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Electric field chan...
Electric field changes generated by preliminary breakdown pulse for positive lightning ground flashes in Sweden
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- Baharudin, Zikri Abadi (author)
- Uppsala universitet,Institutionen för teknikvetenskaper,Division of Electricity
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- Cooray, Vernon (author)
- Uppsala universitet,Institutionen för teknikvetenskaper,Division of Electricity
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- Rahman, Mahbubur (author)
- Uppsala universitet,Institutionen för teknikvetenskaper,Division of Electricity
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- Hettiarachchi, Pasan (author)
- Uppsala universitet,Institutionen för teknikvetenskaper,Division of Electricity
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- Ahmad, Noor Azlinda (author)
- Universiti Teknologi Malaysia,Institut Voltan dan Arus Tinggi
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(creator_code:org_t)
- English.
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- This is the new study of the electric field changes generated by the preliminary breakdown for positive cloud-to-ground flashes which concerning on the association of slow field changes in preliminary breakdown process. In this study, a 107 positive cloud-to-ground lightning flashes recorded from the total of 14 thunderstorms generated by the whole flash were examined. The electric fields were measured with nanosecond resolution by using the slow electric field, fast electric field and narrowband radiation field at 3 and 30 MHz signals simultaneously. Our result shows that there is a pre-starting time, i.e. the duration between the first preliminary breakdown pulse and slow field changes starting point, which is found to be after the first preliminary breakdown pulse. The pre-starting time has the arithmetic mean – 3.0 ms and geometric mean – 1.8 ms, ranging from 0.3 to 21.7 ms. This study is consistent with the latest finding for the slow field changes in negative ground flashes where the slow field changes never start before the preliminary breakdown process.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- Positive cloud-to-ground lightning flashes
- Initiation position
- slow field changes
- close ground flashes
- preliminary breakdown process
- Engineering Science with specialization in Atmospheric Discharges
- Teknisk fysik med inriktning mot atmosfäriska urladdningar
Publication and Content Type
- vet (subject category)
- ovr (subject category)
- kfu (subject category)
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