High-sensitivity boron nitride sputter erosion measurements by continuous-wave cavity ring-down spectroscopy

Azer P. Yalin, Lei Tao, Ryan Sullenberger, Masashi Oya, Naoji Yamamoto, Timothy B. Smith, Alec D. Gallimore

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

3 被引用数 (Scopus)

抄録

Sputter erosion of boron nitride (BN) plays a key life-limiting role in many Hall thrusters. We report on the development of cavity ring-down spectroscopy (CRDS) as a sensitive and accelerated diagnostic for sputter erosion. The measurement approach is based upon probing sputtered boron atoms in the region of 250 nm. We present quantitative detection of sputtered BN using CRDS with a pulsed laser source. The pulsed measurement results are compared with modeled signal levels. We update the development of a continuous-wave CRDS system using the frequency-quadrupled output of an external cavity diode laser as the light source. Characterizations of the measurement sensitivity show that with integration times of several minutes, the current performance would allow high signal-to-noise erosion measurements for expected thruster conditions. Approaches to increase sensitivity (reduce measurement time) and to integrate with vacuum chambers for thruster testing are summarized.

本文言語英語
ホスト出版物のタイトル44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
出版ステータス出版済み - 2008
イベント44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit - Hartford, CT, 米国
継続期間: 7 21 20087 23 2008

出版物シリーズ

名前44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit

その他

その他44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit
国/地域米国
CityHartford, CT
Period7/21/087/23/08

All Science Journal Classification (ASJC) codes

  • 航空宇宙工学
  • 制御およびシステム工学
  • 宇宙惑星科学
  • エネルギー(全般)
  • 電子工学および電気工学
  • 機械工学

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