The ion composition in solar energetic particle events observed in 1993-1995

Nobuyuki Hasebe; Tadayoshi Doke; Takayoshi Hayashi; Jun Kikuchii; Masanori Kobayashi; Hidekazu Shirai; Naohiro Takenaka; Takeshi Takashima; Brend Wilken; Quigan Zong

doi:10.1143/JPSJ.70.3167

The ion composition in solar energetic particle events observed in 1993-1995

Nobuyuki Hasebe^*, Tadayoshi Doke, Takayoshi Hayashi, Jun Kikuchii, Masanori Kobayashi, Hidekazu Shirai, Naohiro Takenaka, Takeshi Takashima, Brend Wilken, Quigan Zong

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Five large events of solar energetic particles (SEP) during three years from 1993 to 1995 have been observed by high energy particle (HEP) instruments onboard GEOTAIL spacecraft. The composition of energetic ions, their energy spectra and time profiles of ion intensity were measured for the SEP events. Three SEP events observed on Feb. 15, 1993, Mar. 4, 1993 and Oct. 20, 1994, are enriched in Fe ions (> 10 MeV/n). The enhancement of Fe ions was observed at the onset time of SEP events (Mar. 4, 1993 and Oct. 20, 1994). The onset of the SEP events seems to have a feature with "impulsive" and "gradual" characteristics. This indicates a mixture of different seed populations and acceleration processes operating in these events.

Original language	English
Pages (from-to)	3167-3173
Number of pages	7
Journal	Journal of the Physical Society of Japan
Volume	70
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.70.3167
Publication status	Published - 2001 Oct

Keywords

CME
Solar composition
Solar energetic particle
Solar flare

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.70.3167

Cite this

@article{4a70989a8144445db262e154f8f9d1b7,

title = "The ion composition in solar energetic particle events observed in 1993-1995",

abstract = "Five large events of solar energetic particles (SEP) during three years from 1993 to 1995 have been observed by high energy particle (HEP) instruments onboard GEOTAIL spacecraft. The composition of energetic ions, their energy spectra and time profiles of ion intensity were measured for the SEP events. Three SEP events observed on Feb. 15, 1993, Mar. 4, 1993 and Oct. 20, 1994, are enriched in Fe ions (> 10 MeV/n). The enhancement of Fe ions was observed at the onset time of SEP events (Mar. 4, 1993 and Oct. 20, 1994). The onset of the SEP events seems to have a feature with {"}impulsive{"} and {"}gradual{"} characteristics. This indicates a mixture of different seed populations and acceleration processes operating in these events.",

keywords = "CME, Solar composition, Solar energetic particle, Solar flare",

author = "Nobuyuki Hasebe and Tadayoshi Doke and Takayoshi Hayashi and Jun Kikuchii and Masanori Kobayashi and Hidekazu Shirai and Naohiro Takenaka and Takeshi Takashima and Brend Wilken and Quigan Zong",

year = "2001",

month = oct,

doi = "10.1143/JPSJ.70.3167",

language = "English",

volume = "70",

pages = "3167--3173",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "10",

}

TY - JOUR

T1 - The ion composition in solar energetic particle events observed in 1993-1995

AU - Hasebe, Nobuyuki

AU - Doke, Tadayoshi

AU - Hayashi, Takayoshi

AU - Kikuchii, Jun

AU - Kobayashi, Masanori

AU - Shirai, Hidekazu

AU - Takenaka, Naohiro

AU - Takashima, Takeshi

AU - Wilken, Brend

AU - Zong, Quigan

PY - 2001/10

Y1 - 2001/10

N2 - Five large events of solar energetic particles (SEP) during three years from 1993 to 1995 have been observed by high energy particle (HEP) instruments onboard GEOTAIL spacecraft. The composition of energetic ions, their energy spectra and time profiles of ion intensity were measured for the SEP events. Three SEP events observed on Feb. 15, 1993, Mar. 4, 1993 and Oct. 20, 1994, are enriched in Fe ions (> 10 MeV/n). The enhancement of Fe ions was observed at the onset time of SEP events (Mar. 4, 1993 and Oct. 20, 1994). The onset of the SEP events seems to have a feature with "impulsive" and "gradual" characteristics. This indicates a mixture of different seed populations and acceleration processes operating in these events.

AB - Five large events of solar energetic particles (SEP) during three years from 1993 to 1995 have been observed by high energy particle (HEP) instruments onboard GEOTAIL spacecraft. The composition of energetic ions, their energy spectra and time profiles of ion intensity were measured for the SEP events. Three SEP events observed on Feb. 15, 1993, Mar. 4, 1993 and Oct. 20, 1994, are enriched in Fe ions (> 10 MeV/n). The enhancement of Fe ions was observed at the onset time of SEP events (Mar. 4, 1993 and Oct. 20, 1994). The onset of the SEP events seems to have a feature with "impulsive" and "gradual" characteristics. This indicates a mixture of different seed populations and acceleration processes operating in these events.

KW - CME

KW - Solar composition

KW - Solar energetic particle

KW - Solar flare

UR - http://www.scopus.com/inward/record.url?scp=5644232283&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=5644232283&partnerID=8YFLogxK

U2 - 10.1143/JPSJ.70.3167

DO - 10.1143/JPSJ.70.3167

M3 - Article

AN - SCOPUS:5644232283

SN - 0031-9015

VL - 70

SP - 3167

EP - 3173

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 10

ER -

The ion composition in solar energetic particle events observed in 1993-1995

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this