Comment on paper by D. B. Swinson, ‘Solar modulation origin of “sidereal” cosmic-ray anisotropies’

1972 ◽  
Vol 77 (7) ◽  
pp. 1342-1344 ◽  
Author(s):  
H. Elliot ◽  
T. Thambyahpillai ◽  
J. A. Otaola
Keyword(s):  
Cosmic Ray ◽  
Solar Modulation

scholarly journals Time dependence of the helium flux measured by PAMELA

2019 ◽  
Vol 209 ◽  
pp. 01004
Author(s):  
N. Marcelli ◽  
O. Adriani ◽  
G. C. Barbarino ◽  
G. A. Bazilevskaya ◽  
R. Bellotti ◽  
...  
Keyword(s):  
Energy Range ◽  
Time Dependence ◽  
Cosmic Radiation ◽  
Cosmic Ray ◽  
Space Experiment ◽  
Precision Measurements ◽  
Solar Modulation ◽  
Monthly Basis ◽  
The Galaxy ◽  
Crucial Information

Precision measurements of the Z = 2 component in cosmic radiation provide crucial information about the origin and propagation of the second most abundant cosmic ray species in the Galaxy (9% of the total). These measurements, acquired with the PAMELA space experiment orbiting Earth, allow to study solar modulation in details. Helium modulation is compared to the modulation of protons to study possible dependencies on charge and mass. The time dependence of helium fluxes on a monthly basis measured by PAMELA has been studied for the period between July 2006 to January 2016 in the energy range from 800 MeV/n to ~ 20 GeV/n.

scholarly journals Solar modulation of the deep space galactic cosmic ray lineal energy spectrum measured by CRaTER, 2009–2014

Space Weather ◽  
2016 ◽  
Vol 14 (3) ◽  
pp. 247-258 ◽  
Author(s):  
C. Zeitlin ◽  
A. W. Case ◽  
N. A. Schwadron ◽  
H. E. Spence ◽  
J. E. Mazur ◽  
...  
Keyword(s):  
Energy Spectrum ◽  
Cosmic Ray ◽  
Solar Modulation ◽  
Deep Space ◽  
Lineal Energy ◽  
Galactic Cosmic Ray

scholarly journals Solar Modulation Effects in Terrestrial Production of Carbon-14

Radiocarbon ◽  
1980 ◽  
Vol 22 (2) ◽  
pp. 133-158 ◽  
Author(s):  
Giuliana Castagnoli ◽  
Devendra Lal
Keyword(s):  
Solar Activity ◽  
Cosmic Ray ◽  
Solar Modulation ◽  
Carbon 14 ◽  
Cosmic Ray Modulation ◽  
The Earth ◽  
Secular Variations ◽  
Galactic Cosmic Ray ◽  
Long Term Variations

This paper is concerned with the expected deviations in the production rate of natural 14C on the earth due to changes in solar activity. We review the published estimates of the global production rates of 14C due to galactic and solar cosmic ray particles, and present new estimates of the expected secular variations in 14C production, taking into account the latest information available on galactic cosmic ray modulation and long-term variations in solar activity.

Cosmic-ray proton and helium spectra and solar modulation effects in the new solar cycle measured with a four-element counter telescope

1968 ◽  
Vol 46 (10) ◽  
pp. S883-S886 ◽  
Author(s):  
J. F. Ormes ◽  
W. R. Webber
Keyword(s):  
Scintillation Counter ◽  
Pulse Height ◽  
Cosmic Ray ◽  
Geometrical Factor ◽  
Solar Modulation ◽  
Primary Proton ◽  
Before And After ◽  
Order Of Magnitude ◽  
Helium Spectra ◽  
Counter Telescope

In the summers of 1965 and 1966 we have continued our studies begun in 1963 on the primary proton and helium spectra and the effects of solar modulation. Data are available from four additional balloon flights at Fort Churchill using the earlier version of the Cerenkov-scintillation counter telescope (Ormes and Webber 1966), and a new four-element double-scintillation (dE/dx), Cerenkov-scintillation + range telescope. This latest telescope employs pulse-height analysis on both dE/dx counters and the Cerenkov-scintillation counter. Various consistency requirements may be set between pulse heights. These serve to reduce background effects by an order of magnitude over the previous system. The geometrical factor of the telescope is 55.4 sr cm2. The results reported here will cover the proton and helium spectra from 100 MeV/nucleon to 2 BeV/nucleon and their time variation. They will show that the fractional changes in the differential proton spectra can be represented by (rigidity)−1 both before and after the sunspot minimum and that there is no evidence for any hysteresis effects between protons of 100 MeV to 2 BeV and energies to which neutron monitors respond.

scholarly journals Latitude survey investigation of galactic cosmic ray solar modulation during 1994-2007

2016 ◽  
Author(s):  
Waraporn Nuntiyakul ◽  
Paul Evenson ◽  
David Ruffolo ◽  
A. Saiz ◽  
J. W. Bieber ◽  
...  
Keyword(s):  
Cosmic Ray ◽  
Solar Modulation ◽  
Galactic Cosmic Ray
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