The edge transport code SOLPS5.0 is used to model edge plasmas in the experi- mental shots on JT-60U and the profiles of the transverse particle and heat transport coefficients D, Xe and Xi along the outer midplane ar...The edge transport code SOLPS5.0 is used to model edge plasmas in the experi- mental shots on JT-60U and the profiles of the transverse particle and heat transport coefficients D, Xe and Xi along the outer midplane are obtained by fitting the simulational results to the experimental data in L-mode shot 39090 and H-mode shots 37851, 37856. The modelling and fitting results show that within the pedestal region in H-mode shots 37851 and 37856 the radial particle transport coefficient D exhibits a significant drop, but, for L-mode shot 39090, the obvious drop in both D and Xe was not found.展开更多
A simulation on HCSB-DEMO （helium-cooled solid breeder, HCSB） edge plasma, by using 2D edge plasma transport code SOLPS5.0, is presented. There is 400 MW heat power crossing CIB （core interface boundary）. The heat...A simulation on HCSB-DEMO （helium-cooled solid breeder, HCSB） edge plasma, by using 2D edge plasma transport code SOLPS5.0, is presented. There is 400 MW heat power crossing CIB （core interface boundary）. The heat flux profiles and peak flux at the divertor targets with different boundary densities axe investigated. It is indicated that the HCSB-DEMO divertor should operate at a proper upstream density in order to avoid a high heat flux at the divertor targets. When the upstream density is 0.63x 102~ m-3, the peak heat flux at the divertor targets will be above 17 MW/m2. The cross-field transport, the power crossing CIB and the power fraction taken by electrons and ions and SOL （scrape-off-layer） thickness are analyzed as unknown parameters. It is shown that the peak flux at the divertor target is very sensitive to these parameters. The simulation results will be used in the divertor design for HCSB-DEMO.展开更多
One of the critical issues to be solved for HL-2M is the power exhaust.Divertor target plate geometry strongly influences the plasma profiles by controlling the neutral recycling pattern,which in turn has a strong eff...One of the critical issues to be solved for HL-2M is the power exhaust.Divertor target plate geometry strongly influences the plasma profiles by controlling the neutral recycling pattern,which in turn has a strong effect on the symmetry and stability of the divertor plasma and finally on the whole edge region.The numerical simulation SOLPS5.0 package is used to design and explore the divertor target plates for HL-2M.We start with the choice of a proper target plate geometry,which has a smaller incidence angle in the permissible space,and then discuss the method of gas puffing to reduce the heat flux density on the target and the effects of gas puffing on the divertor plasma performance.展开更多
One of the critical issues to be solved for HL-2M is the power and particle exhaust. Divertor target plate geometry strongly influences the plasma profiles by controlling the neutral recycling pattern, which has in tu...One of the critical issues to be solved for HL-2M is the power and particle exhaust. Divertor target plate geometry strongly influences the plasma profiles by controlling the neutral recycling pattern, which has in turn a strong effect on the symmetry and stability of the divertor plasma and finally on the whole edge region. The numerical simulation software SOLPS5.0 Pack- age is used to design and explore the divertor target plates for HL-2M. We choose two divertor geometries, and assess the heat flux on the target plates and first wall, then further discuss the di- vertor plasma parameters, and how private flux baffling affects both neutral recirculation pattern and pumping efficiency.展开更多
A comparative study of SN （single null）, DDN （disconnected double-null） and DN （double null） diverters for HCSB-DEMO （helium-cooled solid breeder, HCSB） is reported in this paper by using the 2D edge plasma tr...A comparative study of SN （single null）, DDN （disconnected double-null） and DN （double null） diverters for HCSB-DEMO （helium-cooled solid breeder, HCSB） is reported in this paper by using the 2D edge plasma transport code SOLPS5.0. There is a heat power of 400 MW crossing CIB （core interface boundary）. The peak heat flux at targets with different upstream densities is investigated. It is indicated that the peak heat flux at the outer target with a SN diverter is lower than that at the outer-down target with a DDN diverter under the same upstream density, but is higher than that at the outer target with a DN diverter. The diverter should operate at a proper upstremn density to avoid strong high heat flux at the targets. The peak heat flux at the targets and first wail are sensitive to the SOL （scrape-off-layer） grid thickness. The simulated results wilt provide data for the design of diverter in HCSB-DEMO.展开更多
基金supported by National Natural Science Foundation of China （No. 10975158）, the National Magnetic Confinenmnt Fusion Research Program of China （Nos. 2009GB106002, 2010GB104005） and in part by the JSPS-CAS Core University program in the field of ＇Plasma and Nuclear Fusion＇
文摘The edge transport code SOLPS5.0 is used to model edge plasmas in the experi- mental shots on JT-60U and the profiles of the transverse particle and heat transport coefficients D, Xe and Xi along the outer midplane are obtained by fitting the simulational results to the experimental data in L-mode shot 39090 and H-mode shots 37851, 37856. The modelling and fitting results show that within the pedestal region in H-mode shots 37851 and 37856 the radial particle transport coefficient D exhibits a significant drop, but, for L-mode shot 39090, the obvious drop in both D and Xe was not found.
文摘A simulation on HCSB-DEMO （helium-cooled solid breeder, HCSB） edge plasma, by using 2D edge plasma transport code SOLPS5.0, is presented. There is 400 MW heat power crossing CIB （core interface boundary）. The heat flux profiles and peak flux at the divertor targets with different boundary densities axe investigated. It is indicated that the HCSB-DEMO divertor should operate at a proper upstream density in order to avoid a high heat flux at the divertor targets. When the upstream density is 0.63x 102~ m-3, the peak heat flux at the divertor targets will be above 17 MW/m2. The cross-field transport, the power crossing CIB and the power fraction taken by electrons and ions and SOL （scrape-off-layer） thickness are analyzed as unknown parameters. It is shown that the peak flux at the divertor target is very sensitive to these parameters. The simulation results will be used in the divertor design for HCSB-DEMO.
基金supported by the National Magnetic Confinement Fusion Science Program of China(No.2009GB104008)National Natural Science Foundation of China(Nos.10975048,11175061)
文摘One of the critical issues to be solved for HL-2M is the power exhaust.Divertor target plate geometry strongly influences the plasma profiles by controlling the neutral recycling pattern,which in turn has a strong effect on the symmetry and stability of the divertor plasma and finally on the whole edge region.The numerical simulation SOLPS5.0 package is used to design and explore the divertor target plates for HL-2M.We start with the choice of a proper target plate geometry,which has a smaller incidence angle in the permissible space,and then discuss the method of gas puffing to reduce the heat flux density on the target and the effects of gas puffing on the divertor plasma performance.
基金supported by the National Magnetic Confinement Fusion Science Program of China(No.2009GB104008)National Natural Science Foundation of China(Nos.10975048,11175061)
文摘One of the critical issues to be solved for HL-2M is the power and particle exhaust. Divertor target plate geometry strongly influences the plasma profiles by controlling the neutral recycling pattern, which has in turn a strong effect on the symmetry and stability of the divertor plasma and finally on the whole edge region. The numerical simulation software SOLPS5.0 Pack- age is used to design and explore the divertor target plates for HL-2M. We choose two divertor geometries, and assess the heat flux on the target plates and first wall, then further discuss the di- vertor plasma parameters, and how private flux baffling affects both neutral recirculation pattern and pumping efficiency.
文摘A comparative study of SN （single null）, DDN （disconnected double-null） and DN （double null） diverters for HCSB-DEMO （helium-cooled solid breeder, HCSB） is reported in this paper by using the 2D edge plasma transport code SOLPS5.0. There is a heat power of 400 MW crossing CIB （core interface boundary）. The peak heat flux at targets with different upstream densities is investigated. It is indicated that the peak heat flux at the outer target with a SN diverter is lower than that at the outer-down target with a DDN diverter under the same upstream density, but is higher than that at the outer target with a DN diverter. The diverter should operate at a proper upstremn density to avoid strong high heat flux at the targets. The peak heat flux at the targets and first wail are sensitive to the SOL （scrape-off-layer） grid thickness. The simulated results wilt provide data for the design of diverter in HCSB-DEMO.
