Cosmic Ray Flux Variation due to Solar Flares during January 16—20, 2005 with YBJ-ARGO Experiment

WANG Min-Jie; JIA Huan-Yu

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 2007, Vol. 31> Issue(1) : 34-37

Cosmic Ray Flux Variation due to Solar Flares during January 16—20, 2005 with YBJ-ARGO Experiment

WANG Min-Jie ,
JIA Huan-Yu ^,

Institute of Modern Physics, Southwest Jiaotong University, Chengdu 610031, China

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Abstract：
The YBJ-ARGO experiment is located in Tibet at 4300m a.s.l.. The data of this experiment under scalar mode can be used to study the solar modulation of cosmic ray flux at E>10GeV. The data during January 15—17, 2005 are analyzed, and a cosmic ray flux Forbush decrease after several X class solar flares has been observed. All detailed structures of the flux curves are similar to the results from neutron monitors. The maximum amplitudes of FD are about －6%, －6%, －4% and －3% with multiplicity greater than 1, 2, 3 and 4, respectively, i.e. the maximum amplitude of FD decreases as the energy of cosmic ray increases. These are the results about a FD measured at the same site (Yangbajing) with different cosmic ray energies for the first time.

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WANG Min-Jie and JIA Huan-Yu. Cosmic Ray Flux Variation due to Solar Flares during January 16—20, 2005 with YBJ-ARGO Experiment[J]. Chinese Physics C, 2007, 31(1): 34-37.

WANG Min-Jie and JIA Huan-Yu. Cosmic Ray Flux Variation due to Solar Flares during January 16—20, 2005 with YBJ-ARGO Experiment[J]. Chinese Physics C, 2007, 31(1): 34-37. shu

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Received: 2006-04-27
Revised: 2006-06-16

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沈阳化工大学材料科学与工程学院沈阳 110142

Cosmic Ray Flux Variation due to Solar Flares during January 16—20, 2005 with YBJ-ARGO Experiment

WANG Min-Jie
JIA Huan-Yu ^,

Corresponding author: JIA Huan-Yu,

Institute of Modern Physics, Southwest Jiaotong University, Chengdu 610031, China

Received Date: 2006-04-27
Accepted Date: 2006-06-16
Available Online: 2007-01-05

Abstract: The YBJ-ARGO experiment is located in Tibet at 4300m a.s.l.. The data of this experiment under scalar mode can be used to study the solar modulation of cosmic ray flux at E>10GeV. The data during January 15—17, 2005 are analyzed, and a cosmic ray flux Forbush decrease after several X class solar flares has been observed. All detailed structures of the flux curves are similar to the results from neutron monitors. The maximum amplitudes of FD are about －6%, －6%, －4% and －3% with multiplicity greater than 1, 2, 3 and 4, respectively, i.e. the maximum amplitude of FD decreases as the energy of cosmic ray increases. These are the results about a FD measured at the same site (Yangbajing) with different cosmic ray energies for the first time.