cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.57760/sciencedb.04270
title: Electromagnetic force evaluation on the water cooled ceramic breeder blanket for CFETR
title: Electromagnetic force evaluation on the water cooled ceramic breeder blanket for CFETR

description: The Water Cooled Ceramic Breeder (WCCB) blanket is one of the blanket candidates for Chinese Fusion Engineering Test Reactor (CFETR). To investigate the electromagnetic (EM) force (magnetization force and Lorentz force) on the WCCB blanket, EM analyses were carried out using ANSYS Multiphysics code. At first, finite element (FE) static magnetic analysis under normal operation condition was accomplished, adopting the magnetic scalar potential (MSP) method. The magnetization force can be obtained as a result. Then transientmagnetic analysis under plasma disruption event was performed using the magnetic vector potential (MVP) method. The eddy current on blankets was subsequently analyzed. Finally, the Lorentz force applied on blankets can be calculated with cross-product of the eddy current field from transient magnetic analysis and the magnetic field from the static magnetic analysis. The EM forces will be used as mechanical loads for the future structural analysis of blanket under integrated load.
description: The Water Cooled Ceramic Breeder (WCCB) blanket is one of the blanket candidates for Chinese Fusion Engineering Test Reactor (CFETR). To investigate the electromagnetic (EM) force (magnetization force and Lorentz force) on the WCCB blanket, EM analyses were carried out using ANSYS Multiphysics code. At first, finite element (FE) static magnetic analysis under normal operation condition was accomplished, adopting the magnetic scalar potential (MSP) method. The magnetization force can be obtained as a result. Then transientmagnetic analysis under plasma disruption event was performed using the magnetic vector potential (MVP) method. The eddy current on blankets was subsequently analyzed. Finally, the Lorentz force applied on blankets can be calculated with cross-product of the eddy current field from transient magnetic analysis and the magnetic field from the static magnetic analysis. The EM forces will be used as mechanical loads for the future structural analysis of blanket under integrated load.
DOI: 10.57760/sciencedb.04272
title: Design and analysis of mock-up of CFETR water cooled ceramic blanket for neutronics experiment
title: Design and analysis of mock-up of CFETR water cooled ceramic blanket for neutronics experiment

description: The water cooled ceramic breeder (WCCB) blanket is one of the blanket candidates for China Fusion Engineering Test Reactor (CFETR). The neutronics experiment of the WCCB blanket is to validate the neutron transport codes and nuclear data libraries. A scaled down mock-up of the WCCB blanket should be designed considering constraints of economic costs and experimental conditions before the neutronics experiment. In this work, the mockup was designed keeping neutronics and geometric characteristics of the original equatorial outboard blanket module of CFETR. The radial arrangement of the mock-up was designed firstly, including tungsten armor, first wall, breeding zone 1, beryllium layer 1, cooling plate 1, breeding zone 2, beryllium layer 2, cooling plate 2. Then the toroidal and poloidal dimensions of mock-up were optimized. Five mock-ups with the same radial arrangement and different toroidal and poloidal dimensions were selected as initial mock-ups. The nuclear response of these five mock-ups, including neutron intensity, neutron spectra and tritium production rate were analyzed. After the optimization, the size of the experimental mock-up was determined as 20.00 cm (Toroidal) × 20.00 cm (Poloidal) × 17.27 cm (Radial). The analyzed results showed that the neutronics performance of the mock-up were similar with the real blanket module and it can be employed to carry out neutronics experiments.
description: The water cooled ceramic breeder (WCCB) blanket is one of the blanket candidates for China Fusion Engineering Test Reactor (CFETR). The neutronics experiment of the WCCB blanket is to validate the neutron transport codes and nuclear data libraries. A scaled down mock-up of the WCCB blanket should be designed considering constraints of economic costs and experimental conditions before the neutronics experiment. In this work, the mockup was designed keeping neutronics and geometric characteristics of the original equatorial outboard blanket module of CFETR. The radial arrangement of the mock-up was designed firstly, including tungsten armor, first wall, breeding zone 1, beryllium layer 1, cooling plate 1, breeding zone 2, beryllium layer 2, cooling plate 2. Then the toroidal and poloidal dimensions of mock-up were optimized. Five mock-ups with the same radial arrangement and different toroidal and poloidal dimensions were selected as initial mock-ups. The nuclear response of these five mock-ups, including neutron intensity, neutron spectra and tritium production rate were analyzed. After the optimization, the size of the experimental mock-up was determined as 20.00 cm (Toroidal) × 20.00 cm (Poloidal) × 17.27 cm (Radial). The analyzed results showed that the neutronics performance of the mock-up were similar with the real blanket module and it can be employed to carry out neutronics experiments.
DOI: 10.57760/sciencedb.04284
title: Immobilization of N-acetylneuraminic acid aldolase and properties of the Immobilized Enzyme
title: N-乙酰神经氨酸醛缩酶的固定化及固定化酶性质研究

description: N-acetylneuraminic acid aldolase (NAL) was immobilized using LX-1000HFA amino resin. The immobilization conditions were optimized, and the enzymatic properties and stabilities of free and immobilized enzymes were compared. The optimum conditions of immobilization were obtained that the quantity of carrier was 5.0 g, the immobilization time was 12 h, the buffer concentration was 1.0 mol/L, the pH was 7.5, and the temperature was 25 ℃.The prepared immobilized NAL has the highest viability and the enzyme activity could reach 200 U/g wet resin. Compared with the free enzyme, the optimum reaction temperature was increased by 5 ℃, the optimum reaction pH was not changed, and thermal - stability and operating – stability were significantly improved. At the same time, the storage stability and operational stability of the immobilized enzyme were also greatly enhanced. Only 6% of the enzyme activity is lost after storage for 10 days at 4 ℃. And the immobilized enzyme retained 80% enzyme activity after repeated usage for 10 times. The immobilized enzyme had good thermal stability, pH stability, storage stability, and operational stability, which provided a theoretical basis for the industrial production of N-acetylneuraminic acid by enzymatic method.
description: N-acetylneuraminic acid aldolase (NAL) was immobilized using LX-1000HFA amino resin. The immobilization conditions were optimized, and the enzymatic properties and stabilities of free and immobilized enzymes were compared. The optimum conditions of immobilization were obtained that the quantity of carrier was 5.0 g, the immobilization time was 12 h, the buffer concentration was 1.0 mol/L, the pH was 7.5, and the temperature was 25 ℃.The prepared immobilized NAL has the highest viability and the enzyme activity could reach 200 U/g wet resin. Compared with the free enzyme, the optimum reaction temperature was increased by 5 ℃, the optimum reaction pH was not changed, and thermal - stability and operating – stability were significantly improved. At the same time, the storage stability and operational stability of the immobilized enzyme were also greatly enhanced. Only 6% of the enzyme activity is lost after storage for 10 days at 4 ℃. And the immobilized enzyme retained 80% enzyme activity after repeated usage for 10 times. The immobilized enzyme had good thermal stability, pH stability, storage stability, and operational stability, which provided a theoretical basis for the industrial production of N-acetylneuraminic acid by enzymatic method.
DOI: 10.57760/sciencedb.04276
title: Measurements and Model Calculations of Activation Reaction Rate for (n, p) Reaction on 54Fe Isotope
title: Measurements and Model Calculations of Activation Reaction Rate for (n, p) Reaction on 54Fe Isotope

description: In China Fusion Engineering Testing Reactor research, the neutronics experiment is essential in validating the neutronics codes and tools used in a blanket. Reduction activation ferritic–martensitic steel is the main structural material of the water-cooled ceramic breeder blanket, of which the main composition is Fe. However, the activation reaction of 54Fe(n, p)54Mn will bring the long half-life product of 54Mn. Therefore, the reaction rate of the reaction channel 54Fe(n, p)54Mn was investigated with accuracy in this paper. In a fusion reactor, neutron is generated not only from deuterium tritium reaction but also from the deuterium deuterium (DD) reaction. The spontaneous neutron source, 3 × 108 n/s 252Cf, was used to simulate DD neutron field. After irradiated for about 5 days, the activated Fe foil was measured by a high-resolution gamma-ray spectrometer with a high-purity germanium detector. The neutron flux was calculated using a Monte Carlo transport code and Fusion Evaluated Neutron Data Library (FENDL) 3.0 Files. The neutron group cross section was processed by NJOY. The relative error between the calculated value and the experimental value is less than 7%. The error of the database EAF2010 is the smallest in this paper. The self-shielding factor has a greater impact on FENDL 3.0 database.
description: In China Fusion Engineering Testing Reactor research, the neutronics experiment is essential in validating the neutronics codes and tools used in a blanket. Reduction activation ferritic–martensitic steel is the main structural material of the water-cooled ceramic breeder blanket, of which the main composition is Fe. However, the activation reaction of 54Fe(n, p)54Mn will bring the long half-life product of 54Mn. Therefore, the reaction rate of the reaction channel 54Fe(n, p)54Mn was investigated with accuracy in this paper. In a fusion reactor, neutron is generated not only from deuterium tritium reaction but also from the deuterium deuterium (DD) reaction. The spontaneous neutron source, 3 × 108 n/s 252Cf, was used to simulate DD neutron field. After irradiated for about 5 days, the activated Fe foil was measured by a high-resolution gamma-ray spectrometer with a high-purity germanium detector. The neutron flux was calculated using a Monte Carlo transport code and Fusion Evaluated Neutron Data Library (FENDL) 3.0 Files. The neutron group cross section was processed by NJOY. The relative error between the calculated value and the experimental value is less than 7%. The error of the database EAF2010 is the smallest in this paper. The self-shielding factor has a greater impact on FENDL 3.0 database.
DOI: 10.57760/sciencedb.07167
title: Analysis and Design of an Energy Verification System for SC200 Proton Therapy Facility
title: Analysis and Design of an Energy Verification System for SC200 Proton Therapy Facility

description: The purpose of this study is to provide an energy verification method for the nozzle of the SC200 proton therapy facility to ensure safe redundancy of treatment. This paper first introduces the composition of the energy selection system of the SC200 proton therapy facility. Secondly, according to IEC60601 standard, the energy verification requirement that correspond to 1 mm error in water is presented. The allowable difference between the measured magnetic field and the reference are calculated based on the energy verification requirements to select the field resolution of the Hall probe. To ensure accuracy and stability, two Hall probes are mounted on the dipole to monitor the magnetic field strength to verify the proton beam energy in real time. In addition, the test results of the residual field of the dipole show that the probe system meets the accuracy requirements of energy verification. Furthermore, the maximum width of the slit of the energy selection system in accordance with the IEC standard at the corresponding energy is calculated and compared with the actual position of the movable slit to verify the momentum divergence of the proton beam. Finally, we present an energy verification method.
description: The purpose of this study is to provide an energy verification method for the nozzle of the SC200 proton therapy facility to ensure safe redundancy of treatment. This paper first introduces the composition of the energy selection system of the SC200 proton therapy facility. Secondly, according to IEC60601 standard, the energy verification requirement that correspond to 1 mm error in water is presented. The allowable difference between the measured magnetic field and the reference are calculated based on the energy verification requirements to select the field resolution of the Hall probe. To ensure accuracy and stability, two Hall probes are mounted on the dipole to monitor the magnetic field strength to verify the proton beam energy in real time. In addition, the test results of the residual field of the dipole show that the probe system meets the accuracy requirements of energy verification. Furthermore, the maximum width of the slit of the energy selection system in accordance with the IEC standard at the corresponding energy is calculated and compared with the actual position of the movable slit to verify the momentum divergence of the proton beam. Finally, we present an energy verification method.
DOI: 10.57760/sciencedb.07166
title: Design of the Fast Scanning Magnets for SC200 Proton Therapy Facility
title: Design of the Fast Scanning Magnets for SC200 Proton Therapy Facility

description: At the Institute of Plasma Physics of the Chinese Academy of Sciences, a design of the pencil beam scanning nozzle is being planned. The main goal of the design is to meet the requirements of the radiation field and the scanning speed of the superconducting accelerators SC200 and to achieve a compact structure. Scanning magnets are one of the core components in the pencil beam scanning system and used to control the trajectory of the proton beam to form a radiation field to be tumor shape. This paper mainly discusses the physical considerations and requirements of the scanning system and scanning electromagnetic design. The tapered air gap of scanning magnet Y was used to accommodate the deflection envelope of the scanning magnet X. Since the two scanning magnets are excited by alternating currents and the maximum repetition frequency are up to 50 Hz and 12.5 Hz, respectively, eddy currents and losses are expected to be significant. To study the eddy current effect, the eddy current and steady-state thermal simulation of the magnet end plate were carried out, and the results of the simulation were discussed.
description: At the Institute of Plasma Physics of the Chinese Academy of Sciences, a design of the pencil beam scanning nozzle is being planned. The main goal of the design is to meet the requirements of the radiation field and the scanning speed of the superconducting accelerators SC200 and to achieve a compact structure. Scanning magnets are one of the core components in the pencil beam scanning system and used to control the trajectory of the proton beam to form a radiation field to be tumor shape. This paper mainly discusses the physical considerations and requirements of the scanning system and scanning electromagnetic design. The tapered air gap of scanning magnet Y was used to accommodate the deflection envelope of the scanning magnet X. Since the two scanning magnets are excited by alternating currents and the maximum repetition frequency are up to 50 Hz and 12.5 Hz, respectively, eddy currents and losses are expected to be significant. To study the eddy current effect, the eddy current and steady-state thermal simulation of the magnet end plate were carried out, and the results of the simulation were discussed.
DOI: 10.57760/sciencedb.07165
title: Design and field measurement of a dipole magnet for a newly developed superconducting proton cyclotron beamline
title: Design and field measurement of a dipole magnet for a newly developed superconducting proton cyclotron beamline

description: The design, field quality optimization, multipole field analysis, and field measurement of a dipole for a newly developed superconducting proton cyclotron (SC200) beamline are presented in this paper. The maximum magnetic field of the dipole is 1.35 T; the bending radius is 1.6 m with a proton beam energy in the range of 70–200 MeV. The magnetic field was calculated with 2D and 3D simulations, and measured with a Hall mapping system. The pole shim and end chamfer were optimized to improve the field quality. Based on the simulated results, the multipole field components in the good-field region were studied to evaluate the field quality. The results showed that the field quality is better than ± 5 × 10−4 at 1.35 T with shimming and chamfering. For the transverse field homogeneity, the third-order (B3) and fifth-order (B5) components should be controlled with symmetrical shims. The second-order (B2) component was the main disturbance for the integral field homogeneity; it could be improved with an end chamfer. The magnet manufacturing and field measurement were performed in this project. The measurement results demonstrated that the magnetic design and field quality optimization of the 45° dipole magnet can achieve the desired high field quality and satisfy the physical requirements.
description: The design, field quality optimization, multipole field analysis, and field measurement of a dipole for a newly developed superconducting proton cyclotron (SC200) beamline are presented in this paper. The maximum magnetic field of the dipole is 1.35 T; the bending radius is 1.6 m with a proton beam energy in the range of 70–200 MeV. The magnetic field was calculated with 2D and 3D simulations, and measured with a Hall mapping system. The pole shim and end chamfer were optimized to improve the field quality. Based on the simulated results, the multipole field components in the good-field region were studied to evaluate the field quality. The results showed that the field quality is better than ± 5 × 10−4 at 1.35 T with shimming and chamfering. For the transverse field homogeneity, the third-order (B3) and fifth-order (B5) components should be controlled with symmetrical shims. The second-order (B2) component was the main disturbance for the integral field homogeneity; it could be improved with an end chamfer. The magnet manufacturing and field measurement were performed in this project. The measurement results demonstrated that the magnetic design and field quality optimization of the 45° dipole magnet can achieve the desired high field quality and satisfy the physical requirements.
DOI: 10.57760/sciencedb.04291
title: data-JCIS
title: data-JCIS

description: 新型ＰＯＭ光催化剂制备及性能研究
description: 新型ＰＯＭ光催化剂制备及性能研究
DOI: 10.57760/sciencedb.04296
title: The reflectance data set observed by the channel -type automated instrument deployed in the Dun Huang Radiometric Calibration Site from September 2018 to September 2019
title: 利用布设在敦煌辐射校正场的通道式自动化光谱观测仪器测得的从 2018 年 9 月至 2019 年 9 月的反射率实验数据

description: In order to meet the high-frequency on-orbit calibration requirements of the on-board load， the site automatic calibration technology is often used to invert the multi-spectral reflectance into the hyper spectral reflectance. We calculate the reflectance from Sept. 2018 to Sept. 2019 using a channel-type automated observation instrument deployed in the Dun Huang Radiometric Calibration Site. Furthermore we divide the data into several groups according to the difference in the solar zenith angles during the measurement process and employ the model of bidirectional reflectance distribution function (BRDF) for the consistency analysis of spectral shapes at different solar zenith angles.
description: In order to meet the high-frequency on-orbit calibration requirements of the on-board load， the site automatic calibration technology is often used to invert the multi-spectral reflectance into the hyper spectral reflectance. We calculate the reflectance from Sept. 2018 to Sept. 2019 using a channel-type automated observation instrument deployed in the Dun Huang Radiometric Calibration Site. Furthermore we divide the data into several groups according to the difference in the solar zenith angles during the measurement process and employ the model of bidirectional reflectance distribution function (BRDF) for the consistency analysis of spectral shapes at different solar zenith angles.
DOI: 10.57760/sciencedb.04298
title: Multi-Enzymatic Cascade One-Pot Biosynthesis of 30-Sialyllactose Using Engineered Escherichia coli
title: Multi-Enzymatic Cascade One-Pot Biosynthesis of 30-Sialyllactose Using Engineered Escherichia coli

description: Among the human milk oligosaccharides (HMOs), one of the most abundantoligosaccharides and has great benefits for human health is 3'-sialyllactose (3'-SL). Given its importantphysiological functions and the lack of cost-effective production processes, we constructed an in vitromulti-enzymatic cofactor recycling system for the biosynthesis of 3'-SL from a low-cost substrate.First, we constructed the biosynthetic pathway and increased the solubility of cytidine monophosphatekinase (CMK) with chaperones. We subsequently identified that -galactosidase (lacZ) affects theyield of 3'-SL, and hence with the lacZ gene knocked out, a 3.3-fold increase in the production of30-SL was observed. Further, temperature, pH, polyphosphate concentration, and concentrationof divalent metal ions for 30-SL production were optimized. Finally, an efficient biotransformationsystem was established under the optimized conditions. The maximum production of 3'-SL reached38.7 mM, and a molar yield of 97.1% from N-acetylneuraminic acid (NeuAc, sialic acid, SA) wasobtained. The results demonstrate that the multi-enzymatic cascade biosynthetic pathway withcofactor regeneration holds promise as an industrial strategy for producing 3'-SL.
description: Among the human milk oligosaccharides (HMOs), one of the most abundantoligosaccharides and has great benefits for human health is 3'-sialyllactose (3'-SL). Given its importantphysiological functions and the lack of cost-effective production processes, we constructed an in vitromulti-enzymatic cofactor recycling system for the biosynthesis of 3'-SL from a low-cost substrate.First, we constructed the biosynthetic pathway and increased the solubility of cytidine monophosphatekinase (CMK) with chaperones. We subsequently identified that -galactosidase (lacZ) affects theyield of 3'-SL, and hence with the lacZ gene knocked out, a 3.3-fold increase in the production of30-SL was observed. Further, temperature, pH, polyphosphate concentration, and concentrationof divalent metal ions for 30-SL production were optimized. Finally, an efficient biotransformationsystem was established under the optimized conditions. The maximum production of 3'-SL reached38.7 mM, and a molar yield of 97.1% from N-acetylneuraminic acid (NeuAc, sialic acid, SA) wasobtained. The results demonstrate that the multi-enzymatic cascade biosynthetic pathway withcofactor regeneration holds promise as an industrial strategy for producing 3'-SL.