Mechanical properties analysis of a 20 cm diameter ion thruster

Table 1. Effective property of the grids of 20 cm ion thruster
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Table 1. Effective property of the grids of 20 cm ion thruster
component material transparency effective density/(kg·m⁻³) effective Young’s modulus /GPa Poisson ratio
the screen grid Mo 0.69 2973 99.2 0.31
the accelerator grid Mo 0.27 7001 233.6 0.31

Table 2. Comparison of modal analysis for different FEM models of the accelerator grid

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Table 2. Comparison of modal analysis for different FEM models of the accelerator grid

structure	modal analysis results of the accelerator grid/Hz
structure	1st step	2nd step	3rd step	4th step	5th step	6th step
with-aperture (reality)	51.815	207.55	251.89	303.24	427.88	474.92
without-aperture (effective)	47.193	194.05	237.34	293.65	405.02	453.04

Table 3. Different components material property of 20 cm ion thruster

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Table 3. Different components material property of 20 cm ion thruster

components	material	density/(kg·m⁻³)	Young’s modulus/GPa	Poisson ratio	extension strength/MPa
mount ring	2A12	2700	72	0.31	265
up/down harness	2A12	2700	72	0.31	265
magnet (effective）	—	4105	72	0.31	265
up/down magnet pole	DT4	7830	81	0.29	170
hollow cathode	1Cr18Ni9Ti	7930	193	0.31	200
bolts	TC-4	4620	96	0.34	825

Table 4. Primary 6 step modal frequencies and effective mass percentage of thruster
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Table 4. Primary 6 step modal frequencies and effective mass percentage of thruster
modal frequency/Hz x-direction/% y-direction/% z-direction/%
1 246.066 35 1 1
2 248.167 1 37 0
3 338.722 4 0 50
4 404.484 0 17 0
5 411.324 15 0 3
6 605.016 0 0 1

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Kai Shi, Mingming Sun, Zuo Gu, Shichao Yue. Mechanical properties analysis of a 20 cm diameter ion thruster[J]. High Power Laser and Particle Beams, 2022, 34(4): 044005

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Paper Information

Category: Particle Beams and Accelerator Technology

Received: Sep. 26, 2021

Accepted: Jan. 28, 2022

Published Online: Apr. 12, 2022

The Author Email: Mingming Sun (smmhappy@163.com)

DOI:10.11884/HPLPB202234.210419

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Effective property of the grids of 20 cm ion thruster

Table 1. Effective property of the grids of 20 cm ion thruster

Table 2. Comparison of modal analysis for different FEM models of the accelerator grid

Table 2. Comparison of modal analysis for different FEM models of the accelerator grid

Table 3. Different components material property of 20 cm ion thruster

Table 3. Different components material property of 20 cm ion thruster

Table 4. Primary 6 step modal frequencies and effective mass percentage of thruster

Table 4. Primary 6 step modal frequencies and effective mass percentage of thruster