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arXiv 1502.04007physics.chem-phphysics.ins-det
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非均匀探测的速度图成像:通过库仑爆炸成像进行定量分子轴排列测量

Velocity map imaging with non-uniform detection: quantitative molecular axis alignment measurements via Coulomb explosion imaging

Jonathan G. Underwood, I. Procino, L. Christiansen, J. Maurer, H. Stapelfeldt

摘要:

提出了一种利用非均匀探测函数反演带电粒子速度图的方法。该方法适用于从库仑爆炸成像探针中提取分子轴对齐的特定情况,其中探针本身依赖于分子取向,这通常从实验中去除圆柱对称性,并防止使用标准反演技术来恢复分子轴分布。通过结合已知的检测功能,可以去除库仑爆炸探针过程的角度偏差并反转图像以允许定量测量分子轴对准的程度。

英文摘要:

We present a method for inverting charged particle velocity map images which incoorporates a non-uniform detection function. This method is applied to the specific case of extracting molecular axis alignment from Coulomb explosion imaging probes in which the probe itself has a dependence on molecular orientation which often removes cylindrical symmetry from the experiment and prevents the use of standard inversion techniques for the recovery of the molecular axis distribution. By incorporating the known detection function, it is possible to remove the angular bias of the Coulomb explosion probe process and invert the image to allow quantitative measurement of the degree of molecular axis alignment.

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