title: Note: An approach to measurement of low frequency oscillation amplitude of discharge current of in-orbit Hall thruster.
abstract: This paper provides a method to measure the amplitude of low frequency oscillation under the on-track working condition, and realizes the sampling by means of adding the circuit design of sampling, low pass filtering by 3 dB at 48.2 kHz, detection and integrating in the filtering unit. The experimental results prove that the measuring device of merely 0.8 g can quantitatively reflect the amplitude of low frequency oscillation in Hall thruster and the maximum deviation of experiment data and theory data is 10% FS.
authors.affiliation: Harbin Institute of Technology, Mail Box 3047, Harbin, People's Republic of China.
authors.forename: Liang
authors.initials: L
authors.lastname: Han
authors.affiliation: Harbin Institute of Technology, Mail Box 3047, Harbin, People's Republic of China.
authors.forename: Yongjie
authors.initials: Y
authors.lastname: Ding
authors.affiliation: Harbin Institute of Technology, Mail Box 3047, Harbin, People's Republic of China.
authors.forename: Liqiu
authors.initials: L
authors.lastname: Wei
authors.affiliation: Harbin Institute of Technology, Mail Box 3047, Harbin, People's Republic of China.
authors.forename: Daren
authors.initials: D
authors.lastname: Yu