Studying the great solar proton events during the solar cycle 23

Samwel, Susan W.; Hady, Ahmed A.; Ibrahim, Makram; Hanna, Yousry S.

doi:10.1017/s174392130600202x

Cited by 3 publications

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“…It is known that the radiation environment can produce a myriad of hazards to an orbiting satellite [cf. Hastings and Garrett, 1996;Samwel et al, 2006]. In order to mitigate the damage caused by space radiation, it is essential for a thorough radiation analysis to be performed on the satellite orbit.…”

Section: Introductionmentioning

confidence: 99%

Space radiation environment forecast for EGYPTSAT‐2 satellite

Samwel

Hady

2009

Space Weather

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The space environment provides an assortment of hazards whose ill effects can range from degraded performance up to catastrophic loss of a spacecraft. The radiation environment is believed to be the most significant in terms of spacecraft failures. Hence, the present work provides a radiation analysis for the EGYPTSAT‐2 which is supposed to be launched in 2012 as a low Earth orbit satellite in order to assist the EGYPTSAT‐2 instrument team with adequate planning decisions. AE‐8, AP‐8, Jet Propulsion Laboratory (JPL) model, and the cosmic ray effects in microelectronic (CREME86) code are used to estimate the fluences of the trapped electrons and protons, solar protons, and galactic cosmic protons, respectively. SHIELDOSE‐2 code is used for space‐shielding radiation dose calculations, and the nonionizing energy loss function is used to estimate the nonionizing dose of space radiation. Finally, the end‐of‐life solar cell performance is evaluated using the displacement damage dose (DDD) method. The slowed down spectra emerging from the shielding material is obtained using the Multilayered Shielding Simulation Software (MULASSIS) code. It has been found that the radiation environment will not impede the sensitivity of EGYPTSAT‐2 materials over the course of the baseline mission lifetime. For 1.5 mm aluminum shielding thickness, total ionizing dose is 2.65 × 104 rads (Si) and DDD is 7.75 × 107 MeV/g(Si) for 5 years mission length, which are less than critical thresholds. Also, a flat glass of SiO2 sheet of thickness 0.5 mm is enough to resist the damage effect of the solar array cells.

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Section: Introductionmentioning

confidence: 99%

Space radiation environment forecast for EGYPTSAT‐2 satellite

Samwel

Hady

2009

Space Weather

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Descriptive study of solar activity sudden increase and Halloween storms of 2003

Hady

2009

Journal of Atmospheric and Solar-Terrestrial Physics

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Descriptive study of X-class flares released in the year 2014, during the double peak of SC-24

2015

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During the declining phase of the Solar cycle 24, a new peak appeared on January 7, 2014. The release of x-class flares, with the high energetic particles, were found to be more intense than that occurred during the main peak of the same cycle. Few X-class flares were released, lately, during the year 2014. We note that during the last 5 solar cycles, a new peak has appeared, releasing high energetic particles and X-class solar flares, which are called the secondary peak or the double peak of solar cycle. The aim of this descriptive study is to follow the morphological and magnetic changes of the active region before, during, and after the production of X-class flares according to data analysis. Furthermore, the causes of the release of such eruptive storms have been discussed for the period, year 2014, during the double peak of the solar cycle 24.

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Studying the great solar proton events during the solar cycle 23

Cited by 3 publications

References 1 publication

Space radiation environment forecast for EGYPTSAT‐2 satellite

Space radiation environment forecast for EGYPTSAT‐2 satellite

Descriptive study of solar activity sudden increase and Halloween storms of 2003

Descriptive study of X-class flares released in the year 2014, during the double peak of SC-24

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