scholarly journals On the relationship between cosmic rays detected by the KACST muon detector and solar wind speed and sunspot number

2017 ◽  
Author(s):  
Abdullrahman Maghrabi ◽  
H.M. Al Dajani
Keyword(s):  
Solar Wind ◽  
Wind Speed ◽  
Cosmic Rays ◽  
Sunspot Number ◽  
Solar Wind Speed ◽  
Muon Detector ◽  
The Relationship

Galactic cosmic-ray modulation effect by solar-wind streams

1995 ◽  
Vol 73 (9-10) ◽  
pp. 642-646 ◽  
Author(s):  
M. A. El-Borie
Keyword(s):  
Solar Wind ◽  
Wind Speed ◽  
Cosmic Rays ◽  
Solar Wind Speed ◽  
Cosmic Ray ◽  
Diurnal Variations ◽  
Solar Cycles ◽  
Mean Values ◽  
Wind Speeds ◽  
Cosmic Ray Modulation

Data, from the worldwide network of neutron monitors, recorded at Deep River, Hermanus, Rome, Tokyo, and Huancayo, over two solar cycles (Nos. 20 and 21) are analyzed to study the long-term variations of the solar diurnal variations as they relate to solar-wind speed. The median primary rigidities of response (Rm) for these detectors cover the range 16 GV ≤ Rm ≤ 33 GV. We discuss the solar diurnal variations (amplitude and phase) of cosmic rays as a function of solar activity. The behavior of solar diurnal phases is completely different for the two epochs of high-wind speed. Data of solar-wind speed from 1966–1986 are classified according to the state of the daily mean values. Variation in the amplitudes of the diurnal variations, as functions of the median primary rigidity of cosmic rays, for the two selected periods (1973–1975 and 1979–1981) of high and low solar-wind speeds were determined at the selected stations. The rigidity dependence of the averaged solar diurnal variations of cosmic rays related to the high solar-wind speed was studied. The most sensitive rigidity of modulation is around 20 and 30 GV during the 1973–1975 and 1979–1981 periods, respectively. Our results also show that there is a significant correlation in the solar diurnal amplitudes between the two divisions of high and low solar-wind speed days.

A study of the modulation regions causing 27-day cosmic-ray variations

1968 ◽  
Vol 46 (10) ◽  
pp. S970-S972 ◽  
Author(s):  
M. V. Alania ◽  
L. Kh. Shatashvili ◽  
L. I. Dorman
Keyword(s):  
Solar Wind ◽  
Wind Speed ◽  
Sunspot Number ◽  
Interplanetary Medium ◽  
Solar Wind Speed ◽  
Cosmic Ray ◽  
Effective Size ◽  
Neutron Data ◽  
Cosmic Ray Intensity ◽  
Sunspot Data

This is an attempt to determine the effective size of the interplanetary medium responsible for the 27-day variation in the cosmic-ray intensity. Neutron data from Mt. Norikura and Climax have been correlated with sunspot data for 80 solar revolutions beginning July 1957. The size of the modulating region was estimated from the lag between the sunspot number and the cosmic-ray variations, assuming the solar wind speed to be 400 km s−1, and it was found to be comparable with, or less than, the effective size of the modulating region causing the 11-year variation.

The Relationship between Corotating Energetic Ion Enhancement and Solar Wind Speed at 1 AU

1998 ◽  
Vol 67 (11) ◽  
pp. 3991-3996 ◽  
Author(s):  
Masanori Kobayashi ◽  
Tadayoshi Doke ◽  
Jun Kikuchi ◽  
Takayoshi Hayashi ◽  
Takeshi Takashima ◽  
...  
Keyword(s):  
Solar Wind ◽  
Wind Speed ◽  
Solar Wind Speed ◽  
The Relationship
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