The effect of convection and adiabatic deceleration on the time to maximum flux in energetic solar particle events

1976 ◽  
Vol 209 ◽  
pp. L101 ◽  
Author(s):  
M. Scholer
Keyword(s):  
Solar Particle Events ◽  
Energetic Solar Particle ◽  
Solar Particle ◽  
Maximum Flux

Energetic solar particle events in a stream-structured solar wind

Solar Physics ◽  
1979 ◽  
Vol 64 (2) ◽  
pp. 391-401 ◽  
Author(s):  
M. Scholer ◽  
G. Morfill ◽  
A. K. Richter
Keyword(s):  
Solar Wind ◽  
Solar Particle Events ◽  
Energetic Solar Particle ◽  
Solar Particle

Comparison of Radiation Transport Codes for Solar Particle Events Space Environment: II

2009 ◽  
Author(s):  
Ram Tripathi ◽  
Lawrence Townsend ◽  
Tony Gabriel ◽  
Lawrence PIinsky ◽  
Tony Slaba
Keyword(s):  
Radiation Transport ◽  
Space Environment ◽  
Solar Particle Events ◽  
Solar Particle

scholarly journals Radiation Risks in Cis-Lunar Space for a Solar Particle Event Similar to the February 1956 Event

Aerospace ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 107
Author(s):  
Fahad A. Zaman ◽  
Lawrence W. Townsend
Keyword(s):  
Effective Dose ◽  
Energy Transport ◽  
Radiation Transport ◽  
Organ Doses ◽  
Solar Particle Events ◽  
Solar Particle ◽  
Transport Code ◽  
On Line ◽  
Critical Organ ◽  
In Cis

Solar particle events (SPEs) can pose serious threats for future crewed missions to the Moon. Historically, there have been several extreme SPEs that could have been dangerous for astronauts, and thus analyzing their potential risk on humans is an important step towards space exploration. In this work, we study the effects of a well-known SPE that occurred on 23 February 1956 on a mission in cis-Lunar space. Estimates of the proton fluence spectra of the February 1956 event were obtained from three different parameterized models published within the past 12 years. The studied geometry consists of a female phantom in the center of spherical spacecraft shielded by aluminum area densities ranging from 0.4 to 40 g cm−2. The effective dose, along with lens, skin, blood forming organs, heart, and central nervous system doses, were tallied using the On Line Tool for the Assessment of Radiation In Space (OLTARIS), which utilizes the High Z and Energy TRansport code (HZETRN), a deterministic radiation transport code. Based on the parameterized models, the results herein show that thicknesses comparable to a spacesuit might not protect against severe health consequences from a February 1956 category event. They also show that a minimum aluminum shielding of around 20 g cm−2 is sufficient to keep the effective dose and critical organ doses below NASA’s permissible limits for such event. In addition, except for very thin shielding, the input models produced results that were within good agreement, where the doses obtained from the three proton fluence spectra tended to converge with slight differences as the shielding thickness increases.

scholarly journals Origin of two extreme solar particle events

2017 ◽  
Author(s):  
Aleksandar Mishev ◽  
Leon Kocharov ◽  
S. Pohjolainen ◽  
M.J. Reiner ◽  
Jeongwoo Lee ◽  
...  
Keyword(s):  
Solar Particle Events ◽  
Solar Particle

scholarly journals OBSERVATIONS OF THE 2006 DECEMBER 13 AND 14 SOLAR PARTICLE EVENTS IN THE 80 MeV n–1-3 GeV n–1RANGE FROM SPACE WITH THE PAMELA DETECTOR

2011 ◽  
Vol 742 (2) ◽  
pp. 102 ◽  
Author(s):  
O. Adriani ◽  
G. C. Barbarino ◽  
G. A. Bazilevskaya ◽  
R. Bellotti ◽  
M. Boezio ◽  
...  
Keyword(s):  
Solar Particle Events ◽  
Solar Particle
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