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Persistent URL http://purl.org/net/epubs/work/49549
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Record Id 49549
Title An infra-red filter radiometer for atmospheric cluster-ion detection
Abstract Motivated by the detection of infra-red absorption bands from atmospheric cluster- ions in laboratory experiments, a narrowband filter radiometer has been constructed for ion detection in the atmosphere. It uses a filter centred on 9.15 micron wavelength with 5% bandwidth, protected by a diamond-like carbon coated germanium auxiliary filter, and fitted to a standard pyrradiometer. A sensitivity of (29.3±0.1) V/(Wm-2) has been determined in a laboratory calibration using a blackbody source. Atmospheric experiments show that the filter radiometer, when used with a stable, low-noise amplifier, can respond to cluster-ion fluctuations. The filter radiometer's sensitivity to atmospheric ion changes is (0.47 ± 0.05) (mWm-2)/(ions cm-3).
Organisation SSTD , STFC
Keywords clusters , Physics , Natural environment , atmospheric electricity , cosmic rays , ionisation
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Language English (EN)
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Journal Article Rev Sci Instrum 79 (2008): 106107. doi:/10.1063/1.3002428 Aplin&McPheatRSI_Preprint.pdf 2008