Volume 32 Issue 1
Jan.  2012
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HUANG Yong, SHI Jiaming, YUAN Zhongcai. Comparison of Ionospheric Modification by Different Chemicals Release[J]. Journal of Space Science, 2012, 32(1): 33-39. doi: 10.11728/cjss2012.01.033
Citation: HUANG Yong, SHI Jiaming, YUAN Zhongcai. Comparison of Ionospheric Modification by Different Chemicals Release[J]. Journal of Space Science, 2012, 32(1): 33-39. doi: 10.11728/cjss2012.01.033

Comparison of Ionospheric Modification by Different Chemicals Release

doi: 10.11728/cjss2012.01.033
  • Received Date: 2010-11-17
  • Rev Recd Date: 2011-10-09
  • Publish Date: 2012-01-15
  • Six chemicals, H2, H2O, CO2, SF6, CF3Br and Ni(CO)4, are considered as ionospheric modification materials. Each of these chemicals reacts in the F region to produce localized plasma depletions and form large scale electron holes. In the active ionospheric modification experiments, the criteria for selecting the released chemicals include the cost and effectiveness. The effectiveness of released chemicals depends on the amount which goes into the vapor state. In this paper, the thermodynamics governing the vapor fraction of the released chemicals were investigated. Additionally, the size and magnitude of the electron depletions were calculated with finite element simulation method. The results show that H2O has the lowest vapor yield of about 19% from a heated, pressurized tank, and over 60% of the other five chemicals should be vented in gaseous form. To reduce the cost, the chemicals with small density, such as H2 or CO2 may be chosen. Based on estimating the electron density reduction, the chemicals which have slow diffusion speed and large chemical reaction rates, such as SF6 or Ni(CO)4, may be selected. These chemicals can produce a larger, deeper and more durable electron hole.

     

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