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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.8
- 수록면
- 1,817 - 1,825 (9page)
- DOI
- 10.1016/j.net.2020.01.016
이용수
초록· 키워드
오류제보하기
Background: Cosmic ray-induced particles can lead to failure of semiconductors packaged for export during air transport. This work performed MCNP 6.2 simulations to optimize shielding against neutrons and protons induced by cosmic radiation Methods and materials: The energy spectra of protons and neutrons by incident angle at the flight altitude were determined using atmospheric cuboid model. Various candidates for the shielding materials and the geometry of the Unit Load Device Container were evaluated to determine the conditions that allow optimal shielding at all sides of the container.
Results: It was found that neutrons and protons, at the flight altitude, generally travel with a downward trajectory especially for the particles with high energy. This indicated that the largest number of particles struck the top of the container. Furthermore, the simulation results showed that, among the materials tested, borated polyethylene and stainless steel were the most optimal shielding materials. The optimal shielding structure was also determined with the weight limit of the container in consideration.
Conclusions: Under the determined optimal shielding conditions, a significantly reduced number of neutrons and protons reach the contents inside the container, which ultimately reduces the possibility of semiconductor failure during air transport
목차
등록된 정보가 없습니다.
참고문헌 (26)
참고문헌 신청
M. Pazianotto / 2017 / Extensive air shower Monte Carlo modeling at the ground and aircraft flight altitude in the South Atlantic Magnetic Anomaly and comparison with neutron measurements / Astropart. Phys 88:17~29
P. Paschalis / 2014 / Geant4 software application for the simulation of cosmic ray showers in the Earth's atmosphere / New Astron 33:26~37
S. Roesler / 2002 / Monte Carlo calculation of the radiation field a aircraft altitudes / Radiat. Prot. Dosim 98(4):367~388
A. Ferrari / 2001 / Calculation of the radiation environment caused by galactic cosmic rays for determining air crew exposure / Radiat. Prot. Dosim 93(2):101~114
S. El-Jaby / 2015 / Monte Carlo simulations of the secondary neutron ambient and effective dose equivalent rates from surface to suborbital altitudes and low Earth orbit / Life Sci. Space Res 6:1~9
P. Paschalis / 2014 / Geant4 software application for the simulation of cosmic ray showers in the Earth's atmosphere / New Astron 33:26~37
S. Roesler / 2002 / Monte Carlo calculation of the radiation field a aircraft altitudes / Radiat. Prot. Dosim 98(4):367~388
A. Ferrari / 2001 / Calculation of the radiation environment caused by galactic cosmic rays for determining air crew exposure / Radiat. Prot. Dosim 93(2):101~114
S. El-Jaby / 2015 / Monte Carlo simulations of the secondary neutron ambient and effective dose equivalent rates from surface to suborbital altitudes and low Earth orbit / Life Sci. Space Res 6:1~9
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