Evaluation of reconstruction errors and identification of artefacts for JET gamma and neutron tomography

被引：6

作者：

Craciunescu, Teddy ^{[1
]}

Murari, Andrea ^{[2
]}

Kiptily, Vasily ^{[3
]}

Lupelli, Ivan ^{[3
,4
]}

Fernandes, Ana ^{[5
]}

Sharapov, Sergei ^{[3
]}

Tiseanu, Ion ^{[1
]}

Zoita, Vasile ^{[1
]}

Abhangi, M. ^{[39
]}

Abreu, P. ^{[45
]}

Aftanas, M. ^{[42
]}

Afzal, M. ^{[8
]}

Aggarwal, K. M. ^{[25
]}

Aho-Mantila, L. ^{[99
]}

Ahonen, E. ^{[6
]}

Aints, M. ^{[95
]}

Airila, M. ^{[99
]}

Albanese, R. ^{[93
]}

Alegre, D. ^{[51
]}

Alessi, E. ^{[38
]}

Aleynikov, P. ^{[47
]}

Alfier, A. ^{[12
]}

Alkseev, A. ^{[60
]}

Allan, P. ^{[8
]}

Almaviva, S. ^{[84
]}

Alonso, A. ^{[51
]}

Alper, B. ^{[8
]}

Alsworth, I. ^{[8
]}

Alves, D. ^{[45
]}

Ambrosino, G. ^{[93
]}

Ambrosino, R. ^{[94
]}

Amosov, V. ^{[77
]}

Andersson, F. ^{[16
]}

Andersson Sunden, E. ^{[20
]}

Angelone, M. ^{[79
]}

Anghel, A. ^{[74
]}

Anghel, M. ^{[73
]}

Angioni, C. ^{[54
]}

Appel, L. ^{[8
]}

Apruzzese, G. ^{[79
]}

Arena, P. ^{[26
]}

Ariola, M. ^{[94
]}

Arnichand, H. ^{[9
]}

Arnoux, G. ^{[8
]}

Arshad, S. ^{[35
]}

Ash, A. ^{[8
]}

Asp, E. ^{[20
]}

Asunta, O. ^{[6
]}

Atanasiu, C. V. ^{[74
]}

Austin, Y. ^{[8
]}

机构：

[1] Natl Inst Laser Plasma & Radiat Phys, Magurele, Romania

[2] Consorzio RFX, Padua, Italy

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

[4] Univ Roma Tor Vergata, Rome, Italy

[5] Univ Lisbon, Inst Super Tecn, Inst Plasmas & Fusao Nucl, P-1699 Lisbon, Portugal

[6] Aalto Univ, FIN-00076 Aalto, Finland

[7] BCS, Barcelona, Spain

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

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

[10] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, Brazil

[11] Consorzio CREATE, I-80125 Naples, Italy

[12] Consorzio RFX, I-35127 Padua, Italy

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

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

[15] Univ Ghent, Dept Appl Phys, B-9000 Ghent, Belgium

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

[17] Univ Cagliari, Dept Elect & Elect Engn, I-09123 Cagliari, Italy

[18] Comenius Univ, Fac Math Phys & Informat, Dept Expt Phys, Bratislava 84248, Slovakia

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

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

[21] Lund Univ, Dept Phys, SE-22100 Lund, Sweden

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

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

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

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

[26] Univ Catania, Dipartimento Ingn Elettr Elettr & Sistemi, I-95125 Catania, Italy

[27] Dublin City Univ, Dublin, Ireland

[28] CRPP, EPFL, CH-1015 Lausanne, Switzerland

[29] CNRS, UMR 7648, Ecole Polytech, F-91128 Palaiseau, France

[30] EUROfus Programme Management Unit, D-85748 Garching, Germany

[31] Culham Sci Ctr, EUROfus Programme Management Unit, Abingdon OX14 3DB, Oxon, England

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

[33] FOM Inst DIFFER, NL-3430 BE Nieuwegein, Netherlands

[34] Forsch Zentrum Julich GmbH, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany

[35] Fus Energy Joint Undertaking, Barcelona 08019, Spain

[36] KTH, EES, Fus Plasma Phys, SE-10044 Stockholm, Sweden

[37] Gen Atom, San Diego, CA 85608 USA

[38] IFP CNR, I-20125 Milan, Italy

[39] Inst Plasma Res, Gandhinagar 382428G, Gujarat, India

[40] Bulgarian Acad Sci, Inst Elect, BU-1784 Sofia, Bulgaria

[41] Inst Plasma Phys & Laser Microfus, PL-01497 Warsaw, Poland

[42] Inst Plasma Phys AS CR, Prague 182 00 8, Czech Republic

[43] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

[44] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, Brazil

[45] Univ Lisbon, Inst Super Tecn, Inst Plasmas & Fusao Nucl, Lisbon, Portugal

[46] Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[47] ITER Org, F-13067 St Paul Les Durance, France

[48] Naka Fus Res Estab, Japan Atom Energy Agcy, Naka 3110913, Ibaraki, Japan

[49] Karlsruhe Inst Technol, D-76021 Karlsruhe, Germany

[50] Univ Nice Sophia Antipolis, Lab JA Dieudonne, F-06108 Nice 2, France

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2016年 / 87卷 / 01期

关键词：

IMAGE-RECONSTRUCTION; NOISE PROPERTIES; LIKELIHOOD RECONSTRUCTION; MAXIMUM-LIKELIHOOD; ALGORITHMS; RESOLUTION; EMISSION; PROPAGATION;

D O I：

10.1063/1.4939252

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The Joint European Torus (JET) neutron profile monitor ensures 2D coverage of the gamma and neutron emissive region that enables tomographic reconstruction. Due to the availability of only two projection angles and to the coarse sampling, tomographic inversion is a limited data set problem. Several techniques have been developed for tomographic reconstruction of the 2-D gamma and neutron emissivity on JET, but the problem of evaluating the errors associated with the reconstructed emissivity profile is still open. The reconstruction technique based on the maximum likelihood principle, that proved already to be a powerful tool for JET tomography, has been used to develop a method for the numerical evaluation of the statistical properties of the uncertainties in gamma and neutron emissivity reconstructions. The image covariance calculation takes into account the additional techniques introduced in the reconstruction process for tackling with the limited data set (projection resampling, smoothness regularization depending on magnetic field). The method has been validated by numerically simulations and applied to JET data. Different sources of artefacts that may significantly influence the quality of reconstructions and the accuracy of variance calculation have been identified.

引用

页数：9

共 35 条

[1] THE JET NEUTRON EMISSION PROFILE MONITOR [J].

ADAMS, JM ;

JARVIS, ON ;

SADLER, GJ ;

SYME, DB ;

WATKINS, N .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1993, 329 (1-2) :277-290

[2] NOISE PROPERTIES OF THE EM ALGORITHM .1. THEORY [J].

BARRETT, HH ;

WILSON, DW ;

TSUI, BMW .

PHYSICS IN MEDICINE AND BIOLOGY, 1994, 39 (05) :833-846

[3]

Bonheure G., 2005, 32 EPS C PLASM PHYS, V29C

[4] A non-parametric bootstrap approach for analysing the statistical properties of SPECT and PET images [J].

Buvat, I .

PHYSICS IN MEDICINE AND BIOLOGY, 2002, 47 (10) :1761-1775

[5]

Cowan G., 1998, STAT DATA ANAL

[6] The maximum likelihood reconstruction method for JET neutron tomography [J].

Craciunescu, T. ;

Bonheure, G. ;

Kiptily, V. ;

Murari, A. ;

Soare, S. ;

Tiseanu, I. ;

Zoita, V. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2008, 595 (03) :623-630

[7] Sparse image representation for jet neutron and gamma tomography [J].

Craciunescu, T. ;

Kiptily, V. ;

Murari, A. ;

Tiseanu, I. ;

Zoita, V. .

FUSION ENGINEERING AND DESIGN, 2013, 88 (6-8) :1240-1243

[8] A comparison of four reconstruction methods for JET neutron and gamma tomography [J].

Craciunescu, T. ;

Bonheure, G. ;

Kiptily, V. ;

Murari, A. ;

Tiseanu, I. ;

Zoita, V. ;

Contributors, JET-EFDA .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2009, 605 (03) :374-383

[9] MAXIMUM LIKELIHOOD FROM INCOMPLETE DATA VIA EM ALGORITHM [J].

DEMPSTER, AP ;

LAIRD, NM ;

RUBIN, DB .

JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES B-METHODOLOGICAL, 1977, 39 (01) :1-38

[10] Quantitative Statistical Methods for Image Quality Assessment [J].

Dutta, Joyita ;

Ahn, Sangtae ;

Li, Quanzheng .

THERANOSTICS, 2013, 3 (10) :741-756

← 1 2 3 4 →