CAJ | 학술논문

不同实验样品精度需求对中子反射谱仪的分辨要求不同.为实现反射谱仪中的中子斩波器的斩波特性可调,斩波器设计采用四斩盘结构.设计原理主要是变换使用第三和第四斩盘,利用第三盘和第四盘与第二盘问距的不同,结合斩盘转速的调节,实现斩波特性可调.运用Mcstas程序软件模拟计算,获得客观物理条件下相关物理参数对脉冲注量率及脉冲水平发散度的影响曲线.计算结果可为水平散射几何中子反射谱仪中四盘斩波器的理论设计及相关物理参数的选择提供理论参考.
불동실험양품정도수구대중자반사보의적분변요구불동.위실현반사보의중적중자참파기적참파특성가조,참파기설계채용사참반결구.설계원리주요시변환사용제삼화제사참반,이용제삼반화제사반여제이반문거적불동,결합참반전속적조절,실현참파특성가조.운용Mcstas정서연건모의계산,획득객관물리조건하상관물리삼수대맥충주량솔급맥충수평발산도적영향곡선.계산결과가위수평산사궤하중자반사보의중사반참파기적이론설계급상관물리삼수적선택제공이론삼고.
Different samples need different resolution requirements of a neutron reflectometer.To achieve this,a space-adjustable neutron chopper with four disks was designed.The principle is adjusting the disk rotation frequency, according to the space difference from the 2~# disk to the 3~# and disks.The new design Was simulated with Mcstas codes,and the intensity and horizontal divergence as function of different physical parameters in given conditions were obtained.The results provide theoretical basis for designing the four-disk chopper of a horizontal geometry scattering neutron reflectometer.