A method for estimating radiation dose rates from Earth-orbiting satellites

A radiation dose rate, earth orbit technology, applied in the field of satellite on-orbit space radiation environmental effect management

Active Publication Date: 2018-05-08
昆山中科空间科技有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of evaluating the spatial distribution of the low dose rate in space in order to solve the low dose rate enhancement effect of the bipolar device, and the present invention provides an evaluation method for evaluating the satellite radiation dose rate

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  • A method for estimating radiation dose rates from Earth-orbiting satellites
  • A method for estimating radiation dose rates from Earth-orbiting satellites
  • A method for estimating radiation dose rates from Earth-orbiting satellites

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Embodiment

[0039] The particle transport calculation tool involved in the following embodiments uses Geant4, the structural material of the spacecraft is aluminum, and the material of the sensitive area of ​​the device is silicon. However, the selection of particle transport calculation tools is not unique, and MCNP or EGS can also be used. The structural materials of the spacecraft and the sensitive area materials of the devices are constantly changing with the development of technology. This embodiment only For the convenience of description, only one material is used as an example, but a simple replacement of the material will not lead to substantial differences in the scheme.

[0040] Based on the assumption in the previous paragraph, the method for evaluating the satellite radiation dose rate provided in this embodiment specifically includes:

[0041] Step 1: Use Geant4 to calculate the energy-range table of the incident depth of space particles of different energies in the Al mater...

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Abstract

The present invention provides a method for evaluating the radiation dose rate of earth orbit satellites. The method includes: step 101, using the measured number of space particles within a period of time as continuous dynamic input, and using particle transport calculation tools to calculate different energies The depth of the particles in the satellite structure material and the energy deposition of the material in the sensitive area of ​​the device under different energies are respectively formed into a table; according to the spatial flux spectrum input by the space particle combined with the depth relationship of the space particle in the satellite structure material, the space particle at the target position is calculated. Particle flux spectrum; step 102, after obtaining the space particle flux spectrum at the target position, combining the energy deposition relationship of space particles with different energies in the material in the sensitive area of ​​the device, to obtain the space particles in the material in the sensitive area of ​​the device at the target position The sum of the energy deposition areal density; step 104, according to the sum of the energy deposition areal density and the density of the material in the sensitive area of ​​the device, calculate the radiation dose rate of the space particle at the target position.

Description

technical field [0001] The invention relates to the field of satellite in-orbit space radiation environmental effect management, in particular to a method for evaluating the radiation dose rate of earth orbit satellites. Background technique [0002] Elements such as high-energy electrons, high-energy protons, and heavy ions in the space radiation environment will cause radiation effects on satellites, especially high-energy electrons and high-energy protons, whose flux is greater than that of heavy ions. In the process of passing through matter, space particles will lose energy due to the resistance formed by the nucleus and extranuclear electrons, and the lost energy will be transferred to the blocking matter, resulting in the gradual dissimilation of the matter receiving the energy or the appearance of the device. Performance degradation, known as ionizing radiation dose effect. The radiation dose that a substance receives in a unit time is called the dose rate. When the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00G01T1/00
Inventor 杨垂柏曹光伟张贤国荆涛张斌全孔令高张珅毅梁金宝孙越强
Owner 昆山中科空间科技有限公司
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