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Title: | A differential electrometer for vector electric field measurements on a balloon platform |
Authors: | Jawahar, K. Manu, S. Gurubaran, S. |
Keywords: | Atmospheric electric field Atmospheric electricity Stratosphere Double-Langmuir probe technique Balloon experiment |
Issue Date: | 2016 |
Citation: | Current Science, 111, 4, 624-626 |
Abstract: | Vector measurements of middle atmospheric electric fields are mostly carried out using a double-Langmuir probe technique on platforms like balloons and rockets. High impedances (up to 1013 ohms) and low signal levels (~few millivolts) are the factors that are to be considered in the design of an electrometer for one such experiment. Here, we offer a simple circuit concept that invokes an instrumentation amplifier capable of meeting our several needs, namely generating the guard voltage, ultra-high impedance (1015 ohms) input terminals, femtoampere bias current, differencing, gain setting, etc. all in one package. A three-channel differential electrometer was developed based on this concept and flown on a high-altitude balloon platform. Results reveal that the instrument is capable of detecting weak electric field variations at stratospheric altitudes. |
URI: | http://localhost:8080/xmlui/handle/123456789/1058 |
Appears in Collections: | UAS_Reprints |
Files in This Item:
File | Description | Size | Format | |
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CS, 111, 4, 624-626, 2016.pdf | Reprints | 792.56 kB | Adobe PDF | View/Open |
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