A computer-controlled Gerdien atmospheric ion counter
A computer-controlled Gerdien atmospheric ion counter
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DOI：
10.1063/1.1305511
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发表时间：
2000-08-01
影响因子：
1.6
通讯作者：
Harrison, RG
中科院分区：
文献类型：
--
作者：
Aplin, KL;Harrison, RG
为了研究大气气溶胶过程，需要对大气离子进行精确测量。描述了一种圆柱形电容离子计数器，它具有灵活的计算机控制系统，允许通过改变电容器两端的偏置电压来选择离子迁移率。获得的离子测量结果与邻近盖革计数器在清洁空气中测量的电离率有很好的相关性。使用该装置在电流和电压衰减模式下对空气离子进行了测量，结果一致。收集电极直接暴露在待采样的气流中，消除了进气管中的扩散损失。该系统可以测量20个离子厘米(-3)的离子浓度(包括典型的大气浓度)，并能快速采集离子。这些特性使得能够进行全面的空气传导性测量。(C)2000年美国物理研究所。[S0034-6748(00)03208-1]。
Accurate measurements of atmospheric ions are desirable in order to investigate atmospheric aerosol processes. A cylindrical capacitor ion counter is described which has a flexible computerized control system, to allow selection of ion mobility by changing the bias voltage across the capacitor. Ion measurements obtained correlate well with the ionization rate measured with an adjacent Geiger counter in clean air. Measurements of air ions using the device in current and voltage decay modes show consistent results. The collecting electrode is exposed directly in the air stream to be sampled, eliminating diffusive losses in intake tubes. The system can measure ion concentrations from 20 ions cm(-3) (including typical atmospheric concentrations) and can sample ions rapidly. These characteristics enable comprehensive air conductivity measurements to be made. (C) 2000 American Institute of Physics. [S0034- 6748(00)03208-1].