Properties of an Ablation Plasma at Very Low Target Temperatures
| Autor: | Hugo Sobral, L. Angel Garcia-Villarreal, A. Robledo-Martinez |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Spectrometer Physics::Instrumentation and Detectors business.industry Cold finger Plasma Atmospheric temperature range Helium-3 refrigerator law.invention Optics Physics::Plasma Physics law Physics::Space Physics Physics::Atomic and Molecular Clusters Vacuum chamber Emission spectrum business Monochromator |
| Zdroj: | 2021 IEEE International Conference on Plasma Science (ICOPS). |
| DOI: | 10.1109/icops36761.2021.9588474 |
| Popis: | It has been long established that the intensity of the lines emitted by an ablation plasma increases monotonically when the target is heated above room temperature 1 . In this work we investigate if this trend continues at cryogenic temperatures such as those encountered in space exploration and in ablation-plasma thrusters. The experiment consisted in placing an aluminum target inside a vacuum chamber and in close contact with the cold finger of a helium refrigerator that operated in the temperature range 20-290 K. The focused beam of a nanosecond laser induced the plasma on the target's surface. The lines emitted by the plasma were recorded using both an echelle spectrometer and a monochromator. From the emission lines we obtained the electronic temperature and density of the plasma. |
| Databáze: | OpenAIRE |
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