レーザートムソン散乱法による小型マイクロ波放電型イオンエンジンにおけるプラズマ状態の測定 (イオン加速グリッド耐久認定用数値解析 JIEDI(JAXA Ion Engine Development Initiatives) ツールの研究開発ワークショップ論文集)

概要

論文の詳細を見る
The plasma parameters, electron number density and electron energy distribution function, in a miniature microwave discharge ion thruster were successfully measured by means of laser Thomson scattering without perturbations. A photon counting method and a double monochromator were used against small Thomson scattering signal and strong stray laser light. The result shows an electron energy distribution function is Maxwellian, since the scattered spectrum can be fitted by Gaussian at the temperature of 1.5 eV. An electron density is 2.3×10^<18> m^<-3>. The measured electron number density and electron temperature values were found to be reasonable compared with estimation deduced form extracted ion beam current.