Aitken nuclei sonde with constant expansion ratio irrespective of ambient pressure
A new type of Aitken nuclei sonde is reported. The sonde consists of an expansion fog chamber, which is similar in principle to the Pollak counter or the Aitken counter, as a measuring device of Aitken unclei concentration. The most important characteristics of the present fog chamber are that it is...
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Meteorological Research Institute
1983
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ftnipr:oai:nipr.repo.nii.ac.jp:00001513 2023-05-15T17:10:58+02:00 Aitken nuclei sonde with constant expansion ratio irrespective of ambient pressure Tomoyuki Ito Miwako Ikegami Izuo Kanazawa 1983-11 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1513 http://id.nii.ac.jp/1291/00001513/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1513&item_no=1&attribute_id=18&file_no=1 en eng Meteorological Research Institute https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1513 http://id.nii.ac.jp/1291/00001513/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 29, 185-190(1983-11) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1513&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1983 ftnipr 2022-11-12T19:42:23Z A new type of Aitken nuclei sonde is reported. The sonde consists of an expansion fog chamber, which is similar in principle to the Pollak counter or the Aitken counter, as a measuring device of Aitken unclei concentration. The most important characteristics of the present fog chamber are that it is a very compact automatic one and it has a construction to keep expansion ratio constant irrespective of ambient pressure. The constant expansion ratio is an essential requirement for the measurement of Aitken nuclei concentration at different heights by a balloon or an airplane. The variation of measured values during 50 times measurement for a same air sample is smaller than 3% of the mean. Two identical fog chambers in the present sonde give Aitken unclei concentrations which agree within 50(cm)^<-3> for the concentration range covering between about 200 and about 2000cm^<-3>. A nuclei measuring signal is inserted into rawinsonde signal, which is transmitted to a ground station, every minute for 10s. The total weight of a sonde is 9kg, comprising a 5kg fog chamber, a 3.5kg battery and a 0.5kg rawinsonde. Report Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
A new type of Aitken nuclei sonde is reported. The sonde consists of an expansion fog chamber, which is similar in principle to the Pollak counter or the Aitken counter, as a measuring device of Aitken unclei concentration. The most important characteristics of the present fog chamber are that it is a very compact automatic one and it has a construction to keep expansion ratio constant irrespective of ambient pressure. The constant expansion ratio is an essential requirement for the measurement of Aitken nuclei concentration at different heights by a balloon or an airplane. The variation of measured values during 50 times measurement for a same air sample is smaller than 3% of the mean. Two identical fog chambers in the present sonde give Aitken unclei concentrations which agree within 50(cm)^<-3> for the concentration range covering between about 200 and about 2000cm^<-3>. A nuclei measuring signal is inserted into rawinsonde signal, which is transmitted to a ground station, every minute for 10s. The total weight of a sonde is 9kg, comprising a 5kg fog chamber, a 3.5kg battery and a 0.5kg rawinsonde. |
format |
Report |
author |
Tomoyuki Ito Miwako Ikegami Izuo Kanazawa |
spellingShingle |
Tomoyuki Ito Miwako Ikegami Izuo Kanazawa Aitken nuclei sonde with constant expansion ratio irrespective of ambient pressure |
author_facet |
Tomoyuki Ito Miwako Ikegami Izuo Kanazawa |
author_sort |
Tomoyuki Ito |
title |
Aitken nuclei sonde with constant expansion ratio irrespective of ambient pressure |
title_short |
Aitken nuclei sonde with constant expansion ratio irrespective of ambient pressure |
title_full |
Aitken nuclei sonde with constant expansion ratio irrespective of ambient pressure |
title_fullStr |
Aitken nuclei sonde with constant expansion ratio irrespective of ambient pressure |
title_full_unstemmed |
Aitken nuclei sonde with constant expansion ratio irrespective of ambient pressure |
title_sort |
aitken nuclei sonde with constant expansion ratio irrespective of ambient pressure |
publisher |
Meteorological Research Institute |
publishDate |
1983 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1513 http://id.nii.ac.jp/1291/00001513/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1513&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
Aitken |
geographic_facet |
Aitken |
genre |
Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1513 http://id.nii.ac.jp/1291/00001513/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 29, 185-190(1983-11) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1513&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766067756677988352 |