Measurement of xenon plasma properties in an ion thruster using laser Thomson scattering
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説明
This paper reports on the development of a method for measuring xenon plasma properties using the laser Thomson scattering technique, for application to ion engine system design. The thresholds of photo-ionization of xenon plasma were investigated and the number density of metastable atoms, which are photo-ionized by a probe laser, was measured using laser absorption spectroscopy, for several conditions. The measured threshold energy of the probe laser using a plano-convex lens with a focal length of 200 mm was 150 mJ for a xenon mass flow rate of 20 μg/s and incident microwave power of 6 W; the probe laser energy was therefore set as 80 mJ. Electron number density was found to be (6.2 ± 0.4) × 10^<17> m^<−3> and electron temperature was found to be 2.2 ± 0.4 eV at a xenon mass flow rate of 20 μg/s and incident microwave power of 6 W. The threshold of the probe laser intensity against photo-ionization in a miniature xenon ion thruster is almost constant for various mass flow rates, since the ratio of population of the metastable atoms to the electron number density is little changed.
収録刊行物
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- Review of Scientific Instruments
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Review of Scientific Instruments 83 (7), 073106-1-073106-6, 2012-07-23
American Institute of Physics
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詳細情報 詳細情報について
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- CRID
- 1050861482658074880
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- NII論文ID
- 120004372636
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- NII書誌ID
- AA00817730
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- HANDLE
- 2324/23217
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- 本文言語コード
- en
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- 資料種別
- journal article
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- データソース種別
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- IRDB
- CiNii Articles
