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@InProceedings{lajoie:napac2019-moybb5,
author = {A. Lajoie and J. Gao and F. Marti},
title = {{Characterization and Performance of Plasma Window for Gas Flow Restriction in Different Geometries}},
booktitle = {Proc. NAPAC'19},
pages = {44--46},
paper = {MOYBB5},
language = {english},
keywords = {plasma, electron, cathode, target, diagnostics},
venue = {Lansing, MI, USA},
series = {North American Particle Accelerator Conference},
number = {4},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2019},
issn = {2673-7000},
isbn = {978-3-95450-223-3},
doi = {10.18429/JACoW-NAPAC2019-MOYBB5},
url = {http://jacow.org/napac2019/papers/moybb5.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-MOYBB5},
abstract = {The plasma window is a DC cascaded arc whose function is to restrict gas flow from a high pressure region to a low pressure region without the use of any solid separation*. As a result, the plasma window allows a greater pressure to be maintained than otherwise possible. This is a beneficial characteristic for gas charge strippers for ion accelerators, since the higher pressures enable the stripper to be shorter and allow the same amount of stripping interactions**. The flow rate reduction is established by the increase in gas temperature from the power deposited into the plasma via the cathodes, resulting in a dramatically increased viscosity. The flow rate reduction, depends on the properties of the plasma, including the electron density and temperature, pressure, and electrical conductivity. Understanding these properties in multiple arc geometries - in this work having either 6 mm or 10 mm channel diameter - provides a means optimizing the plasma window for a given design. Determinations of the properties for different conditions are shown, and results are compared with a PLASIMO simulation, which has been shown to yield comparable properties to measurements in an argon arc***.},
}