2023/11/04 by Y. Dancheva, Pietro Coniglio, Dancheva, Y. +7
Engineering · Physics and Astronomy · #Applied Physics (physics.app-ph) #Atomic Physics (physics.atom-ph) #Atomic and Molecular Physics #FOS: Physical sciences #Instrumentation and Detectors (physics.ins-det) #Laser-induced spectroscopy and plasma #Plasma Diagnostics and Applications
paper · pdf · doi:10.48550/arxiv.2311.02479
openalex publication_date 2023/11/04 · openalex created_date 2023/11/08 · openalex updated_date 2026/08/04
Electric propulsion requires exhaustive ground test campaigns to obtain an accurate characterization of the propulsion devices, or thrusters, used by the spacecraft. Among the many plasma parameters, accurately measured during the tests, that of the ion velocity is key, and can be measured using non-intrusive tools such as Laser-Induced Fluorescence (LIF) diagnostics. The ion velocity is inferred by Doppler shift measurements that presupposes a precise and accurate knowledge of the wavelength of excitation of the ions at rest. Today electric propulsion is moving towards the use of Krypton as a propellant, due to the dramatic increase in cost of the more advantageous Xenon gas propellant, commonly used until now. In this work the 4d4D7/2→5p4P^∘5/2 transition of Kr II is used for LIF diagnostic in hollow cathode discharge.