A Scaling Law of the Life Estimation of the Three-Grid Optics for an Ion Engine

スポンサーリンク

概要

• 論文の詳細を見る

• A scaling law on the wear of three-grid optics is proposed for the lifetime estimation of ion engines. The charge exchange ions erode the accel grid holes; therefore, the reduced retarding potential results in electron backstreaming, which is the end of life of the three-grid optics. The arithmetic formulas are induced by use of the space-charge-limited current density law and a newly introduced parameter called the modified effective acceleration length. The model is based on the following scenario of grid life: (1) Charge exchange ion erosion enlarges the accel grid hole diameter, (2) which shortens the modified effective acceleration length between the screen and accel grids and (3) reduces the retarding potential to keep the beam current constant under the space-charge limited flow. The characteristic of the proposed formulas is that the lifetime of the three-grid optics strongly depends on the beam current and the accel grid voltage. The correlation between the arithmetic formulas and the numerical simulations showed good qualitative agreement with one another in all regions of the normalized perveance per hole and achieved quantitative consistency in its high value.

• 社団法人 日本航空宇宙学会の論文
• 2002-11-04

著者

• ARAKAWA Yoshihiro

  Department of Aeronautics and Astronautics, The University of Tokyo

• Tachibana Takeshi

  Department Of Mechanical Engineering Faculty Of Engineering Kyushu Institute Of Technology

• Tachibana Takeshi

  Department Of Material Science And Technology University Of Hyogo

• Tachibana Takeshi

  Department Of Mechanical Engineering Kyushu Institute Of Technology

• Arakawa Y

  Univ. Tokyo Tokyo Jpn

• Nakano Masakatsu

  Satellite Venture Business Laboratory Kyushu Institute Of Technology

• Arakawa Yoshihiro

  Department Of Aeronautics And Astronautics University Of Tokyo

• Arakawa Yoshihiro

  Department Of Aeronautics And Astronautics The University Of Tokyo

• Nakano Masaharu

  Satellite Venture Business Laboratory, Kyushu Institute of Technology

関連論文

• Laser Ignition Microthruster Experiments on KKS-1
• A Laser Ignition Microthruster for Microspacecraft Propulsion
• The Participation of Pharmacists in a Team to Introduce a Clinical Pathway to Laparoscopic Cystectomy in Obstetrics and Gynecology
• Suppression of Discharge Current Oscillations in a Hall Thruster
• Ignition Characteristics of GH_2/GO_X Mixture Using Laser Ablation Ignition
• Compatibility of Fuels and Radicals Found in Plasma Jets for Improved Premixed Combustion
• A Scaling Law of the Life Estimation of the Three-Grid Optics for an Ion Engine
• Preparation and Clinical Application of 2% Diflunisal Oral Ointment for Painful Lesions of the Oral Mucosa
• Development of Ethenzamide Ointment as a Pain Relief for Postherpetic Neuralgia
• A New Theophylline Ointment with Rapid and High Transdermal Delivery
• Fundamental Characteristics of a Laser Ablation Microthruster
• Effect of Solute Mixing in the Liquid Propellant of a Pulsed Plasma Thruster
• Development of Thrust Stand for Low Impulse Measurement from Microthrusters
• Burning Rate Control of Solid Propellants by Dielectric Heating
• One-Beam Polarization Multiplex Recordings in Photocrosslinkable Polymer Liquid Crystals
• Numerical Analysis of CW Laser Propulsion
• FEASIBILITY FOR THE ORBITAL LAUNCH BY PULSE LASER PROPULSION
• Thrust Evaluation of an Arcjet Thruster Using Dimethyl Ether as a Propellant

もっと見る 閉じる

スポンサーリンク