Ion Behavior in Photoionization Plasma Originating from One-Directional Atomic Vapor Flow under External Electric Field.
スポンサーリンク
概要
- 論文の詳細を見る
<BR>After plasmas were instantly produced between parallel plate electrodes by illuminating pulsed laser light onto a one-directional atomic vapor stream, their ion extraction characteristics were clarified by measuring the time evolution of the ion density distribution. <BR>The flow velocity of the bulk plasma agrees with the mean velocity of atoms at the evaporation temperature for collisionless emanation. However, when the collisional effect plays an important part, the plasma is accelerated due to energy transfer to the linear motion by relaxation of metastable atoms, in addition to the adiabatic expansion. The expansion velocity of the plasma edge into a vacuum is given by the ambipolar expansion velocity corresponding to that of an ion acoustic wave. Ion extraction by the external electric field proceeds in three distinct stages. First, an ion sheath is formed as a result of electron repulsion by a potential penetration. Then, only the plasma edge in the lower potential side recedes rapidly from its initial position without any appreciable decrease of the ion density, and lastly, retrogression of the plasma edge and the density decay evolve simultaneously, accompanying the plasma diffusion.
- 一般社団法人 日本原子力学会の論文
著者
-
Yoshioka Ken
Energy Research Laboratory Hitachi Ltd.
-
Yamada Kimio
Energy Research Laboratory Hitachi Ltd.
-
TETSUKA Tsutomu
Energy Research Laboratory, Hitachi Ltd.
-
OKADA Hidetoshi
Energy Research Laboratory, Hitachi Ltd.
関連論文
- Ion Transport from Laser Induced Metal Plasma to Ion Extraction Electrodes
- Application of Fission Chamber to Uranium Microanalysis
- Feedback Controller Synthesis for Tokamak Plasma Position Control
- Equilibrium Plasma Control for a Large Tokamak with Many Poloidal Coils to Produce the Ohmic and Equilibrium Field
- Measurement of Mechanical Vibration Using a Laser Speckle Correlation Method
- Algorithm for cause analysis using cause consequence model.
- Ion Behavior in Photoionization Plasma Originating from One-Directional Atomic Vapor Flow under External Electric Field.
- Failure diagnosis procedure for large tokamak machines.
- Ion Extraction Characteristics on a Barium Plasma Produced between Alternately Biased Parallel Plate Electrodes.
- Separation of barium isotopes by selective two-step photoionization process.