Electron beam ablation propulsion method and system

Abstract

The invention provides an electron beam ablation propulsion method and system. The electron beam ablation propulsion method comprises the following steps: an electron beam generator is adopted to generate an electronic beam and lead the electronic beam to shoot at a target through an outlet of the electron beam generator; the electronic beam ablates the target to generate a kickback thrust to push the target. The invention has very high energy conversion efficiency, solves the problem of being incapable of using singleton metals with high specific impulse performances due to low coupling coefficient of impulses in laser ablation propulsion technology, has extremely short action time, can realize single injection of tiny impulse, has quick response time for the mutual action with the target, has small ablation beam spots and action area, is convenient to precisely locate the propulsion, can finish control on the propulsion performances by adjusting the pulse width, frequency, and peak power density, and the like of a beam source, is not influenced by the reflection performance of the target, and has very low ablation quality for each pulse; therefore, a propeller has very large overall pulse, and long service life.

Description

technical field [0001] The invention relates to plasma propulsion technology, in particular to an electron beam ablation propulsion method and system. Background technique [0002] In the aerospace field, satellite miniaturization has become a development trend. In recent years, with the development of mechanical microelectronics technology, micro-satellite, nano-satellite and pico-satellite technology has developed rapidly. In order to build a micro-satellite constellation, it is necessary to carry out precise orbit change and attitude adjustment control on the micro-satellites, which not only requires the thruster to be as small as possible, but also requires the thruster to provide a propulsive force with a range as large as possible, that is, to generate μN. Propelling force to the order of mN. [0003] Existing MEMS propulsion technologies include chemical propulsion and electric propulsion. Common thrusters need to be processed in centimeter-scale chips through chip ...

AI Technical Summary

Problems solved by technology

Because this propulsion technology uses laser as the energy source and the characteristics of the laser itself, the laser propulsion technology has the following disadvantages: 1. The energy conversion efficiency of the laser is low. The energy conversion efficiency of the commonly used CO2 laser is less than 20%, and the latest fiber laser conversion The efficiency does not exceed 30%, which leads to low energy utilization of the thruster; 2. For single-element materials with high specific impulse performance, the impulse coupling coefficient of laser ablation is low, and the thrust generated is small; 3. The relationship between laser and material The depth of action is relatively shallow; 4. It is difficult for lasers to ablate materials with high reflectivity, which limits the choice of target materials for thrusters; 5. Due to the long action time of millisecond-level lasers, the target material can only choose polymers with low thermal conductivity However, due to the limitations of existing laser technology, it is difficult to apply to microsatellites after miniaturization design.

Images