Observation of Periodic and Transient Cosmic Ray Flux Variations by the Daejeon Neutron Monitor and the Seoul muon Detector
Recently, two instruments of cosmic ray are operating in South Korea. One is Seoul muon detector after October 1999 and the other is Daejeon neutron monitor (Kang et al. 2012) after October 2011. The former consists of four small plastic scintillators and the latter is the standard 18 NM 64 type....
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| Format: | Article |
| Language: | English |
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The Korean Space Science Society
2013-09-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2013/v30n3/OJOOBS_2013_v30n3_175.pdf |
| _version_ | 1797368554005200896 |
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| author | Suyeon Oh Jeongsoo Kang |
| author_facet | Suyeon Oh Jeongsoo Kang |
| author_sort | Suyeon Oh |
| collection | DOAJ |
| description | Recently, two instruments of cosmic ray are operating in South Korea. One is Seoul muon detector after October 1999 and the
other is Daejeon neutron monitor (Kang et al. 2012) after October 2011. The former consists of four small plastic scintillators
and the latter is the standard 18 NM 64 type. In this report, we introduce the characteristics of both instruments. We also
analyze the flux variations of cosmic ray such as diurnal variation and Forbush decrease. As the result, the muon flux shows
the typical seasonal and diurnal variations. The neutron flux also shows the diurnal variation. The phase which shows the
maximum flux in the diurnal variation is around 13-14 local time. We found a Forbush decrease on 7 March 2012 by both
instruments. It is also identified by Nagoya multi-direction muon telescope and Oulu neutron monitor. The observation of
cosmic ray at Jangbogo station as well as in Korean peninsula can support the important information on space weather in local
area. It can also enhance the status of Korea in the international community of cosmic ray experiments. |
| first_indexed | 2024-03-08T17:34:08Z |
| format | Article |
| id | doaj.art-df8ba293dd5148629cc0cc4cd8f79ded |
| institution | Directory Open Access Journal |
| issn | 2093-5587 2093-1409 |
| language | English |
| last_indexed | 2024-03-08T17:34:08Z |
| publishDate | 2013-09-01 |
| publisher | The Korean Space Science Society |
| record_format | Article |
| series | Journal of Astronomy and Space Sciences |
| spelling | doaj.art-df8ba293dd5148629cc0cc4cd8f79ded2024-01-02T13:35:32ZengThe Korean Space Science SocietyJournal of Astronomy and Space Sciences2093-55872093-14092013-09-0130317517810.5140/JASS.2013.30.3.175Observation of Periodic and Transient Cosmic Ray Flux Variations by the Daejeon Neutron Monitor and the Seoul muon DetectorSuyeon Oh0Jeongsoo Kang1Department of Astronomy and Space Science, Chungnam National University, Daejeon 305-764, KoreaDepartment of Nuclear Engineering, Hanyang University, Seoul 133-791, KoreaRecently, two instruments of cosmic ray are operating in South Korea. One is Seoul muon detector after October 1999 and the other is Daejeon neutron monitor (Kang et al. 2012) after October 2011. The former consists of four small plastic scintillators and the latter is the standard 18 NM 64 type. In this report, we introduce the characteristics of both instruments. We also analyze the flux variations of cosmic ray such as diurnal variation and Forbush decrease. As the result, the muon flux shows the typical seasonal and diurnal variations. The neutron flux also shows the diurnal variation. The phase which shows the maximum flux in the diurnal variation is around 13-14 local time. We found a Forbush decrease on 7 March 2012 by both instruments. It is also identified by Nagoya multi-direction muon telescope and Oulu neutron monitor. The observation of cosmic ray at Jangbogo station as well as in Korean peninsula can support the important information on space weather in local area. It can also enhance the status of Korea in the international community of cosmic ray experiments.http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2013/v30n3/OJOOBS_2013_v30n3_175.pdfcosmic rayneutron monitormuon detectordiurnal variationForbush decrease |
| spellingShingle | Suyeon Oh Jeongsoo Kang Observation of Periodic and Transient Cosmic Ray Flux Variations by the Daejeon Neutron Monitor and the Seoul muon Detector Journal of Astronomy and Space Sciences cosmic ray neutron monitor muon detector diurnal variation Forbush decrease |
| title | Observation of Periodic and Transient Cosmic Ray Flux Variations by the Daejeon Neutron Monitor and the Seoul muon Detector |
| title_full | Observation of Periodic and Transient Cosmic Ray Flux Variations by the Daejeon Neutron Monitor and the Seoul muon Detector |
| title_fullStr | Observation of Periodic and Transient Cosmic Ray Flux Variations by the Daejeon Neutron Monitor and the Seoul muon Detector |
| title_full_unstemmed | Observation of Periodic and Transient Cosmic Ray Flux Variations by the Daejeon Neutron Monitor and the Seoul muon Detector |
| title_short | Observation of Periodic and Transient Cosmic Ray Flux Variations by the Daejeon Neutron Monitor and the Seoul muon Detector |
| title_sort | observation of periodic and transient cosmic ray flux variations by the daejeon neutron monitor and the seoul muon detector |
| topic | cosmic ray neutron monitor muon detector diurnal variation Forbush decrease |
| url | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2013/v30n3/OJOOBS_2013_v30n3_175.pdf |
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