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Developing an optical chopper-modulated capacitive probe for measuring surface charge
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10.1063/1.2719600
/content/aip/journal/rsi/78/4/10.1063/1.2719600
http://aip.metastore.ingenta.com/content/aip/journal/rsi/78/4/10.1063/1.2719600
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematics of tuning-fork optical chopper (a), capacitive probe (b), and diagram of charge measurement geometry (c). All lengths are in inches.

Image of FIG. 2.
FIG. 2.

Inverse square relationship between probe response and probe-sample separation.

Image of FIG. 3.
FIG. 3.

Probe response vs chopping frequency using an SR540 rotary chopper.

Image of FIG. 4.
FIG. 4.

Probe response vs displacement from center of chopper blades. Each contour represents a reduction in signal.

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/content/aip/journal/rsi/78/4/10.1063/1.2719600
2007-04-03
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Developing an optical chopper-modulated capacitive probe for measuring surface charge
http://aip.metastore.ingenta.com/content/aip/journal/rsi/78/4/10.1063/1.2719600
10.1063/1.2719600
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