Carlos III Madrid, Dept Fis, Madrid 28911, Spain

[24] Univ Ghent, Dept Appl Phys UG, St Pietersnieuwstr 41, B-9000 Ghent, Belgium

[25] Chalmers Univ Technol, Dept Earth & Space Sci, SE-41296 Gothenburg, Sweden

[26] Univ Cagliari, Dept Elect & Elect Engn, Piazza Armi 09123, Cagliari, Italy

[27] Comenius Univ, Dept Expt Phys, Fac Math Phys & Informat, Mlynska Dolina F2, Bratislava 84248, Slovakia

[28] Warsaw Univ Technol, Dept Mat Sci, PL-01152 Warsaw, Poland

[29] Korea Adv Inst Sci & Technol, Dept Nucl & Quantum Engn, Daejeon 34141, South Korea

[30] Univ Strathclyde, Dept Phys & Appl Phys, Glasgow G4 ONG, Lanark, Scotland

[31] Uppsala Univ, Dept Phys & Astron, SE-75120 Uppsala, Sweden

[32] Chalmers Univ Technol, Dept Phys, S-41296 Gothenburg, Sweden

[33] Imperial Coll London, Dept Phys, London SW7 2AZ, England

[34] KTH, SCI, Dept Phys, SE-10691 Stockholm, Sweden

[35] Univ Basel, Dept Phys, Basel, Switzerland

[36] Univ Oxford, Dept Phys, Oxford OX1 2JD, England

[37] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

[38] Queens Univ, Dept Pure & Appl Phys, Belfast BT7 1NN, Antrim, North Ireland

[39] Univ Catania, Dipartimento Ingn Elettr Elettron & Informat, I-95125 Catania, Italy

[40] Univ Trento, Dipartimento Ingn Ind, Trento, Italy

[41] Dublin City Univ, Dublin, Ireland

[42] Swiss Plasma Ctr, EPFL, CH-1015 Lausanne, Switzerland

[43] EUROfus Programme Management Unit, Boltzmannstr 2, D-85748 Garching, Germany

[44] Culham Sci Ctr, EUROfus Programme Management Unit, Culham OX14 3DB, England

[45] European Commiss, B-1049 Brussels, Belgium

[46] ULB, Fluid & Plasma Dynam, Campus Plaine CP 231 Blvd Triomphe, B-1050 Brussels, Belgium

[47] FOM Inst DIFFER, Eindhoven, Netherlands

[48] Forschungszentrum Julich GmbH, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany

[49] Fourth State Res, 503 Lockhart Dr, Austin, TX USA

[50] Fus Energy Joint Undertaking, Josep Pl 2,Torres Diagonal Litoral B3, Barcelona 08019, Spain

来源：

NUCLEAR FUSION | 2017年 / 57卷 / 07期

关键词：

neutron yield; fusion reactions; Monte Carlo orbit code; TRANSP; EMISSION; TRANSPORT; PLASMAS;

D O I：

10.1088/1741-4326/aa6dcc

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The measured D-D neutron rate of neutral beam heated JET baseline and hybrid H-modes in deuterium is found to be between approximately 50% and 100% of the neutron rate expected from the TRANSP code, depending on the plasma parameters. A number of candidate explanations for the shortfall, such as fuel dilution, errors in beam penetration and effectively available beam power have been excluded. As the neutron rate in JET is dominated by beamplasma interactions, the ` neutron deficit' may be caused by a yet unidentified form of fast particle redistribution. Modelling, which assumes fast particle transport to be responsible for the deficit, indicates that such redistribution would have to happen at time scales faster than both the slowing down time and the energy confinement time. Sawteeth and edge localised modes are found to make no significant contribution to the deficit. There is also no obvious correlation with magnetohydrodynamic activity measured using magnetic probes at the tokamak vessel walls. Modelling of fast particle orbits in the 3D fields of neoclassical tearing modes shows that realistically sized islands can only contribute a few percent to the deficit. In view of these results it appears unlikely that the neutron deficit results from a single physical process in the plasma.

引用

页数：11

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