The paper presents a morphological study of real time magnetocardiograms(MCGs) of a normal subject.The MCGs were measured by using a 3 D second order gradiometer connected to three rf SQUIDs in a prefabricated magneti...The paper presents a morphological study of real time magnetocardiograms(MCGs) of a normal subject.The MCGs were measured by using a 3 D second order gradiometer connected to three rf SQUIDs in a prefabricated magnetically shielded room.The base line of the detecting coil for Bz is 2.8 cm and that of the coil for Bx and By is 1.4 cm.The magnetic field components perpendicular to the chest (Bz component )and tangential to the chest (Bx,By components) were studied.From isofield contour maps and arrow maps of the QRS wave of the MCG,when multiple sources exist simulataneously,we can infer the locations and positions of different sources by combining the Bz component with the Bx and By components.The analyzed results showed that a method using a 3 D second order gradiometer that we developed is useful for discriminating the directions and locations of multiple sources.展开更多
The InjectorⅡ, one of the two parallel injectors of the high-current superconducting proton driver linac for the China Accelerator-Driven System （C-ADS） project, is being designed and constructed by the Institute o...The InjectorⅡ, one of the two parallel injectors of the high-current superconducting proton driver linac for the China Accelerator-Driven System （C-ADS） project, is being designed and constructed by the Institute of Modern Physics. At present, the design work for the injector is almost finished. End-to-end simulation has been carried out using the TRACK multiparticle simulation code to check the match between each acceleration section and the performance of the injector as a whole. Moreover, multiparticle simulations with all kinds of errors and misalignments have been performed to define the requirements of each device. The simulation results indicate that the lattice design is robust. In this paper, the results of end-to-end simulation and error simulation with a 3-D field map are presented.展开更多
基金This work was supported in part by the Foundation of Guangdong Educational Committee （2014KTSCX191） and the National Natural Science Foundation of China （61201087）.
文摘The paper presents a morphological study of real time magnetocardiograms(MCGs) of a normal subject.The MCGs were measured by using a 3 D second order gradiometer connected to three rf SQUIDs in a prefabricated magnetically shielded room.The base line of the detecting coil for Bz is 2.8 cm and that of the coil for Bx and By is 1.4 cm.The magnetic field components perpendicular to the chest (Bz component )and tangential to the chest (Bx,By components) were studied.From isofield contour maps and arrow maps of the QRS wave of the MCG,when multiple sources exist simulataneously,we can infer the locations and positions of different sources by combining the Bz component with the Bx and By components.The analyzed results showed that a method using a 3 D second order gradiometer that we developed is useful for discriminating the directions and locations of multiple sources.
基金Supported by National Natural Science Foundation of China (91026001)
文摘The InjectorⅡ, one of the two parallel injectors of the high-current superconducting proton driver linac for the China Accelerator-Driven System （C-ADS） project, is being designed and constructed by the Institute of Modern Physics. At present, the design work for the injector is almost finished. End-to-end simulation has been carried out using the TRACK multiparticle simulation code to check the match between each acceleration section and the performance of the injector as a whole. Moreover, multiparticle simulations with all kinds of errors and misalignments have been performed to define the requirements of each device. The simulation results indicate that the lattice design is robust. In this paper, the results of end-to-end simulation and error simulation with a 3-D field map are presented.
