Linjin Deng , Hui Cheng , Fan Ye , Shiyan Yang , Rongfeng Li , Chenyang Wang , Bao Yuan , Bo Bai , Mengjia Dou , Zhiqiang Huang , Jixin Chen , Haitao Hu , Xin Tong
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引用次数: 0
Abstract
Laser heating provides an ideal method for achieving ultra-high temperatures for the samples. The reduced experimental heating times, the increased maximum operation temperature as compared to metal foil furnaces, meet the demands for higher temperature sample environments. Moreover, the achievable rapid temperature changes reduce the ramping times during the experiments, thereby enhancing the utilization rate of neutrons. This paper shows the design of a neutron scattering laser heating system for China Spallation Neutron Source (CSNS) and describes the construction of a laser heating experimental platform based on a general-purpose laboratory furnace. In this study, directional heating experiments on tantalum rods in a vacuum environment were conducted using dual-side fiber lasers in the laser furnace. The dependence relationship between laser power and the maximal temperature ramp rate, the minimal stabilization time and the maximal temperature was studied. Analysis using a finite element model verified by experiments indicates that reducing the laser incidence angle can effectively enhance the uniformity of the temperature field in the sample. This finding provides an important theoretical basis for the optimization of laser heating equipment. The results reveal the intrinsic relationship between laser parameters and sample conditions, offering guidance for the performance optimization of future laser furnaces.
期刊介绍:
Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section.
Theoretical as well as experimental papers are accepted.