Erosion sensor using time-resolved cavity ring-down spectroscopy for Hall thrusters

Yusuke Egawa, Naoji Yamamoto, Atsushi Yamaguchi, Taichi Morita

Research output: Contribution to journalArticlepeer-review

Abstract

A high-sensitivity sensor to measure titanium atom density based on time-resolved cavity ring-down spectroscopy (CRDS) was developed to monitor the wall erosion and predict the lifetime of Hall thrusters. The minimum detection limit for the sensor was dependent on the discharge current oscillation in the Hall thruster. A Volterra engine management system was employed for time-resolved measurements to develop the time-resolved CRDS system, which was synchronized to the discharge current oscillation. The results confirmed that the path-integrated number density of sputtered titanium atoms was synchronized with the discharge current oscillation. The minimum detection limit was decreased by ∼30% from 2 × 1012 to 6 × 1011 m-2.

Original languageEnglish
Article number113105
JournalReview of Scientific Instruments
Volume91
Issue number11
DOIs
Publication statusPublished - Nov 1 2020

All Science Journal Classification (ASJC) codes

  • Instrumentation

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