Size- and Composition-Dependent Response of the DAWN-A Multiangle Single-Particle Optical Detector
Size- and Composition-Dependent Response of the DAWN-A Multiangle Single-Particle Optical Detector
复制标题
DAWN-A 多角度单粒子光学探测器的尺寸和成分相关响应
DOI：
10.1080/02786829408959690
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发表时间：
1994
影响因子：
5.2
通讯作者：
J. Bottiger
中科院分区：
文献类型：
--
作者：
W. D. Dick;P. Mcmurry;J. Bottiger
DAWN-A差分光散射检测器（Wyatt等人，1988. 27：217-221）在实验室实验中表征。这项工作的目标包括测量的大小依赖的计数效率和角散射模式的球形颗粒的已知尺寸和组成。对直径在0.14-0.97 μm范围内的9种尺寸的聚苯乙烯乳胶（PSL）微球进行了计数，得到了计数效率与触发阈值的函数关系。发现计数效率随着颗粒尺寸的增加和触发阈值水平的降低而增加。观察到的最大计数效率在50%至60%的范围内，表明激光束的半宽度比散射体积中的粒子束的宽度窄约2倍。对于给定尺寸的颗粒，观察到脉冲高度的分布，反映了照明强度的可变性。PSL，癸二酸二辛酯（D…
The performance of the DAWN-A differential light-scattering detector (Wyatt et al., 1988. Appl. Opt. 27:217–221) was characterized in laboratory experiments. Objectives of this work included measurement of size-dependent counting efficiencies and of angular scattering patterns for spherical particles of known size and composition. Counting efficiencies for polystyrene latex (PSL) spheres of nine sizes in the 0.14–0.97-μm diameter range were obtained as a function of the trigger threshold level. Counting efficiencies were found to increase with increasing particle size and decreasing trigger threshold level. Maximum observed counting efficiencies were in the range of 50% to 60%, indicating that the half-width of the laser beam was about a factor of 2 narrower than the width of the particle beam in the scattering volume. A distribution of pulse heights was observed for particles of a given size, reflecting the variability of the illumination intensity. Angular scattering patterns of PSL, dioctyl sebacate (D...