The maximum likelihood reconstruction method for JET neutron tomography

被引：32
|
作者：
Craciunescu, T. [1 ,6 ]
Bonheure, G. [2 ,6 ]
Kiptily, V. [3 ,6 ]
Murari, A. [4 ,6 ]
Soare, S. [5 ,6 ]
Tiseanu, I. [1 ,6 ]
Zoita, V. [1 ,6 ]
机构：
[1] EURATOM MEdC Assoc, Natl Inst Laser Plasma & Radiat Phys, Bucharest, Romania
[2] EURATOM, Belgian State Assoc LPP ERM KMS, Partners TEC, B-1000 Brussels, Belgium
[3] UKAEA Euratom Fus Assoc, Culham Sci Ctr, Abingdon, Oxon, England
[4] Assoc ENEA Euratom Fusione, Consorzio RFX, Padua, Italy
[5] EURATOM MEdC Assoc, Natl Inst Cryogen & Isotop Technol, Rm Valcea, Romania
[6] JET EFDA Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2008年 / 595卷 / 03期
基金：
英国工程与自然科学研究理事会;
关键词：
Maximum likelihood tomography; Tokamak neutron plasma diagnostics;
D O I：
10.1016/j.nima.2008.07.145
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The JET neutron profile monitor ensures coverage of the neutron emissive region that enables tomographic reconstruction. However, due to the availability of only two projection angles and to the coarse sampling, tomography is a limited data set problem. A reconstruction method based on the maximum likelihood principle is developed for solving the reconstruction problem. A smoothing operator, defined as median filtering which uses a sliding window moving along magnetic contour lines, is used to compensate for the lack of experimental information. The method is tested on numerically simulated phantoms with shapes characteristic for this kind of tomography. Significant reconstructions of experimental data are reported. (C) 2008 Published by Elsevier B.V.
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页码：623 / 630
页数：8
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