物理学报Issue(16)：1-7,7.DOI:10.7498/aps.62.162801
装置极化效率对极化中子成像质量的影响及修正分析*
Effect of apparatus polarization efficiency on quantification analysis in polarized neutron imaging*
摘要
Abstract
Polarized neutron radiography allows the direct and real-space visualization of magnetic field distribution by detecting the polar-ization change in the transmitted beam. Spin polarizer/analyzer apparatus is important in polarized neutron imaging system, whose polarization efficiency directly affects the imaging quality of magnetic field. In this paper, the relation between the registered neutron intensity and magnetic field distribution is re-calculated after introducing the polarization efficiency parameter. Bender polarizers and 3 He spin filters are simulated by Monte Carlo software VITESS to verify the calculation. The quantification ability with low beam po-larization is also analyzed by considering the beam monochromaticity and bender geometry. The results will be helpful for processing image data and designing instrument.关键词
极化效率/中子照相/磁场成像Key words
polarization efficiency/neutron radiography/magnetic field imaging引用本文复制引用
曹超,李航,霍合勇,唐科,孙勇..装置极化效率对极化中子成像质量的影响及修正分析*[J].物理学报,2013,(16):1-7,7.基金项目
国家自然科学基金青年科学基金(批准号:11205138)和中国工程物理研究院科学基金(批准号:2012130103004)资助的课题.*Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No.11205138) and the Science Foundation of China Academy of Engineering Physics, China (Grant No.2012130103004) （批准号:11205138）
