CAJ | 학술논문

为减少中子注量的损失,中子反射谱仪的设计通常需要采用中子导管来传输,最前端为中子束流闸门.论文采用Mcstas模拟计算软件,分别针对闸门通道内表面是否为吸收材料,采用多种组合设计模型进行了模拟计算.结果表明:闸门内表面选用超镜材料对闸门与直导管的组合传输性能有较大的提高,并且发散度增大不明显,这对于分辨率要求不是特别高,位于中子反射谱仪最前端的部件设计是非常有利的.经过多组比较分析,针对水平发散度要求较高的水平散射几何中子反射谱仪的前端组合设计,闸门内表面最好选择因子m=1.5或m=2的超镜,而不是吸收材料.计算给出了不同组合的模拟结果,结果可为相关中子反射谱仪闸门与前端直导管的组合设计提供理论参考.
위감소중자주량적손실,중자반사보의적설계통상수요채용중자도관래전수,최전단위중자속류갑문.논문채용Mcstas모의계산연건,분별침대갑문통도내표면시부위흡수재료,채용다충조합설계모형진행료모의계산.결과표명:갑문내표면선용초경재료대갑문여직도관적조합전수성능유교대적제고,병차발산도증대불명현,저대우분변솔요구불시특별고,위우중자반사보의최전단적부건설계시비상유리적.경과다조비교분석,침대수평발산도요구교고적수평산사궤하중자반사보의적전단조합설계,갑문내표면최호선택인자m=1.5혹m=2적초경,이불시흡수재료.계산급출료불동조합적모의결과,결과가위상관중자반사보의갑문여전단직도관적조합설계제공이론삼고.
In order to reduce the loss of neutron flux,neutron reflectometer design usually use the neutron guide to transport neutron beam,forepart of the neutron reflectometer is the shutter.Simulation is done for the neutron absorbed material and different supermirror index of inner surface of the channel design model by Mcstas codes.The results shows that the inner surface of shutter use the supermirror can enhance the intensity of the exit of the focus neutron guide,and the divergence of the exit of focus neutron guide increase not much.It is very important for the forepart design of neutron reflectometer.which is not require hign resolution.After analysis of the different group design.For the forepart design of the horizontal scattering geometry reflectometer which no high requiring of horizontal divergence.the inner surface supermirror index of the shutter should be selected m=1.5 or m=2.Calculation gives out combination results,The different simulation results can be the theoretical reference for the forepart design of neutron reflectometer.