First neutron spectrometry measurement at the HL-2A Tokamak
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摘要
A compact neutron spectrometer based on the liquid scintillator is presented for neutron energy spectrum measurements at the HL-2A Tokamak. The spectrometer was well characterized and a fast digital pulse shape discrimination software was developed using the charge comparison method. A digitizer data acquisition system with a maximum frequency of 1 MHz can work under an environment with a high count rate at HL-2A Tokamak. Specific radiation and magnetic shielding for the spectrometer were designed for the neutron spectrum measurement at the HL-2A Tokamak. For pulse height spectrum analysis, dedicated numerical simulation utilizing NUBEAM combined with GENESIS was performed to obtain the neutron energy spectrum. Subsequently, the transportation process from the plasma to the detector was evaluated with Monte Carlo calculations. The distorted neutron energy spectrum was folded with the response matrix of the liquid scintillation spectrometer, and good consistency was found between the simulated and measured pulse height spectra. This neutron spectrometer based on a digital acquisition system could be well adopted for the investigation of the auxiliary heating behavior and the fast-ion related phenomenon on di?erent tokamak devices.
A compact neutron spectrometer based on the liquid scintillator is presented for neutron energy spectrum measurements at the HL-2A Tokamak. The spectrometer was well characterized and a fast digital pulse shape discrimination software was developed using the charge comparison method. A digitizer data acquisition system with a maximum frequency of 1 MHz can work under an environment with a high count rate at HL-2A Tokamak. Specific radiation and magnetic shielding for the spectrometer were designed for the neutron spectrum measurement at the HL-2A Tokamak. For pulse height spectrum analysis, dedicated numerical simulation utilizing NUBEAM combined with GENESIS was performed to obtain the neutron energy spectrum. Subsequently, the transportation process from the plasma to the detector was evaluated with Monte Carlo calculations. The distorted neutron energy spectrum was folded with the response matrix of the liquid scintillation spectrometer, and good consistency was found between the simulated and measured pulse height spectra. This neutron spectrometer based on a digital acquisition system could be well adopted for the investigation of the auxiliary heating behavior and the fast-ion related phenomenon on di?erent tokamak devices.
A compact neutron spectrometer based on the liquid scintillator is presented for neutron energy spectrum measurements at the HL-2A Tokamak. The spectrometer was well characterized and a fast digital pulse shape discrimination software was developed using the charge comparison method. A digitizer data acquisition system with a maximum frequency of 1 MHz can work under an environment with a high count rate at HL-2A Tokamak. Specific radiation and magnetic shielding for the spectrometer were designed for the neutron spectrum measurement at the HL-2A Tokamak. For pulse height spectrum analysis, dedicated numerical simulation utilizing NUBEAM combined with GENESIS was performed to obtain the neutron energy spectrum. Subsequently, the transportation process from the plasma to the detector was evaluated with Monte Carlo calculations. The distorted neutron energy spectrum was folded with the response matrix of the liquid scintillation spectrometer, and good consistency was found between the simulated and measured pulse height spectra. This neutron spectrometer based on a digital acquisition system could be well adopted for the investigation of the auxiliary heating behavior and the fast-ion related phenomenon on di?erent tokamak devices.
引文
1 Wolle B.Physics Reports,1999,312:1
2 Jarvis O N.Plasma Phys.Control.Fusion,1994,36:209
3 Hellesen C,Gatu Johnson M,Sund′en E A et al.Nucl.Fusion,2010,50:084006
4 White R B,Chance M S.Phys.Fluids,1984,27(10):2455
5 CHEN W,DING X T,LIU Yi et al.Nucl.Fusion,2010,50:084008
6 YANG Q W,LIU Yong,DING X T et al.Nucl.Fusion,2007,47:635
7 Ka¨llne J,Ballabio L,Gorini G et al.Phys.Rev.Lett.,2001,85:1246
8 Hellesen C,Gatu Johnson M,Sund′en E A et al.Nucl.Fusion,2010,50:022001
9 Hellesen C,Albergante M,Sund′en E A et al.Nucl.Fusion,2010,52:085013
10 Zimbal A,Reginatto M,Schuhmacher H et al.Rev.Sci.Instrum.,2004,75:3553
11 Esposito B,Bertalot L,Marocco D et al.Rev.Sci.Instrum.,2004,75:3550
12 Giacomelli L,Zimbal A,Tittelmeier K et al.Rev.Sci.Instrum.,2011,82:123504
13 Esposito B,Kaschuck Y,Rizzo A et al.Nucl.Instrum.Methods Phys.Res.A,2004,518:626
14 Shibata Y,Hoek M,Nishitani T et al.Japan Atomic Energy Research Institute Report,JAERI-Conf.,2000–004.130–133
15 Cecconello M,Turnyanskiy M,Conroy S et al.Rev.Sci.Instrum.,2010,81:10D315
16 LI X L,WAN B N,ZHONG G Q et al.Plasma Phys.Control.Fusion,2010,52:105006
17 Pankin A,McCune D,Bateman G et al.Computer Physics Communications,2004,159:157
18 Ballabio L.Calculation and Measurement of the Neutron Emission Spectrum Due to Thermonuclear and Higher-Order Reactions in Tokamak Plasmas(Ph.D.Thesis).Uppsala:Faculty of Sciences and Technology,Uppsala University,2003
19 Tardocchi M,Nocente M,Proverbio I et al.Phys.Rev.Letters,2012,107:205002
20 X-5 Monte Carlo Team.MCNP-A General Monte Carlo Nparticle Transport Code,Version 5,Report LA-UR-03-1987.Los Alamos National Laboratory,New Mexico,United States of America,2003
21 Dietze G,Klein H.Nucl.Instrum.Methods,1982,193:549
22 KleinHorst,NeumannSonja.Nucl.Instrum.Methods Phys.A,2002,476:132
23 Schlegel D.PTB Laboratory Report,PTB-6.42-05-2.Braunschweig,Germany,2005
24 Dietze G,Klein H.PTB LaboratoryReport,PTB-ND-22,Braunschweig,Germany,1982
25 Wolski D,Moszyiiski M,Ludziejewski T et al.Nucl.Instrum.Methods Phys.A,1995,360:584
26 ZHANG Xing,YUAN Xi,XIE Xu-Fei et al.Nucl.Instrum.Methods Phys.A,2012,687:7
27 XIE Xu-Fei,ZHANG Xing,YUAN Xi et al.Rev.Sci.Instrum.,2012,83:093507
2 Jarvis O N.Plasma Phys.Control.Fusion,1994,36:209
3 Hellesen C,Gatu Johnson M,Sund′en E A et al.Nucl.Fusion,2010,50:084006
4 White R B,Chance M S.Phys.Fluids,1984,27(10):2455
5 CHEN W,DING X T,LIU Yi et al.Nucl.Fusion,2010,50:084008
6 YANG Q W,LIU Yong,DING X T et al.Nucl.Fusion,2007,47:635
7 Ka¨llne J,Ballabio L,Gorini G et al.Phys.Rev.Lett.,2001,85:1246
8 Hellesen C,Gatu Johnson M,Sund′en E A et al.Nucl.Fusion,2010,50:022001
9 Hellesen C,Albergante M,Sund′en E A et al.Nucl.Fusion,2010,52:085013
10 Zimbal A,Reginatto M,Schuhmacher H et al.Rev.Sci.Instrum.,2004,75:3553
11 Esposito B,Bertalot L,Marocco D et al.Rev.Sci.Instrum.,2004,75:3550
12 Giacomelli L,Zimbal A,Tittelmeier K et al.Rev.Sci.Instrum.,2011,82:123504
13 Esposito B,Kaschuck Y,Rizzo A et al.Nucl.Instrum.Methods Phys.Res.A,2004,518:626
14 Shibata Y,Hoek M,Nishitani T et al.Japan Atomic Energy Research Institute Report,JAERI-Conf.,2000–004.130–133
15 Cecconello M,Turnyanskiy M,Conroy S et al.Rev.Sci.Instrum.,2010,81:10D315
16 LI X L,WAN B N,ZHONG G Q et al.Plasma Phys.Control.Fusion,2010,52:105006
17 Pankin A,McCune D,Bateman G et al.Computer Physics Communications,2004,159:157
18 Ballabio L.Calculation and Measurement of the Neutron Emission Spectrum Due to Thermonuclear and Higher-Order Reactions in Tokamak Plasmas(Ph.D.Thesis).Uppsala:Faculty of Sciences and Technology,Uppsala University,2003
19 Tardocchi M,Nocente M,Proverbio I et al.Phys.Rev.Letters,2012,107:205002
20 X-5 Monte Carlo Team.MCNP-A General Monte Carlo Nparticle Transport Code,Version 5,Report LA-UR-03-1987.Los Alamos National Laboratory,New Mexico,United States of America,2003
21 Dietze G,Klein H.Nucl.Instrum.Methods,1982,193:549
22 KleinHorst,NeumannSonja.Nucl.Instrum.Methods Phys.A,2002,476:132
23 Schlegel D.PTB Laboratory Report,PTB-6.42-05-2.Braunschweig,Germany,2005
24 Dietze G,Klein H.PTB LaboratoryReport,PTB-ND-22,Braunschweig,Germany,1982
25 Wolski D,Moszyiiski M,Ludziejewski T et al.Nucl.Instrum.Methods Phys.A,1995,360:584
26 ZHANG Xing,YUAN Xi,XIE Xu-Fei et al.Nucl.Instrum.Methods Phys.A,2012,687:7
27 XIE Xu-Fei,ZHANG Xing,YUAN Xi et al.Rev.Sci.Instrum.,2012,83:093507