中文核心期刊
CNKI期刊全文数据库
中国科学引文数据库(CSCD)源期刊
中国科技论文统计源期刊
万方数据知识服务平台
英国《科学文摘》(SA)
美国化学文摘(CA)
俄罗斯《文摘杂志》(AJ)
德国《天文学与天体物理学文摘》(AAA)
英国《中国天文学和天体物理学》(SCI收录)全文摘译期刊之一
《中国学术期刊文摘》
《中国物理文摘》
《中国天文学文摘》

• 日球层物理和太阳系探测 • Previous Articles     Next Articles

Simulation study on single event upset induced by near space atmospheric neutron in electronic devices

Zhang Zhenli1,2, Zhang Zhenlong1, Han Jianwei1, An Guangpeng1, Cai Minghui1, Feng Guoqiang1, Ma Yingqi1,2   

  1. (1.Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190; 2.Graduate University of Chinese Academy of Sciences, Beijing 100049)
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-05-15 Published:2011-05-15
  • Contact: Zhang Zhenli

Abstract: Single Event Upset (SEU) induced by atmospheric neutron is harmful for near space craft, and is studied by numeric simulation in present paper. Static Random-Access Memory (SRAM) device which has regularly arrayed cells is selected as the simulation object. Using Rectangular Parallelepiped (RPP) Model as the basic model and extracting key parameters from SEU experiment data of heavy ions, sensitive volume model of SEU due to nuclear reactions between incident neutron and device materials is established. Simulation and research show that the secondary heavy ions resulting from the high energy neutrons can transfer approximate 4 microns. Consequently, to simulate the SEU events thoroughly, an extra volume beyond 4 microns from the sensitive volume is taken into account. Modeling and simulation are performed for HM62256 and HM628128 SRAM devices respectively with the help of GEANT 4 software package. The secondary particles in and near the sensitive volume contributing to SEU are considered. Differential spectrums of the deposited energy in the sensitive volume by the secondary particles are calculated. Eventually SEU events due to the secondary particles which deposited different energy in the sensitive volume are summed up. The results of the simulation agree well with those of ground experiments performed with 14 MeV neutrons and high energy protons.

Key words: Adipogenesis, Human mesenchymal stem cells, Microgravity, Osteogenesis, Signaling pathways