Speaker
Prof.
Wonho Choe
(Korea Advanced Institute of Science and Technology (KAIST))
Description
A Hall plasma thruster is a type of electric propulsion that generates thrust by accelerating unmagnetized ions through an electric potential gradient in the axial direction established by azimuthal Hall drift (ExB) electrons within crossed (axial) electric and (radial) magnetic fields. In the Hall thruster plasma study, accurate measurement of the plasma and the ion beam parameters is a key to characterize the produced ion beam and to understand the underlying physics. In addition to electrical diagnostics such as Faraday probe, retarding potential analyzer, and ExB probe, a laser induced fluorescence (LIF) diagnostic is one of the most important diagnostics to provide spatio-temporal velocity distribution of the accelerated ions, which can provide information on the electric potential structure inside the acceleration zone. In this work, we present the design, the installation, and the preliminary result of the LIF system, using a 834.723 nm diode laser for xenon ion velocity distribution function. The LIF system is expected to also provide information such as the velocity map of ions, the plasma oscillations, etc [1].
[1] S. Mazouffre, Plasma Sources Sci. Technol. 22 (2013) 013001
Primary author
Prof.
Wonho Choe
(Korea Advanced Institute of Science and Technology (KAIST))
Co-authors
Mr
Guentae Doh
(Korea Advanced Institute of Science and Technology (KAIST))
Dr
Holak Kim
(Korea Advanced Institute of Science and Technology (KAIST))
Mr
Seunghun Lee
(Korea Institute of Materials Science (KIMS))
Dr
Sung-Young Yoon
(National Fusion Research Institute (NFRI))
